PSI-MOS-RS485W2/FO…
Fiber optic converter for RS-485 2-wire bus systems
Data sheet
101973_en_04
© PHOENIX CONTACT 2010-01-08
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A transparent protocol is used to convert all common
transmission speeds up to a maximum of 500 kbps. The
integrated optical diagnostics enable fiber optic paths to be
monitored continuously during installation and even during
operation. The floating switch contact is activated when the
signal output on the fiber optic paths drops to a critical level.
This early alarm generation enables critical system states to
be diagnosed before they result in failure.
PSI-MOS-RS485W2/FO… E termination devices convert
an RS-485 interface to a fiber optic cable. They are ideal for
point-to-point connections.
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Devices with different transmission technologies (polymer,
HCS, and glass fiber) can be freely combined within a star
coupler.
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All bus systems with 10/11-bit UART data format and NRZ
data encoding are supported. This includes popular bus
systems such as:
– Modbus ASCII/Modbus RTU
– SUCONET K
– S-BUS
– DH-485
– Various other company-specific bus systems
Virtually any cascadable star and tree structures can be
created using integrated bit retiming, even in a redundant
version if required. In this case, the required devices are
snapped onto DIN rail connectors, which ensure that the
supply voltage and data signals are routed through.
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PSI-MOS-RS485W2/FO… devices can be used to convert
RS-485 2-wire bus systems to fiber optics.
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PSI-MOS-RS485W2/FO… T fiber optic T-couplers convert
to two fiber optic cables.
Description
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1
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INTERFACE
PSI-MOS-RS485W2/FO 660... devices are networked
using polymer fiber cable for distances up to 100 m and
HCS fiber cable for up to 800 m. They are connected via
F-SMA quick mounting connectors, which can be
assembled locally within a few minutes.
PSI-MOS-RS485W2/FO 850 ... devices are available for
longer paths and can be used for distances up to 2800 m
using HCS fiber cable and B-FOC (ST®) fast connection
technology and up to 4200 m using multi-mode glass fiber
cable.
The PSI-MOS system can be used with input voltages from
18 V DC to 32 V DC and in a temperature range from -20°C
to +60°C.
If you have any technical problems, which you cannot resolve with the aid of this documentation, please contact
us during the usual office hours at:
Phone: +49 - 52 35 - 31 98 90
Fax: +49 - 52 35 - 33 09 99
E-mail: interface-service@phoenixcontact.com
Make sure you always use the latest documentation.
It can be downloaded at www.phoenixcontact.net/catalog.
This data sheet is valid for all products listed on the following page:
PSI-MOS-RS485W2/FO…
Table of contents
1
Description.................................................................................................................................. 1
2
Ordering data.............................................................................................................................. 3
3
Technical data ............................................................................................................................ 4
4
Safety regulations and installation notes..................................................................................... 7
4.1
4.2
Supported network structures..................................................................................................... 8
Point-to-point connections.............................................................................................................................. 8
Linear structures............................................................................................................................................. 8
Star structures ................................................................................................................................................ 8
Tree structures ............................................................................................................................................... 9
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5.1
5.2
5.3
5.4
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5
Installation and operation ............................................................................................................................... 7
Installation in zone 2 ...................................................................................................................................... 7
Function elements ...................................................................................................................... 9
7
Definition of fiber optic diagnostics ............................................................................................10
8
Configuration .............................................................................................................................11
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Connection notes ......................................................................................................................13
9.1
9.2
9.3
9.4
Combined assembly with a system power supply unit (modular star coupler) .............................................. 13
Assembly as an individual device in the control cabinet (stand-alone) ......................................................... 14
Assembly in potentially explosive areas ....................................................................................................... 14
Removal ....................................................................................................................................................... 14
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Setting the transmission speed .................................................................................................................... 11
10/11-bit selection (DIP 5) ............................................................................................................................ 11
Connection to fiber optic interfaces from third-party suppliers (DIP 6/7) ....................................................... 12
Activating the redundancy function (DIP 8)................................................................................................... 12
Disabling the second fiber optic port (DIP 9) ................................................................................................ 12
Switch with no function (DIP 10) ................................................................................................................... 12
Mixed operation of PSI-MOS and PSM-EG .................................................................................................. 12
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8.1
8.2
8.3
8.4
8.5
8.6
8.7
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6
10.1
10.2
10.3
10.4
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10 Cabling notes.............................................................................................................................15
Connecting the supply voltage ..................................................................................................................... 15
Connecting the data cables/bus termination................................................................................................. 15
Wiring the switch contact.............................................................................................................................. 16
Connecting the fiber optic cables ................................................................................................................. 17
11 Signal delay ...............................................................................................................................18
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PHOENIX CONTACT
2
PSI-MOS-RS485W2/FO…
2
Ordering data
Fiber optic converters
Description
Type
Order No.
Pcs./Pkt.
660 nm, for polymer/HCS fiber cable, F-SMA
PSI-MOS-RS485W2/FO 660 E
2708313
1
850 nm, for HCS/glass fiber cable, B-FOC (ST®)
PSI-MOS-RS485W2/FO 850 E
2708339
1
Termination device with one fiber optic interface
Fiber optic converter with integrated optical diagnostics, alarm contact, for
RS-485 2-wire bus systems (SUCONET K, Modbus, etc.) up to 500 kbps,
NRZ encoding
Fiber optic converter with integrated optical diagnostics, alarm contact, for
RS-485 2-wire bus systems (SUCONET K, Modbus, etc.) up to 500 kbps,
NRZ encoding
PSI-MOS-RS485W2/FO 660 T
850 nm, for HCS/glass fiber cable, B-FOC (ST®)
PSI-MOS-RS485W2/FO 850 T
2708300
1
2708326
1
Accessories
Description
Type
System power supply unit for supplying a modular star coupler topology
MINI-SYS-PS 100-240AC/24DC/1.5
2866983
1
System power supply unit for supplying a modular star coupler topology, for
potentially explosive areas
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660 nm, for polymer/HCS fiber cable, F-SMA
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T-coupler with two fiber optic interfaces
MINI-PS-100-240AC/24DC/1.5/EX
2866653
1
End clamps
CLIPFIX 35
3022218
50
DIN rail connector, power supply and data (2 per device)
ME 17,5 TBUS1,5/5-ST-3,81GN
2709561
10
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Order No.
DIN rail connector, power supply only (2 per device)
Pcs./Pkt.
ME 17,5 TBUS1,5/PP000-3,81BK
2890014
10
PSM-SET-FSMA/4-KT
2799720
1
PSM-SET-FSMA-POLISH
2799348
1
PSM-LWL-KDHEAVY
2744319
1
PSM-SET-FSMA/4-HCS
2799487
1
B-FOC (ST®) HCS fiber connectors (4 connectors in the set)
PSM-SET-B-FOC/4-HCS
2708481
1
Tool set for HCS connectors (F-SMA)
(required for HCS connector assembly)
PSM-HCS-KONFTOOL
2799526
1
PSM-HCS-KONFTOOL/B-FOC
2708465
1
Polishing set for polymer fiber connectors
(required to assemble polymer fiber connectors)
Fiber optic polymer fiber cable for indoor installation
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Tool set for HCS connectors (B-FOC (ST®))
(required for HCS connector assembly)
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F-SMA HCS fiber connectors (4 connectors in the set)
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Polymer fiber connectors (4 connectors in the set)
PSM-LWL-HCS RUGGED-200/230
2799885
1
PSM-LWL-HCSO-200/230
2799445
1
Fiber optic glass fiber cable for indoor installation
PSM-LWL-GDM-RUGGED-50/125
2799322
1
Fiber optic glass fiber cable for outdoor installation
PSM-LWL-GDO-50/125
2799432
1
Measuring device for fiber optic power measurement
PSM-FO-POWERMETER
2799539
1
Type
Order No.
Pcs./Pkt.
PSI-MOS-RS485W2/FO 1300 E
2708562
1
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Fiber optic HCS cable for indoor installation
Fiber optic HCS cable for outdoor installation
Other fiber optic converters in the PSI-MOS system
The PSI-MOS-RS485W2/FO 1300 E is networked for
distances up to 25 km using multi-mode glass fiber cable
and up to 45 km using single mode glass fiber cable.
Other fiber optic converters
Description
Fiber optic converter with integrated optical diagnostics, alarm contact, for
RS-485 2-wire bus systems (SUCONET K, Modbus, etc.) up to 500 kbps,
NRZ encoding, termination device with one fiber optic interface (SC duplex),
1300 nm, for glass fiber cable
101973_en_04
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PSI-MOS-RS485W2/FO…
3
Technical data
Interfaces
Power supply
24 V DC (18 V DC ... 32 V DC)
Nominal current consumption
130 mA, maximum
Ready-to-operate indicator
"VCC" LED (green)
Maximum star coupler expansion
10
Serial RS-485 interface
RS-485, 2-wire, automatic control
Operating mode
Half duplex
Bus termination resistor
220 Ω (can be connected to 390 Ω pull-up/pull-down)
Data format/encoding
UART (10/11-bit selection, NRZ)
Automatic control
Transmission speed (set via DIP switches)
4.8/9.6/19.2/38.4/57.6/75/93.75/115.2/136/187.5/375/500 kbps
Transmission length
Up to 1200 m, maximum depending on the transmission speed,
with shielded, twisted pair data cable
Connection
COMBICON plug-in screw terminal block
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Data direction changeover
Optical interface
Transparent protocol to RS-485 interface
F-SMA
Wavelength
660 nm
Minimum transmission power (fiber type)
-5.3 dBm (980/1000 μm)
-4.0 dBm (200/230 μm)
-16.0 dBm (200/230 μm)
-17.6 dBm (50/125 μm)
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Receiver sensitivity
General data
Bit distortion input
Bit distortion output
Bit delay
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Electrical isolation
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Minimum transmission length
Alarm output
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Minimum transmission length including 3 dB system reserve
850 nm
-14.6 dBm (62.5/125 μm)
-32.1 dBm (200/230 μm)
-3.0 dBm (980/1000 μm)
Maximum
B-FOC (ST®)
-32.5 dBm (50/125 μm/62.5/125 μm)
-30.1 dBm
Minimum
Test voltage
s.
Transmission protocol
Connection method
-3.0 dBm (200/230 μm)
100 m with F-P 980/1000; 230 dB/km 4200 m with F-G 50/125; 2.5 dB/km
800 m with F-K 200/230; 10 dB/km
with quick mounting connectors
4200 m with F-G 62.5/125; 3.0 dB/km
2800 m with F-K 200/230; 8.0 dB/km
1 m with F-K 200/230; 8.0 dB/km
±35%, maximum
< 6.25%
< 1 bit
RS-485//power supply
1.5 kVrms, 50 Hz, 1 min.
60 V DC/42 V AC, 1 A, maximum
Status and diagnostic indicators
Power supply (VCC), transmit/receive data RS-485,
fiber optic bar graph (FO SIGNAL), fiber optic error (FO ERR)
Housing material
PA V0, green
Ambient temperature
Operation
-20°C ... +60°C
Storage/transport
-40°C ... +85°C
Humidity
30% ... 95%, no condensation
Dimensions (W x H x D)
35 mm x 99 mm x 105 mm
Degree of protection
IP20
Weight
190 g, approximately
MTBF according to Telcordia standard
Termination devices (E)
T-couplers (T)
660 nm
850 nm
660 nm
850 nm
Ambient temperature 25°C
358 years
272 years
220 years
159 years
Ambient temperature 40°C
73 years
44 years
44 years
24 years
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PHOENIX CONTACT
4
PSI-MOS-RS485W2/FO…
General data (continued)
Chloroform test
Free from substances that would hinder coating with paint or varnish
(according to VW/Audi/Seat specification)
Vibration resistance
5g according to IEC 60068-2-6, 2.5 h each in x, y, and z direction, criterion A
Shock resistance
15g according to IEC 60068-2-27 with 11 ms pulse length, criterion C
Free fall
1 m without packaging according to IEC 60950
Air and creepage distances
DIN EN 60664-1/VDE 0110-1, DIN EN 50178, DIN EN 60950
Tests/approvals
UL/CUL 1604 Ex listed
u
PROCESS CONTROL EQUIPMENT FOR HAZARDOUS
LOCATIONS
31ZN
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c
U
CE
Ex
X II (2) GD [EX op is] IIC (PTB 06 ATEX 2042 u)
X II 3G Ex nAC IIC T4 X
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Fiber optic interface
Device
Criterion B2
EN 61000-4-2
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Electrostatic discharge (ESD)
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Conformance with EMC Directive 2004/108/EC and Low Voltage Directive 2006/95/EC
Noise immunity test according to EN 61000-6-21
Air discharge
Electromagnetic HF field
EN 61000-4-3
Amplitude modulation
EN 61000-4-4
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Fast transients (burst)
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Contact discharge
Signal
Power supply
EN 61000-4-5
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Surge current load (surge)
Signal
Power supply
Conducted interference
EN 61000-4-6
8 kV
6 kV
Criterion A3
10 V/m
Criterion B2
2 kV/5 kHz
2 kV/5 kHz
Criterion B2
1 kV/42 Ω
0.5 kV/2 Ω
Criterion A3
10 V
Noise emission of housing
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Noise emission test according to EN 61000-6-4
EN 550114
Class A5
EN 61000 corresponds to IEC 61000
2
Criterion B:
Temporary adverse effects on the operating behavior, which the device corrects automatically.
3
Criterion A:
Normal operating behavior within the specified limits.
4
EN 55011 corresponds to CISPR11
5
Class A:
101973_en_04
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Industrial application, without special installation measures.
PHOENIX CONTACT
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PSI-MOS-RS485W2/FO…
Block diagram
DC
24V (1)
COMBICON
0V (2)
TD
gn
DC
FO Line
SHD
PE
RD
rd
Retiming
11 (3)
Alarm
12 (4)
FO Port A
ERR A
Line Diagnostics Port A
(5)
CTRL
390 220 390
GND (6)
Function/
Data Rate
Bus Management
m
D(B) (7)
ye
Retiming
gn
Line Diagnostics Port B
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D(A) (8)
FO Line
Retiming
rd
TD
FO Port B*)
RD
s.
ERR B
DIN Rail Connector
Block diagram
Housing dimensions
105
*) Only for
PSI-MOS-RS485W2/FO...T
*) only
for PSI-MOS-RS485 W2/FO...T
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Figure 1
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24 V 0 V GND Data Data
B
A
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35
Figure 2
101973_en_04
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PSI-MOS-RS485W2/FO 660T
Ord. No. 27 08 300
VCC
TD
RD
RS485
TERM.
ON
FO
SIGNAL
ERR
A
ERR
B
101973A010
Housing dimensions (in mm)
PHOENIX CONTACT
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PSI-MOS-RS485W2/FO…
4
Safety regulations and installation notes
4.1
Installation and operation
4.2
Installation in zone 2
Follow the installation instructions.
WARNING: Explosion hazard
NOTE: Installation, operation, and maintenance
may only be carried out by qualified specialist
personnel.
The device is designed for installation in zone 2
potentially explosive areas.
Observe the specified conditions for use in potentially
explosive areas.
When installing and operating the device, the applicable
safety directives (including national safety directives),
accident prevention regulations, as well as general
technical regulations, must be observed.
WARNING: Explosion hazard
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Install the device in suitable housing with IP54
protection, minimum, that meets the
requirements of EN 60079-15.
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NOTE: The device must not be opened or
modified apart from the configuration of the DIP
switches.
Observe the requirements of EN 60079-14.
WARNING: Explosion hazard
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NOTE: The IP20 degree of protection
(IEC 60529/EN 60529) of the device is intended
for use in a clean and dry environment. The
device must not be subject to mechanical strain
and/or thermal loads, which exceed the limits
described.
Disconnect the block power supply before:
– Snapping it on or disconnecting it.
– Connecting or disconnecting cables.
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Do not repair the device yourself, replace it with an
equivalent device. Repairs may only be carried out by the
manufacturer.
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NOTE: The switches that can be accessed may
only be actuated when the power supply to the
device is disconnected.
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For the safety data, please refer to the operating instructions
and certificates (EC-type examination certificate, other
approvals, if necessary).
101973_en_04
WARNING: Explosion hazard
Only devices which are designed for operation in
zone 2 potentially explosive areas and are
suitable for the conditions at the installation
location may be connected to the supply and
signal circuits in zone 2.
WARNING: Explosion hazard
The device must be stopped and immediately
removed from the Ex area if it is damaged or was
subject to an impermissible load or stored
incorrectly or if it malfunctions.
Installation in areas with a danger of dust explosions
WARNING: Explosion hazard
The device is not designed for installation in
areas with a danger of dust explosions.
If dust is present, install the device in suitable,
approved housing.
PHOENIX CONTACT
7
PSI-MOS-RS485W2/FO…
5
Supported network structures
The PSI-MOS-RS485W2/FO… system can be used to
create network topologies that are ideally adapted to the
relevant application. The structures are described briefly
below.
Point-to-point connections
Two PSI-MOS-RS485W2/FO… E fiber optic termination
devices can be used to easily convert a data link from
copper cable to fiber optics.
Max. 31
T
If necessary, the point-to-point connection can also be
designed redundantly to increase availability using
PSI-MOS-RS485W2/FO… T T-couplers.
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FO
E
s.
Max. 31
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Point-to-point connection
Linear structures
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5.2
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PSI-MOS-RS485W2/FO… devices can be used to
network several RS-485 devices to form a linear structure.
PSI-MOS-RS485W2/FO… E termination devices are used
at the beginning and end of the fiber optic line.
T
Max. 31
Redundant point-to-point
connection
Max. 31
E
FO
Max. 31
T
FO
Max. 31
T
FO
Linear structure
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PSI-MOS-RS485W2/FO… T T-couplers with two fiber
optic ports are used along the line.
5.3
Max. 31
E
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5.1
Star structures
max. 31
RS-485 devices can also be networked in a star structure.
Depending on the number of star lines required, several
T-couplers or termination devices are connected to an
active star coupler.
T
101973_en_04
T
...
FO
Up to ten PSI-MOS-RS485W2/FO… devices can be
connected to each star coupler. Cross-wiring for RS-485
data and for the supply voltage is provided automatically by
the DIN rail connector (installation accessory, see page 3).
If increased availability is required, redundant star
distributors can also be created using
PSI-MOS-RS485W2/FO… T T-couplers.
T
T
T
T
max. 31 max. 31 max. 31
Star structure
Redundant star structure
PHOENIX CONTACT
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PSI-MOS-RS485W2/FO…
5.4
Tree structures
max. 31
Linear and star structures can be cascaded to create
complex tree structures, even in a redundant version if
required.
T
T
...
FO
The number of devices that can be cascaded is only limited
by the timing response (timeout) of the bus system used
due to the bit retiming of the PSI-MOS-RS485W2/FO…
fiber optic converter.
max. 31
T
T
max. 31
...
T
T
max. 31
T
...
T
...
max. 31
T
T
...
FO
Function elements
6
3
7
4
8
18
Figure 3
1
2
3
4
5
6
7
8
9
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VCC
TD
RD
RS485
TERM.
ON
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17
PSI-MOS-RS485W2/FO 660T
Ord. No. 27 08 300
FO
SIGNAL
ERR
A
ERR
B
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9
10
11
12
13
14
15
16
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5
2
"TD" LED
"RD" LED
Bus termination ON/OFF
"FO SIGNAL" LED (port A)
"FO SIGNAL" LED (port A)
"FO SIGNAL" LED (port A)
"ERR" LED (port A)
Fiber optic transmitter (port A)
Fiber optic receiver (port A)
"FO SIGNAL" LED (port B)1
"FO SIGNAL" LED (port B)1
"FO SIGNAL" LED (port B)1
"ERR" LED (port B)1
Fiber optic transmitter (port B)1
Fiber optic receiver (port B)1
s.
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
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6
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Tree structure
Diagnostic and status indicators
23
24
101973A011
Des.
VCC
Color
Green
TD
Yellow
RD
Green
Function elements
24 V DC supply voltage connection
0 V DC supply voltage connection
Switch contact, connection 11
Switch contact, connection 12
SHD, shield
GND, ground
D (B), transmit/receive positive
D (A), transmit/receive negative
"VCC" LED
101973_en_04
19
20
21
22
Green
FO SIGNAL Green
Yellow
ERR
1
Red
Meaning
Ready-to-operate
Sending data at the RS-485 copper
interface
Receiving data at the RS-485
copper interface
Very good
Receiving power
Good
at fiber optic port
Critical
A/B (see
Insufficient,
page 10)
broken fiber
Only for PSI-MOS-RS485W2/FO… T
PHOENIX CONTACT
9
PSI-MOS-RS485W2/FO…
Definition of fiber optic diagnostics
The quality of the path is determined using the incoming
optical power Popt and displayed using the LED bar graph.
Critical
Red
Error
Basic method of operation
Popt is still greater than the
system reserve
Popt has reached the system
reserve
Popt has sapped the system
reserve/broken fiber
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The PSI-MOS device has a maximum of four interfaces for
the RS-485 signal: the electrical interface (COMBICON),
the two fiber optic ports (port B only for T-couplers), and the
DIN rail connector.
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00
11
01
om
01011000110100100110
T-BUS
11
01
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11
01
00
Echo evaluation is used to detect broken fibers for the
devices. During the idle phase (rest period between
transmitting data), the fiber optics between directly
connected devices are monitored for broken fibers.
In the event of a broken fiber, the affected optical fiber is
switched off, the error LED is set (16 in Figure 3 on page 9),
and the switching output is activated.
00
0
11
COMBICON
0
11
00100110
If DIP 7 is set to "ON" (NORM), the echo evaluation
(DIP 6 = "OFF") is available as diagnostics (see "Connection
to fiber optic interfaces from third-party suppliers (DIP 6/7)"
on page 12).
010
010
Echo evaluation
010110001
In "Redundant ring" mode, the affected fiber optic port is
already switched off when the LED goes to yellow.
Fiber optic
ne
As soon as the system reserve is reached, only the yellow
LED remains lit. At the same time, the signaling relay drops
and the switch contact opens. Data communication is still
possible.
All interfaces communicate with one another with equal
rights. A signal available at one of the interfaces is also
available at all other interfaces.
11
01
Yellow
Good
0
11
010
Popt is considerably greater
than the system reserve
s.
Very good
nt
Optical power Popt
00
Receive
status
0
11
LED bar
graph
Green
Green
Yellow
Green
Yellow
DIP 6
DIP 7
Meaning
Not
OFF
Continuous fiber optic diagnostics,
relevant ("INVERS")
broken fiber detection disabled
ON
Continuous fiber optic diagnostics,
OFF
(NORM)
broken fiber detection active
Continuous fiber optic diagnostics
ON
ON
and broken fiber detection disabled.
(MIXED) (NORM)
Diagnostics are no longer available.
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DIP 7 = "OFF" is used to switch the transmitters in the idle
state (rest period between transmitting data) to steady light
(INVERS), to enable continuous fiber optic diagnostics.
010
7
Fiber optic
101972B012
Figure 4
Communication between the interfaces
If the default setting for DIP 7 = "OFF" (INVERS) is used,
echo evaluation is switched off because the built-in
diagnostics (FO signal) permanently evaluates the received
signal and therefore also detects a broken fiber.
If echo evaluation is also switched off (DIP 6 = "ON"), fiber
optic diagnostics are not available.
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PHOENIX CONTACT
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PSI-MOS-RS485W2/FO…
8
The following tables provide an overview of the DIP switch
functions. By default upon delivery, all DIP switches are in
the "OFF" position.
Configuration
NOTE: Electrostatic discharge
The device contains components that can be
damaged or destroyed by electrostatic discharge.
When handling the device, observe the
necessary safety precautions against
electrostatic discharge (ESD) according to
EN 61340-5-1.
NOTE: After changing the device settings,
disconnect the power to the device so that the
settings can be applied.
8.1
Setting the transmission speed
The transmission speed is set using DIP switches 1 to 4.
NOTE: Set all fiber optic converters and all
connected RS-485 devices to the same
transmission speed.
Transmission
speed
500 kbps
375 kbps
187.5 kbps
136 kbps
115.2 kbps
93.75 kbps
75 kbps
57.6 kbps
38.4 kbps
19.2 kbps
9.6 kbps
4.8 kbps
nt
s.
A
m
•
For configuration, release the housing cover using a
screwdriver (A in Figure 5).
Then carefully pull the PCB out of the housing as far as
possible (B).
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•
po
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B
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A
101973A001
Opening the housing
in
ec
Figure 5
1
P
DI
2
3
4
on
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DIP switches 1 to 10 are then freely accessible.
•
Configure the DIP switches according to the planned
application.
5
6
7
10
9
8 ON
DIP switch
5
6
7
81
92
102
8.2
1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
DIP switch
2
3
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
10 BIT
MIXED
NORM
REDUNDANCY
END
N.C.
4
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
11 BIT
–
INVERS
–
NEXT
1
No function for PSI-MOS-RS485W2/FO… E termination devices.
2
Not available for PSI-MOS-RS485W2/FO… E termination devices.
10/11-bit selection (DIP 5)
S1...S10
Please always observe the UART character word
length specified by the control system
manufacturer.
101973A002
Figure 6
101973_en_04
The standard word length of a UART character is 11 bits.
However, some bus systems, e.g., Modbus in ASCII mode,
transmit 10-bit word lengths.
Setting the DIP switches
PHOENIX CONTACT
11
PSI-MOS-RS485W2/FO…
•
Set DIP switch 5 to "ON" ("10 BIT") (default setting:
"OFF").
If operating Modbus in RTU mode, leave DIP switch 5 set to
"OFF" ("11 BIT").
When the redundancy function is enabled, data
communication takes place via fiber optic port A by default.
In the event that the signal level of the standard cable drops
to a critical level, it automatically switches to port B.
When used with the Inline multiplexer system, select a word
length of 11 bits and 75 kbps.
Connection to fiber optic interfaces from thirdparty suppliers (DIP 6/7)
1
Default setting
in
ec
NOTE: If DIP 7 is set to "ON", fiber optic
diagnostics are not available via the LED bar
graph.
on
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The LED bar graph can light up at high
transmission speeds or flash at low transmission
speeds. This display does not correspond to
continuous evaluation of the optical power.
NOTE: When connecting third-party devices,
observe the receiver sensitivity and overrange of
the fiber optic interfaces.
8.4
Activating the redundancy function (DIP 8)
For increased availability, redundant fiber optic connections
can be created using T-couplers. In this case, the
redundancy function must be activated at the start and end
of the redundant fiber optic connection.
•
To do this, set DIP switch 8 (REDUNDANCY) to "ON".
101973_en_04
m
s.
8.7
Mixed operation of PSI-MOS and PSM-EG
Mixed operation of the old PSM-EG series with the new
PSI-MOS series is generally possible. Please note the
following settings and restrictions:
ne
Meaning
Logic 1
Logic 1
Switch with no function (DIP 10)
This switch has no function at present and is reserved for
later function extensions.
om
DIP 7
Idle setting
OFF = INVERS Light on1
ON = NORM
Light off
Disabling the second fiber optic port (DIP 9)
If the second fiber optic port (B) is not used for
PSI-MOS-RS485W2/FO… T T-couplers, it must be
disabled. Otherwise the red "ERR" LED will light up.
• Set DIP 9 to "ON" (END).
8.6
po
For mixed operation of PSI-MOS with fiber optic interfaces
from other manufacturers, proceed as follows.
•
Deactivate echo evaluation.
Set DIP 6 to "ON".
•
Check the idle setting for the third-party interface:
Logic 1 = Light off
Logic 1 = Light on
•
If necessary, adjust the idle setting of PSI-MOS using
DIP 7.
8.5
co
During the idle phase, fiber optic interfaces return to an idle
setting defined by the manufacturer. This idle setting may
vary for different manufacturers and devices. As fiber optic
interfaces can only be operated together if they have the
same idle setting, this should be set using the DIP switches.
nt
8.3
NOTE: Always connect redundant fiber optic
connections from fiber optic port A to port A of the
opposite device or from port B to port B of the
opposite device.
Device configuration
The DIP switch settings depend on the application
requirements. Please note that the idle setting of all devices
used in the entire system must be the same (can be set via
DIP switches) and that the data rate set on all devices is the
same.
Overload/underload capability of fiber optic interfaces
In rare cases (usually in the case of very short fiber optic
connections of just a few meters), an overload of the
PSI-MOS devices may occur in mixed operation. This is due
to the highly sensitive PSI-MOS receivers, which cover
large ranges but can be overloaded on short fiber optic
paths.
In the event of an overload, a patch cable with fiber optic
joint can be used to increase the attenuation of the path,
which will ensure error-free operation.
In mixed operation, observe the following ranges:
Fiber
Glass 50/125
Glass 62.5/125
HCS
POF
Wavelength
Maximum range
850 nm
1600 m
850 nm
2200 m
Not permissible for PSM-EG
660 nm
70 m
PHOENIX CONTACT
12
PSI-MOS-RS485W2/FO…
9.1
WARNING: Only mount and remove devices
when the power supply is disconnected.
•
WARNING: PSI-MOS-... devices are designed
for SELV operation according to
IEC 60950/EN 60950/VDE 0805.
•
Install the device on a 35 mm DIN rail according to
DIN EN 60715.
To avoid contact resistance only use clean, corrosionfree DIN rails.
End clamps can be mounted on both sides of the device
to stop the devices from slipping on the DIN rail (for
ordering data, see page 3).
WARNING: Connect the DIN rail to protective
earth ground using a grounding terminal block.
The devices are grounded when they are
snapped onto the DIN rail (installation according
to PELV).
•
ne
nt
A
B
C
101973A003
Figure 7
Combined assembly
on
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in
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This ensures that the shielding is effective.
Connect protective earth ground with low
impedance.
•
Connect together the required number of DIN rail
connectors for the connection station. Two DIN rail
connectors are required for each device (see A in
Figure 7). A maximum of ten devices are permitted in a
connection station.
Push the connected DIN rail connectors onto the DIN
rail (B and C).
Place the device onto the DIN rail from above. The
upper holding keyway of the device must be hooked
onto the top edge of the DIN rail (see Figure 7). Make
sure that it is aligned correctly with the DIN rail
connectors.
Once the device has been snapped on properly, check
that it is fixed securely on the DIN rail.
m
•
•
Combined assembly with a system power
supply unit (modular star coupler)
co
Connection notes
s.
9
101973_en_04
PHOENIX CONTACT
13
PSI-MOS-RS485W2/FO…
9.2
Assembly as an individual device in the control
cabinet (stand-alone)
9.3
Assembly in potentially explosive areas
WARNING: Observe the safety notes on page 7.
•
•
•
Place the device onto the DIN rail from above. The
upper holding keyway of the device must be hooked
onto the top edge of the DIN rail (see Figure 8).
Push the device from the front towards the mounting
surface.
Once the device has been snapped on properly, check
that it is fixed securely on the DIN rail.
–
s.
co
m
–
Areas with a danger of gas explosions
The devices are suitable for use in zone 2. Devices that
are installed in zone 1 cannot be connected to the fiber
optic interface. The fiber optic interface is an associated
item of equipment with protection type "Ex op is".
Areas with a danger of dust explosions
The device is not designed for installation in areas with
a danger of dust explosions.
If dust is present, install the device in suitable, approved
housing.
When installed outside areas with a danger of dust
explosions, devices installed in zone 22 or 21 can also
be connected to the fiber optic interface.
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101973A004
Assembly in the control cabinet
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Figure 8
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on
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Gas-safe area
PSI-MOS-RS485W2/FO 660T
Ord. No. 27 08 300
PSI-MOS-RS485W2/FO 660T
Ord. No. 27 08 300
VCC
TD
RD
VCC
TD
RS485
TERM.
ON
RD
FO
SIGNAL
ERR
A
RS485
TERM.
ON
FO
SIGNAL
ERR
B
ERR
A
FO
ERR
B
FO
Ex op is
X II 2G
[Ex op is]
X II (2)G
[Ex op is]
X II (2)G
Zone 21
Zone 22
Dust-safe area
PSI-MOS-RS485W2/FO 660T
Ord. No. 27 08 300
VCC
TD
RD
RS485
TERM.
ON
FO
SIGNAL
ERR
A
FO
Ex op is
X II 2D
ERR
B
FO
Ex op is
X II 3D
[Ex op is]
X II (2)D
101973A013
9.4
•
•
•
•
101973_en_04
Zone 2
nt
Zone 1
Removal
Pull the locking latch down using a screwdriver, needlenose pliers or similar.
Pull the bottom edge of the module away from the
mounting surface.
Pull the module diagonally upwards away from the DIN
rail.
If removing a complete star distributor, remove the DIN
rail connectors from the DIN rail as well.
PHOENIX CONTACT
14
PSI-MOS-RS485W2/FO…
10
Cabling notes
10.1
Connecting the supply voltage
10.2
Connecting the data cables/bus termination
NOTE: Use shielded twisted pair data cables.
Connect the cable shielding at both ends of the
transmission path.
WARNING: The device is operated with a +24 V
DC SELV.
Redundant
supply
0V
24 V
0V
24 V
0V
m
24 V
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Individual
supply
SHD GND D(B) D(A)
Individual/redundant supply
nt
Figure 9
s.
102964A006
Operation in a star coupler topology
po
Supply the supply voltage to the module via terminal
blocks 1 (24 V) and 2 (0 V).
ne
Operation as an individual device
in
ec
om
When the devices are operated in a star coupler topology,
the supply voltage must only be supplied to the first device
in the station. The remaining devices are supplied via the
DIN rail connector. A redundant supply concept can be
created by connecting a second power supply unit to
another device in the topology.
101973A005
Figure 10
•
•
Connecting the data cables
Connect the data cables and the data cable shield to
the corresponding contacts on the COMBICON
connector. For optimum shield connection use the
terminal clamp provided.
If the fiber optic converter is located at the start or end
of an electrical RS-485 segment, activate termination
on the top of the device (12 in Figure 3 on page 9).
Using the MINI POWER system power supply unit
on
l
As an alternative, the star coupler topology can also be
supplied using the
MINI-SYS-PS 100-240AC/24DC/1.5 (Order No. 2866983)
or MINI-PS-100-240AC/24DC/1.5/EX (Order No. 2866653)
system power supply unit. It is connected via two DIN rail
connectors.
Usually the system power supply unit is mounted as the first
device in a topology. A second power supply unit can be
used to create a redundant supply concept.
101973_en_04
NOTE: The maximum length of the RS-485
cables depends on the transmission speed. The
values listed in the table must not be exceeded.
Transmission speed
[kbps]
≤ 93.75
≤ 500
Maximum range [m]
1200
400
PHOENIX CONTACT
15
PSI-MOS-RS485W2/FO…
10.3
Wiring the switch contact
PSI-MOS-RS485W2/FO… converters are equipped with a
floating switch contact for error diagnostics (connection
terminal blocks 3 and 4 in Figure 3 on page 9). This contact
opens on the affected device if:
– The supply voltage fails
– An interrupt is detected on the fiber optic path
– The system reserve for the fiber optic path is not
reached
m
The switch contact is an N/C contact and can be connected
to a local digital input, e.g., on the PLC, to support error
detection.
s.
co
When using a device topology (modular star coupler), the
individual contacts can be connected to separate input
points or the individual contacts can be looped to generate
a group message (Figure 11).
24 V DC
nt
NOTE: The maximum load capacity of the relay
contact is 60 V DC/42 V AC, 1 A.
Individual message
Group message
Individual and group message
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Figure 11
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101973A006
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24 V DC
101973_en_04
PHOENIX CONTACT
16
PSI-MOS-RS485W2/FO…
10.4
B-FOC (ST®) connection
(PSI-MOS-RS485W2/FO 850 ...)
Connecting the fiber optic cables
WARNING: Risk of eye injury
Standardized B-FOC (ST®) connectors are used with
PSI-MOS-RS485W2/FO 850 ... devices.
During operation, do not look directly into
transmitter diodes or use visual aids to look into
the glass fibers.
The infrared light is not visible.
NOTE: Dust protection caps should only be
removed just before the connectors are
connected. They prevent contamination of the
transmit and receive elements.
2
The same applies for the protective caps on the
connectors.
•
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Measuring and connecting devices
po
PSI-MOS-RS485W2/FO 850 ...
–
2800 m with F-K 200/230; 8 dB/km
–
4200 m with F-G 50/125; 2.5 dB/km
–
4200 m with F-G 62.5/125; 3.0 dB/km
s.
PSI-MOS-RS485W2/FO 660 ...
–
100 m with F-P 980/1000; 230 dB/km
–
800 m with F-K 200/230; 10 dB/km
Connect the fiber optic cable to the B-FOC (ST®)
connector for the transmit and receive channel and
push the connector clamp mechanism downwards.
Secure the connection with a quarter turn to the right
(see 2 in Figure 13).
nt
•
B-FOC connection
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Figure 13
NOTE: The following fiber optic lengths must
not be exceeded:
m
1
om
NOTE: When using fiber optics, observe the fiber
optic installation guidelines,
DB GB IBS SYS FOC ASSEMBLY
(Order No. 9393909).
Due to the integrated optical diagnostics, there is no need to
measure the path.
NOTE: Note the fiber optic cable signal direction
when coupling two PSI-MOS devices:
Device 1 fiber connection "TD" (transmitter) to
device 2 fiber connection "RD" (receiver)
(Figure 14).
in
ec
F-SMA connection (PSI-MOS-RS485W2/FO 660 ...)
on
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PSI-MOS-RS485W2/FO 660 ... devices use F-SMA
connectors for the fiber optic connection. F-SMA is a
standardized fiber optic connection.
NOTE: Due to different operating wavelengths,
PSI-MOS-RS485W2/FO 660 ...,
PSI-MOS-RS485W2/FO 850 ..., and
PSI-MOS-RS485W2/FO 1300 E
devices should not be connected directly with one
another via fiber optic cables.
2
1
Figure 12
•
F-SMA connection
The connectors are secured on the device by manually
tightening the screw collar (see 2 in Figure 12).
101973A009
Figure 14
101973_en_04
Crossed cables
PHOENIX CONTACT
17
PSI-MOS-RS485W2/FO…
11
Signal delay
Data transmission cables and network components lead to
signal delays. This may also have to be taken into
consideration when setting the timeout of the bus system
used.
The signal delay dT can be calculated as follows:
dT = b x L + 2 x N
Where:
m
b=
L=
N=
Signal delay in bit periods for one complete signal
cycle
Length parameter (see table)
Network expansion in km
Number of fiber optic converters
Length parameter b
co
dT =
Transmission speed
[kbps]
500
300
187.5
136
115.2
93.75
75
57.6
38.4
19.2
9.6
4.8
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in
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s.
If necessary, adjust the timeout of your bus system to the
signal delay.
5.00
3.00
1.88
1.36
1.16
0.94
0.75
0.58
0.38
0.19
0.10
0.05
101973_en_04
PHOENIX CONTACT GmbH & Co. KG • 32823 Blomberg • Germany • Phone: +49 - 52 35 - 30 0
PHOENIX CONTACT • P.O.Box 4100 • Harrisburg • PA 17111-0100 • USA • Phone: +717-944-1300
www.phoenixcontact.com
18
