MACX MCR-EX-SL-2NAM-T(-SP)
NAMUR signal conditioner, Ex-i,
2-channel, with transistor output
Data sheet
103753_en_00
1
© PHOENIX CONTACT 2014-08-19
Description
The 2-channel NAMUR signal conditioner
MACX MCR-EX-SL-2NAM-T(-SP) has been designed for
intrinsically safe operation of proximity sensors (as per
EN 60947-5-6 (NAMUR)) as well as switch contacts, with
open circuit and resistance circuits, installed in hazardous
areas.
The input circuits are monitored for line faults such as wire
breaks and short circuits. Line fault detection (LFD) can be
activated and deactivated. Errors are indicated by a red
flashing LED (as per NAMUR NE 44) and the corresponding
transistor output is blocked. Error messages can also be
transmitted to the supply and error evaluation module via
the DIN rail connector.
The output circuits feature one passive transistor for each
channel for the transmission of the switching signal to the
control level. The switches make it possible to set the
direction separately for every channel (open or closed
circuit current behavior). The status of the respective
channel is signaled via a yellow LED.
1.1
–
–
–
–
–
–
–
–
–
–
–
Properties
Two-channel
Intrinsically safe input for NAMUR proximity switches or
contacts, [Ex ia]
Transistor output, (passive), up to 5 kHz
Line fault detection (LFD)
Option of phase reversal
Safe 3-way electrical isolation
SIL 2 acc. to IEC/EN 61508
Installation in zone 2 permitted
Power supply and error indication possible via DIN rail
connector
Plug-in terminals with screw connection
(MACX MCR-EX-SL-2NAM-T)
or spring connection (push-in)
(MACX MCR-EX-SL-2NAM-T-SP)
Housing overall width 12.5 mm
Certified for safety-related applications up to SIL 2
according to IEC/EN 61508.
WARNING: Explosion hazard
The module is an item of associated electrical equipment for intrinsically safe circuits. It is designed for
use in zone 2, if specific conditions are observed.
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
Observe the safety regulations and installation notes on page 6.
Make sure you always use the latest documentation.
It can be downloaded at phoenixcontact.net/products.
This data sheet is valid for all products listed on page 3.
MACX MCR-EX-SL-2NAM-T(-SP)
Table of contents
1
Description.................................................................................................................................. 1
1.1
Properties....................................................................................................................................................... 1
2
Ordering data.............................................................................................................................. 3
3
Technical Data............................................................................................................................ 3
4
Safety regulations and installation notes..................................................................................... 6
4.1
4.2
4.3
4.4
4.5
5
Installation .................................................................................................................................. 7
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
6
Installation notes ............................................................................................................................................ 6
Intrinsic safety ................................................................................................................................................ 6
Installation in the hazardous area (zone 2) ..................................................................................................... 6
Areas with a danger of dust explosions .......................................................................................................... 6
Safety-related applications (SIL) .................................................................................................................... 6
Connection notes .......................................................................................................................................... 7
Electrostatic discharge ................................................................................................................................... 7
Design ............................................................................................................................................................ 7
Basic circuit diagram ...................................................................................................................................... 8
Inputs (intrinsically safe) ................................................................................................................................. 8
Outputs........................................................................................................................................................... 8
Supply voltage................................................................................................................................................ 8
Dimensions .................................................................................................................................................... 9
Assembly........................................................................................................................................................ 9
Connecting the cables.................................................................................................................................. 10
Group error message ................................................................................................................................... 10
Startup.......................................................................................................................................................... 10
Configuration .............................................................................................................................11
6.1
6.2
6.3
Line fault detection (switch DIP2/DIP4) ........................................................................................................ 11
Phase reversal (switch DIP1/DIP3)............................................................................................................... 11
Truth table ................................................................................................................................................... 12
7
Comparison of safety data .........................................................................................................13
8
Safety-related applications (SIL 2).............................................................................................14
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
8.14
8.15
103753_en_00
Circuits ......................................................................................................................................................... 14
Diagnostics function via the switches DIP2/DIP4.......................................................................................... 14
Safe state ..................................................................................................................................................... 14
Response Times .......................................................................................................................................... 14
Operating mode of the safety function.......................................................................................................... 14
Failure behavior and required response ....................................................................................................... 14
Safety integrity requirements........................................................................................................................ 15
Conditions .................................................................................................................................................... 15
Installation and Startup................................................................................................................................. 16
Notes on operation ....................................................................................................................................... 16
Startup and restart........................................................................................................................................ 16
Recurring checks ......................................................................................................................................... 16
Repair........................................................................................................................................................... 17
Standards (SIL 2) ......................................................................................................................................... 17
Abbreviations ............................................................................................................................................... 18
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2
MACX MCR-EX-SL-2NAM-T(-SP)
2
Ordering data
NAMUR signal conditioner
Description
Type
Order no.
NAMUR signal conditioner, Ex-i, 2-channel, with screw connection
MACX MCR-EX-SL-2NAM-T
2865489
1
NAMUR signal conditioner, Ex-i, 2-channel, with spring connection
MACX MCR-EX-SL-2NAM-T-SP
2924090
1
Accessories
Description
Type
Order no.
Pcs. / Pkt.
ME 6.2 TBUS-2 1.5/5-ST-3.81 GN
2869728
10
MACX MCR-PTB
MACX MCR-PTB-SP
2865625
2924184
1
1
DIN rail connector (T-BUS), 5-pos., for bridging the supply voltage, can be
snapped onto NS 35 DIN rail in acc. with EN 60715
Pcs. / Pkt.
Power and error evaluation module, including the corresponding DIN rail
connector ME 17.5 TBUS 1.5/5-ST-3.81 GN
Screw connection
spring connection
For additional accessories, please refer to the catalog from Phoenix Contact.
3
Technical Data
Input
Input
Intrinsically safe, designed for protection type Ex-i [Ex ia] IIC/IIIC
Available input sources
–
–
CAT II (250 V against 6)
–
NAMUR proximity switches according to EN 60947-5-6 or
Switch contacts with open circuit
(not for safety-related applications, SIL 2) or
Switch contacts with resistance circuit
Switching hysteresis
Approx. 0.2 mA
Off-load voltage
8 V DC ±10%
Switching points in acc. with IEC/EN 60947-5-6
I < 1.2 mA (blocking)
Line fault detection
Break 0.05 mA < IIN < 0.35 mA
I > 2.1 mA (conductive)
Short circuit 100 < RSensor < 360
Activated/Deactivated by DIP switches
Switching output
Switching output
1 Transistor, passive (per channel)
Maximum switching voltage
30 V DC
CAT II (250 V against 6)
Minimum switching voltage
3 V DC
Maximum switching current
50 mA, short-circuit-proof
Minimum switching current
5 mA, short-circuit-proof
Drop (ΔU)
< 1.4 V
Switching behavior
Can be inverted by DIP switches
Switching frequency
5 kHz
General data
Supply voltage range
19.2 V DC ... 30 V DC (24 V DC -20% ... +25%)
Current consumption
< 34 mA (24 V DC)
Power dissipation
1W
Status indicator
Green LED (PWR, supply voltage)
Red LED (LE, line fault)
Yellow LED (OUT, switching state)
Housing material
103753_en_00
Polyamide PA 66-FR
PHOENIX CONTACT
3
MACX MCR-EX-SL-2NAM-T(-SP)
General data (continued)
Color
Green
Degree of protection
IP20
Width x height x depth
12.5 mm x 112.5 mm 114.5 x mm (MACX MCR-EX-SL-2NAM-T)
Inflammability class according to UL 94
0V
Design
Terminal housing for mounting on DIN rails
12.5 mm x 116 mm 114.5 x mm (MACX MCR-EX-SL-2NAM-T-SP)
Electrical isolation
Input/Output
375 Vpeak (peak value acc. to EN 60079-11)
Input/Power supply, DIN rail connector
375 Vpeak (peak value acc. to EN 60079-11)
Input/Output/Power supply, DIN rail connector
300 Veff rated insulation voltage
(Surge voltage category II, pollution degree 2,
safe electrical isolation as per EN 61010-1)
Test voltage 2.5 kV AC (50 Hz, 1 min)
Output 1 / Output 2
50 Veff rated insulation voltage
(surge voltage category II, pollution degree 2,
basic insulation acc. to EN 61010-1)
Test voltage 1.0 kV AC (50 Hz, 1 min)
Ambient conditions
Ambient temperature
Operation
-20 °C ... +60 °C (any mounting position)
Storage/Transport
-40 °C ... +80 °C
Permissible humidity (operation)
10% ... 95% (non-condensing)
Maximum altitude
2000 m above sea level
Connection data
MACX MCR-EX-SL-2NAM-T
MACX MCR-EX-SL-2NAM-T-SP
Connection method
Screw connection
Push-in spring connection
Conductor cross-section
solid
0.2 mm2 ... 2.5 mm2
2
0.2 mm2 ... 1.5 mm2
2
0.2 mm2 ... 1.5 mm2
flexible
0.2 mm ... 2.5 mm
AWG/kcmil
24 ... 14
24 ... 16
Stripping length
7 mm
8 mm
Tightening torque
0.5 Nm ... 0.6 Nm
–
Conformance
EMC Directive 2004/108/EC
EN 61000-6-2, EN 61000-6-4, EN 61326-1
Ex Directive (ATEX)
EN 60079-0, EN 60079-11, EN 60079-15
Safety data according to ATEX for intrinsically safe circuits
Voltage, maximum Vo
9.6 V
Maximum current Io
10.3 mA
Maximum power Po
25 mW
Maximum inner inductance Li
negligible
Maximum inner capacity Ci
11 nF
Gas group
IIC
IIB
Maximum external inductance Lo
100 mH
5 mH
1 mH
10 µH
100 mH
5 mH
1 mH
10 µH
Maximum external capacitance Co
510 nF
840 nF
1.2 µF
3.6 µF
2.7 µF
4.4 µF
6.3 µF
26 µF
Safety-related maximum voltage Vm
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253 V AC (125 V DC)
PHOENIX CONTACT
4
MACX MCR-EX-SL-2NAM-T(-SP)
Approvals
ATEX
IBExU 08 ATEX 1100 II (1) G [Ex ia Ga] IIC
II (1) D [Ex ia Da] IIIC
II 3 G Ex nA IIC T4 Gc X
IECEx approval
IECEx IBE 08.0005X [Ex ia Ga] IIC
[Ex ia Da] IIIC
Ex nA IIC T4 Gc
UL, USA/Canada
, C.D.-No 83104549; IS for Class I,II,III, Division 1 and Zone 0; Installation
in Class I, Division 2 and Zone 2
Functional safety (SIL)
SIL 2 according to IEC/EN 61508
103753_en_00
PHOENIX CONTACT
5
MACX MCR-EX-SL-2NAM-T(-SP)
4
Safety regulations and installation notes
4.1
Installation notes
–
–
–
–
4.2
–
The device is an item of associated equipment
(category 1) with “intrinsic safety” protection type and
can be installed in zone 2 potentially explosive areas as
a category 3 device.
It meets the requirements of
EN 60079-0:2012, IEC 60079-0 Ed. 6.0,
EN 60079-11:2012, IEC 60079-11 Ed. 6.0
EN 60079-15:2010, IEC 60079-15 Ed. 4.0
Installation, operation, and maintenance may only be
carried out by qualified electricians.
Follow the installation instructions as described.
When installing and operating the device, the
applicable regulations and safety directives (including
national safety directives), as well as general technical
regulations, must be observed.
For the safety data, refer to this document and the
certificates (EC examination certificate and other
approvals if appropriate).
Do not open or modify the device. Do not repair the
device yourself; replace it with an equivalent device
instead. Repairs may only be carried out by the
manufacturer.
The IP20 degree of protection (EN/IEC 60529) of the
device is intended for use in a clean and dry
environment. Do not subject the device to mechanical
or thermal loads that exceed the specified limits.
The device complies with the EMC regulations for
industrial areas (EMC class A). When using the device
in residential areas, it may cause radio interference.
–
–
4.3
–
–
–
–
4.4
–
–
Intrinsic safety
The device is approved for intrinsically safe (protection
type Ex i) circuits up to zone 0 (gas) and zone 20 (dust)
in the hazardous area.
Observe the safety values for intrinsically safe
equipment and the connecting cables during
connection (IEC/EN 60079-14). They must conform to
the values specified in the installation manual, in this
data sheet, or the EC-type examination certificate.
–
4.5
When carrying out measurements on the intrinsically
safe side, observe the relevant regulations regarding
the connection of intrinsically safe equipment. In
intrinsically safe circuits, only use those measuring
devices that are approved for these circuits.
If the device has been used in non-intrinsically safe
circuits, it must not be used again in intrinsically safe
circuits. The device must be clearly marked as nonintrinsically safe.
Installation in the hazardous area (zone 2)
Observe the specified conditions for use in potentially
explosive areas!
Install the device in a suitable approved housing (with at
least IP54 degree of protection) that meets the
requirements of EN 60079-15. Observe the
requirements of EN 60079-14.
Always disconnect the power before connecting or
disconnecting non-intrinsically safe cables.
In potentially explosive areas, always disconnect the
power before snapping the device on or off the DIN rail
connector.
The device must be stopped and immediately removed
from the hazardous area if it is damaged or was
subjected to an impermissible load or stored incorrectly
or if it malfunctions.
Areas with a danger of dust explosions
The device is not designed for installation in zone 22.
If, however, you wish to use the device in zone 22, it
must be installed in a housing that complies with
IEC/EN 60079-31. In doing so, observe the maximum
surface temperatures. Observe the requirements of
IEC/EN 60079-14.
Connection to the intrinsically safe circuit in areas with
a danger of dust explosions (Zone 20, 21 or 22) is only
permitted if the equipment connected to this circuit is
approved for this zone (e.g. Category 1D, 2D or 3D).
Safety-related applications (SIL)
When using in safety-related applications, observe the
instructions in Section 8, as the requirements differ for
safety-related functions.
103753_en_00
PHOENIX CONTACT
6
MACX MCR-EX-SL-2NAM-T(-SP)
5.1
Connection notes
5.2
Electrostatic discharge
NOTE: Electrostatic discharge!
WARNING: Electrical danger due to improper
installation
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 and IEC 61340-5-1.
Observe the connection notes for safe installation
in accordance with EN/UL 61010-1:
–
–
–
–
–
–
–
–
Near the device, provide a switch/circuit breaker that is
labeled as the disconnect device for this device (or
the entire control cabinet).
Provide overcurrent safety equipment (I 16 A) in
the installation.
To protect the device against mechanical or electrical
damage, install it in a suitable housing with an
appropriate degree of protection according to
IEC 60529.
If several devices are installed next to each other,
make sure that the device has a housing that features a
basic insulation for 300 Veff. Install additional insulation,
if necessary. If the neighboring device is equipped with
basic insulation, no additional insulation is required.
The voltages present at the input, output, and supply
are extra-low voltages (ELV). Depending on the
application, hazardous voltage (> 30 V AC) to ground
may occur. For this event, safe electrical isolation from
the other connections has been implemented.
Before performing any servicing or maintenance
work, ensure that the device is disconnected from all
effective power sources.
Always disconnect the device from the power before
switching the DIP switches.
If the device is not used as described in the
documentation, the intended protection may be
impaired.
103753_en_00
5.3
Design
1
1.1
1.2
1.1
2.2
2.1
9
2.1
3.1
3.2
R
PW
1
LF
2
LF
T1
OU
T2
OU 1
2
3
4 II
I
4.2
4.1 5.2
5.1
Figure 1
2.2
3.1
1.2
1.1 2.2
2.1 3.2
3.1
8
1
1.2
3.2
1.2
1.1 2.2
2.1 3.2
3.1
R
PW
1
LF
2
LF
T1
OU
MACX MCR-EX-SL-2NAM-T-SP
Installation
MACX MCR-EX-SL-2NAM-T
5
2
3
4
5
6
7
T2
OU 1
2
3
4 II
I
4.2
4.1 5.2
5.1
Design MACX MCR-EX-SL-2NAM-T(-SP)
1 Plug-in COMBICON screw or push-in connectors with
integrated test sockets
2 LED PWR green
Supply voltage
3 LED LF1
red
Line fault, sensor cable 1
4 LED LF2
red
Line fault, sensor cable 2
5 LED OUT1 yellow Switching state, transistor output
channel 1
6 LED OUT2 yellow Switching state, transistor output
channel 2
7 Switch DIP1 ... DIP4
8 Snap-on foot for fixing to the DIN rail
9 Connection option for DIN rail connector
PHOENIX CONTACT
7
MACX MCR-EX-SL-2NAM-T(-SP)
5.4
Basic circuit diagram
5.7
OUT
IN
Sensor / Field
PLC / DCS
Supply voltage
The modules can be supplied with voltage via the
connection terminals as well as via the DIN rail connector.
DI
+
CH1
+
4.2
3.2
3.2
-
3.1
3.1
+
2.2
2.2
-
2.1
2.1
+
Supply via connection terminals
CH1
4.1
The supply voltage is fed in through the connection
terminals 1.1 (+) and 1.2 (-).
CH2
+
5.2
CH2
5.1
Faultsignal
+
+
GND
+24V
Supply via DIN rail connector
The supply voltage can be fed in via an MACX MCR-EX-SL
module or via the power and fault signaling module
MACX MCR-PTB(-SP) to the DIN rail connector.
1.2
1.1
NOTE: Never connect the supply voltage directly
to the DIN rail connector.
Drawing power from the DIN rail connector is not
permitted.
Power
LFD +24V
GND
Zone 0,1,2
Zone 20,21,22
Zone 2
Div. 2
Div. 1,2
Figure 2
5.5
Basic circuit diagram with connection
terminals
–
Inputs (intrinsically safe)
Connection of NAMUR proximity switches or (resistance)
switch contacts
Channel 1
Channel 2
5.6
Terminals 4.1 (+) and 4.2 (-)
Terminals 5.1 (+) and 5.2 (-)
Outputs
One passive transistor each
Channel 1
Channel 2
103753_en_00
Terminals 3.1 (+) and 3.2 (-)
Terminals 2.1 (+) and 2.2 (-)
–
Supply via an MACX MCR-EX-SL module
If the total current consumption of the modules in series
does not exceed 400 mA, power can be supplied
directly at the connection terminals of the module.
Up to 16 modules can be supplied depending on the
current consumption of the modules.
We recommend connecting a 630 mA fuse (normalblow or slow-blow) upstream.
Supply via the power and fault signaling module
MACX MCR-PTB(-SP)
The supply voltage is supplied via the
MACX MCR-PTB(-SP) module to the DIN rail
connector.
Simple or redundant diode-decoupled power supply is
possible.
The MACX MCR-PTB(-SP) module is protected by a
fuse. Depending on the current consumption of the
modules, up to 150 individual modules can be supplied.
The module has integrated error evaluation. An
auxiliary supply failure or fuse fault is indicated at a relay
output and displayed via a flashing LED.
PHOENIX CONTACT
8
MACX MCR-EX-SL-2NAM-T(-SP)
5.8
Dimensions
5.9
12,5
B
C
7
114,5
99
Assembly
A
116 (SP)
112,5
Figure 4
Figure 3
•
•
•
103753_en_00
Assembly and Removal
Dimensions (in mm)
Mount the module on a 35 mm DIN rail according to
EN 60715.
When using the DIN rail connector, first place it into the
DIN rail (see A – C, Figure 4). It is used to bridge the
voltage supply and for error messages.
Please also observe the direction of the module and
DIN rail connector when snapping into position:
Snap-on foot below and connector left.
Install the module in suitable housing to meet the
requirements for the protection class.
PHOENIX CONTACT
9
MACX MCR-EX-SL-2NAM-T(-SP)
5.10
Connecting the cables
5.11
AWG 24-14
2
0,2-2,5 mm
Line fault messages from NAMUR signal conditioners that
are connected via DIN rail connectors are signaled as a
group error message from the power and fault signaling
module MACX MCR-PTB(-SP) via a relay output and
indicated by a flashing LED.
7 mm
5.12
Screw connection
MACX MCR-...
A
•
B
Figure 5
Group error message
0,5-0,6 Nm
5-7 lb In
Startup
Before startup, check that the NAMUR signal connector
Ex is wired correctly, in particular with regard to the
wiring and marking of the intrinsically safe circuits.
Screw connection
Permissible conductor cross section: 0.2 mm2 ... 2.5 mm2
• Strip the wire by approximately 7 mm and crimp ferrules
to the end of the wires.
• Insert the conductor into the corresponding connection
terminal.
• Use a screwdriver to tighten the screw in the opening
above the connection terminal.
Connection torque: 0.6 Nm
Spring connection (push-in connection)
AWG 24-16
2
0,2-1,5 mm
MACX MCR-...-SP
A
B
8 mm
A
Figure 6
Push-in connection
Permissible conductor cross section: 0.2 mm2 ... 1.5 mm2
• Strip the wire by approximately 8 mm and crimp ferrules
to the end of the wires.
• Insert the wire into the round opening of the terminal
without using a tool.
• Push in the pushbutton with a screwdriver to release.
103753_en_00
PHOENIX CONTACT
10
MACX MCR-EX-SL-2NAM-T(-SP)
6
Configuration
NOTE: Always disconnect the device from the
power before switching the DIP switches.
NOTE: For switch contacts with open circuit
(Figure 7), line fault detection (DIP2/DIP4 = I) has
to be disabled or the corresponding resistance
circuit has to be provided directly at the switch
contact (Figure 8, e.g. UKK 5-2R/NAMUR
(Order No. 2941662) with D–UKK 3/5 (Order No.
2770024)).
In the default state upon delivery, all DIP switches are set to
the position "I".
R
PW
1
LF
2
LF
T1
OU
MACX MCR-EX-SL-2NAM-T
1.1 2.2
2.1 3.2
3.1
Channel 1
DIP1
DIP1
DIP2
DIP2
T2
OU 1
2
3
4 II
I
4.2
4.1 5.2
5.1
*
6.1
PWR =
OUT =
LF =
Channel 2
DIP3 = I Normal phase (operating
current behavior)
DIP3 = II Inverse phase (closed
circuit current behavior)
DIP4 = I Line fault detection
disabled*
DIP4 = II Line fault detection
enabled
Supply voltage
Switching state of the transistor
Line fault on the sensor cable
1 kΩ
1
10 kΩ
2
Figure 7 Switch contact with
open circuit
(not permitted for safety-related
applications, SIL 2)
6.2
Figure 8 Switch contact
with resistance
circuit
Phase reversal (switch DIP1/DIP3)
(not permitted for safety-related applications, SIL 2)
Line fault detection (switch DIP2/DIP4)
WARNING: For safety-related applications, only
the switch position "DIP2/DIP4=II" is permitted!
Line fault detection is activated and deactivated by the
switches DIP2 (for channel 1) and DIP4 (for channel 2).
If line fault detection is activated, the transistor is disabled if
a line fault occurs. The red LED (LF) flashes
(NAMUR NE 44).
The phase reversal function is activated and deactivated by
the switches DIP1 (for channel 1) and DIP3 (for channel 2).
Channel 1 Channel 2
DIP1
DIP3
= I Normal phase
DIP1
DIP3
= II Inverse phase
Transistor
Conductive if
Blocking if
Normal
phase (I)
I > 2.1 mA
I < 1.2 mA
Inverse
phase (II)
I < 1.2 mA
I > 2.1 mA
Operating range according to EN 60947-5-6 for signaling
the line fault.
– Line break
0.05 mA < IIN < 0.35 mA
– Short circuit
100 < RSensor < 360
If the module is connected to a power module
MACX MCR-PTB(-SP) via a DIN rail connector, a group
error message is also sent to the higher-level evaluation unit
via floating relay output (see Chapter 5.11).
103753_en_00
PHOENIX CONTACT
11
MACX MCR-EX-SL-2NAM-T(-SP)
6.3
Truth table
WARNING: For safety-related applications, only
the switch position "DIP2/DIP4=II" is permitted!
WARNING: Apart from NAMUR sensors, only
switches with resistance circuit are permitted at
the input for safety-related applications (see
Figure 8).
Sensor in input
R
PW
1
LF
2
LF
T1
OU
MACX MCR-EX-SL-2NAM-T
1.2
1.1 2.2
2.1 3.2
3.1
Switch
Open
Closed
Open
Closed
T2
OU 1
2
3
4 II
I
4.2
4.1 5.2
5.1
NAMUR
Blocking
Conductive
Blocking
Conductive
Blocking
Conductive
Any
Any
Blocking
Conductive
Any
Any
Input circuit
State
OK
OK
OK
OK
OK
OK
Open circuit
Short circuit
OK
OK
Open circuit
Short circuit
DIP switches
Channel 1 Channel 2
1
I
I
II
II
I
I
I
I
II
II
II
II
2
I
I
I
I
II
II
II
II
II
II
II
II
DIP2/DIP4 = I Line fault detection disabled
(not permitted for safety-related applications, SIL 2)
DIP2/DIP4 = II Line fault detection enabled
DIP1/DIP3 = I Normal phase
DIP1/DIP3 = II Inverse phase
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3
I
I
II
II
I
I
I
I
II
II
II
II
4
I
I
I
I
II
II
II
II
II
II
II
II
Output
Transistor
Blocking
Conductive
Blocking
Conductive
Blocking
Conductive
Blocking
Blocking
Conductive
Blocking
Blocking
Blocking
LED PWR =
LED OUT =
LED LF =
LED
OUT
LF
LED
yellow
red
Permitted for
safety-related
applications
X
X
X
X
X
X
X
X
no
no
no
no
yes
yes
yes
yes
yes
yes
yes
yes
Supply voltage
Switching state of the transistor
Line fault on the sensor cable
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MACX MCR-EX-SL-2NAM-T(-SP)
7
Comparison of safety data
WARNING: Explosion hazard
Compare the safety data before connecting a
device located in the Ex-i area to the
MACX MCR-EX-SL-2NAM-T(-SP).
Provide proof of intrinsic safety according to standard
IEC/EN 60079-14 and other national standards and
installation specifications, if applicable.
Safety data for the
Field devices:
Ex i NAMUR signal conditioner:
Vi, Ii, Pi, Li, Ci
Vo, Io, Po, Lo, Co
The values for Vo, Io, Po, Lo, and Co can be found under
“Safety data according to ATEX for intrinsically safe circuits”
on page 4.
Example for proof of intrinsic safety (simple circuit)
Vi ≥ Vo
Ii ≥ Io
Pi ≥ Po
Li + Lc ≤ Lo
Ci + Cc ≤ Co
Lc and Cc depend on the cables/lines used.
103753_en_00
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MACX MCR-EX-SL-2NAM-T(-SP)
8
Safety-related applications (SIL 2)
SIL regulations apply to the following modules:
Designation
Order no.
MACX MCR-EX-SL-2NAM-T
2865489
MACX MCR-EX-SL-2NAM-T-SP
2924090
MACX MCR-SL-2NAM-T
2865036
MACX MCR-SL-2NAM-T-SP
2924281
A hardware assessment (FMEDA report) is available for the
aforementioned safety-related NAMUR signal conditioners:
Exida_07/06-39_R006_V1R2.
8.1
Circuits
8.3
Safe state
The "safe state" means that the output is in a nonconductive state, i.e., the transistor is blocking.
8.4
Response Times
Following a state change at the input, the output enters the
safe state in ≤ 0.2 ms.
8.5
Operating mode of the safety function
Operating mode according to IEC/EN 61508: "Low demand
mode".
Input
8.6
Permitted for safety-related applications:
– NAMUR sensor (according to EN 60947-5-6)
– Switch contact with resistance circuit (1 k serial and
10 k parallel (tolerance ±10%))
(Note: The resistance circuit regulates the behavior of a
NAMUR sensor)
1.
2.
Failure behavior and required response
The safe state is entered in the event that a line fault is
detected or the supply voltage fails (see Section 8.3).
The safe state is reached by removing the connection
terminals.
WARNING: Switch contacts without resistance
circuit are not permitted for safety-related
applications.
Output
The safety-related function at the output is dependent on the
position of the switches DIP1 (for channel 1) and DIP3 (for
channel 2).
I = Normal
In the event of a 0 signal (NAMUR sensor
operation high resistance, therefore lower current in
the input circuit), the output (transistor)
switches to the "non-conductive" state.
II = Inverse
In the event of a 1 signal at the input, the
operation output switches to the "non-conductive"
state.
8.2
Diagnostics function via the switches
DIP2/DIP4
For safety applications, line fault detection is enabled, i.e.,
the DIP2/DIP4 switches are in the "II" position.
WARNING: The "DIP2/DIP4 = I" switch position is
not permitted for safety-related applications.
When line fault detection is enabled, the red LED indicates
any faults that occur. If a line fault is detected, the output is
disabled ("non-conductive"). This behavior is not dependent
on the position of the DIP1 and DIP3 switches.
103753_en_00
PHOENIX CONTACT
14
MACX MCR-EX-SL-2NAM-T(-SP)
8.7
Safety integrity requirements
Failure rates
8.8
–
–
–
–
–
–
Type A device (according to IEC/EN 61508-2)
Safety Integrity Level (SIL) 2
HFT = 0
MTTR = 24 h
1oo1 structure
–
–
–
Non-inverted operation:
λSD
λSU
λDD
λDU
12 FIT 251 FIT 15 FIT 64 FIT
SFF
81%
DCS
4.5%
DCD
18.9%
The MTBF is 269 years.
PFDavg values
T[PROOF] =
PFDavg =
1 year
2.80E-04
2 years
5.61E-04
5 years
1.40E-03
–
–
Conditions
The failure rates of the components used remain
constant throughout the period of use.
The propagation of errors by the device in the system is
not taken into consideration.
The repair time (replacement) should be eight hours.
The failure rates of the external power supply are not
taken into consideration.
Line fault detection is enabled.
The average temperature at which the device is to be
used is +40 °C. In this case, normal industrial conditions
are assumed.
The specified error rates are based on an average
ambient temperature of +40 °C. For an average
ambient temperature of +60 °C, the specified failure
rates must be multiplied by a factor of 2.5. This factor is
based on guide values.
Inverted operation:
λSD
λSU
λDD
λDU
2 FIT 262 FIT 12 FIT 64 FIT
SFF
81%
DCS
0%
DCD
15.7%
The MTBF is 269 years.
PFDavg values
T[PROOF] =
PFDavg =
1 year
2.80E-04
2 years
5.61E-04
5 years
1.40E-03
The box marked in white shows that the calculated PFDavg
values are within the permissible range for SIL2 in
accordance with Table 2 of IEC/EN 61508-1. However, they
do not fulfill the requirement to not cover more than 10% of
this safety circuit, i.e., to be better than or equal to 1.00 E03.
The boxes marked in gray show that the calculated PFDavg
values are within the permissible range for SIL 2 in
accordance with Table 2 of IEC/EN 61508-1. They fulfill the
requirement to not cover more than 10% of the safety circuit,
i.e., to be better than or equal to 1.00E-03.
Failure limit
The operating mode is based on low demand mode. The
device covers less than 10% of the PFH/PFD of the entire
safety circuit.
Sensor
Device
Processing
Actuator
25%
< 10%
15%
50%
Figure 9
103753_en_00
Safety circuit
PHOENIX CONTACT
15
MACX MCR-EX-SL-2NAM-T(-SP)
8.9
Installation and Startup
NOTE: Installation, operation, and maintenance
may only be carried out by qualified electricians.
During installation, also follow the installation notes, which
pertain to delivery of the device. (PACKB. MACX MCR-EXSL-2NAM-T(-SP), MNR 9040239). They can also be
downloaded at phoenixcontact.net/products.
• Configure the device according to its safety
requirements based on the truth table on page 12.
Observe the non-approved switch positions for safetyrelated applications.
• Connect the NAMUR signal conditioner according to
the installation manual.
• Check the functionality of the NAMUR signal
conditioner with connected sensor or switch contacts
with resistance circuit for correct function.
• Start up the safety circuit and check that it operates
correctly.
8.10
Notes on operation
During normal operation, the green (PWR) LED is always
on. The yellow LEDs (OUT1/OUT2) indicate the switch
condition of the output transistor. The red LEDs indicate if
there is a line fault when the line fault detection is enabled.
The safe state is entered in the event that a line fault is
detected or the supply voltage fails.
8.11
Startup and restart
Startup or restart of the device
Behavior: The output enters the state without oscillation
(according to the truth table on page 12). A reset is not required.
The line fault is removed.
Behavior: The user has to ensure that a defined state is entered using the truth table on page 12. The device is restarted in the same way as during initial startup. The device
then behaves as described under „Startup or restart of the
device“.
8.12
•
Recurring checks
Check the function of the entire safety circuit according
to IEC/EN 61508 and EN 61511. The intervals for
checking are specified by the intervals of each
individual device within the safety circuit.
It is the operator's responsibility to select the type of
checks and the checking intervals in the specified time
period.
Checking must be carried out in such a way that the
correct function of the safety equipment in conjunction
with all components can be verified.
Possible procedure for recurring checks for
discovering dangerous and undetected device failures
1.
2.
3.
4.
Apply an appropriate signal at the input of the NAMUR
signal conditioner in order to obtain the non-conductive
state at the output. Check whether the output is nonconductive.
Check the conducting status in the same manner.
Restore the safety circuit to full functionality.
Resume normal operation.
With this test around 99% of the possible "du" ("dangerous
undetected") errors in the NAMUR signal conditioner are
discovered.
If the function test result is negative, the device must be
taken out of operation and the process put into a safe state
by other measures.
What happens when a line fault is detected and what
must the user do?
Behavior: The fault is indicated by the red LED and the output enters the "non-conductive" state regardless of the input
signal and the operating mode (normal or inverse mode).
The user has to eliminate the line fault (short circuit or break
in the sensor cable).
The device output is not blocked when fault detection is triggered (no lock or reset). Undefined line states that occur
during repairs can switch the output. The user must prevent
this from happening by disconnecting the supply voltage or
removing the connection terminals.
Other options that have the same result and do not present
an additional hazard are also permitted.
103753_en_00
PHOENIX CONTACT
16
MACX MCR-EX-SL-2NAM-T(-SP)
8.13
Repair
The devices have a long service life, are protected against
malfunctions, and are maintenance-free. However, if a
device should fail, send it back to Phoenix Contact. The type
of malfunction and possible cause has to be stated.
Please use the original packaging or other suitable safe
packaging when sending devices back for repairs.
Phoenix Contact GmbH & Co KG
Abteilung Service und Reparatur
Flachsmarktstr. 8
32825 Blomberg
GERMANY
8.14
Standards (SIL 2)
The devices are developed and tested according to the
following standards:
IEC/EN 61508:2001 Functional safety of electrical/electronic/programmable electronic safety-related systems
EN 61326-1:2006
Electrical equipment for measurement, control and laboratory use EMC requirements
103753_en_00
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MACX MCR-EX-SL-2NAM-T(-SP)
8.15
Abbreviations
Abbreviation
DC
Diagnostic
Coverage
FIT
Failure in time
HFT
Hardware Fault
Tolerance
MTBF
Mean Time
Between
Failures
MTTR
Mean Time To
Repair
PFDavg Average Probability of dangerous Failure on
Demand
PFH
Probability of a
Dangerous Failure per Hour
SFF
Safe Failure
Fraction
SIL
λ
DD
DU
SD
SU
Meaning
Diagnostic coverage of safe
failures (DCS) or dangerous
failures (DCD)
Number of failures that occur
in 109 hours
Hardware fault tolerance: ability of a function unit to continue
with the execution of a demanded function despite existing faults or deviations
Indicates the average time period between one failure and
the next. This includes the
length of time that the component functions for until the failure and the downtime.
Indicates the average time
needed in order to repair a
faulty component.
Average probability of failure
on demand of a safety function
Probability of failure per hour
for the safety function
Proportion of safe failures:
Proportion of failures without
the potential to set the safetyrelated system to a dangerous
or impermissible function state
Safety Integrity
IEC/EN 61508 defines four
Level
safety integrity levels (SIL 1 to
4). The higher the Safety Integrity Level of the safety-related
system, the lower the probability range for the failure of a
safety function.
The failure rate λ indicates the number of errors
per time unit.
Dangerous Detected
Dangerous Undetected
Safe Detected
Safe Undetected
103753_en_00
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