EM-DR1-IS-5-RTB-28V/OC 数据手册
| INTRINSIC SAFETY BARRIER
Introduction
This Intrinsic Safety Barrier Module is the perfect complement to our
Intrinsically Safe Encoders and, when used together, constitutes a
completely engineered solution for encoder operation in Class I and
Class II, Division 1 (Zone 0) Hazardous Environments. This single barrier
provides both power and signal isolation for an incremental encoder
with differential quadrature outputs and an index. This all-in-one
approach saves the cost, inconvenience and system design time
needed when using separate power and signal barriers. This barrier is
galvanically isolated which eliminates the added cost of maintaining
a high integrity earth ground. With differential line driver outputs,
this barrier can be used to carry signals reliably up to 500 feet with a
bandwidth of up to 250 kHz. It is designed around a standard DIN Rail
mounting (Type EN 50022, 35 mm X 7.5 mm) for easy installation in
standard enclosures. A length of DIN rail is supplied with each module.
The module simply snaps directly to the DIN rail and is ready to use.
The Intrinsic Safety Barrier Module is also certified to be installed in
Class I, Div. 2 (Zone 2) areas.
When properly connected, differential data signals have an inherent
immunity to noise since it is rejected as common mode. However if a
connection between the encoder and the barrier is broken or improperly
terminated it can act as an antenna and still create a signal. An open
wire detection (ISD) option is available on BEI’s Intrinsically Safe
Barriers (28V/V and 28V/5 only). In the event that the data line is cut
or not properly connected the ISD option can detect a change in the
impedance of the connection and cause the output data on both legs of
the differential signal to go low. This creates an erroneous logic state
that can be used by the operator to halt or modify a process.
SPECIFICATIONS
Power Supply / Output Type
Part Number
Barrier Supply: Vs ±5%
Output logic to Non-hazardous Area Apparatus
60004-002
Vout = 5V
60004-003
Vout = Vin
60004-004
Open Collector
12-28 VDC
60004-005
Vout = 5V
60004-006
Vout = Vin
!
Line Driver
up to 100 mA source/sink
(TTL & RS422 compatible)
Line Driver
up to 100 mA source/sink
NPN
up to 80 mA sink
Line Driver
up to 100 mA source/sink
Open wire detect option
Line Driver
up to 100 mA source/sink
Open wire detect option
Caution: Operation above or below barrier supply voltage (Vs) range noted will cause permanent damage to barrier
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Barrier Parameters
Class I, Gp D
Class II, Gps E,F,G
Group IIA
Class I, Gps C,D
Class II, Gps E,F,G
Group IIB
Class I, Gps A,B,C,D
Class II, Gps E,F,G
Group IIC
Barrier Output
(Po)
Voc (Uo)
Isc (Io)
Ca (Co)
La (Lo)
L/R Ratio
Ca (Co)
La (Lo)
L/R Ratio
Ca (Co)
La (Lo)
L/R Ratio
870 mW
9.48 VDC
367 mA
255 uF
2.1 mH
327 uH/Ω
27 uF
1.05 mH
160 uH/Ω
3.7 uF
0.26 mH
40.8 uH/Ω
Input to Barrier from Encoder
Signals
A, B, Z, A/, B/, Z/ differential or A,B,Z single-ended
Input Signal Impedance
500 Ω nominal (A to A/, B to B/, Z to Z/)
Input Signal level
4 VDC minimum, 6 VDC maximum
GENERAL WIRING DIAGRAM
(see BEI Sensors drawing 08067-003 for important details)
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Example : EM-DR1-IS-5-RTB-28V/V
ORDERING OPTIONS
Use this diagram, working from left to right to construct your model number
EM
-
DR1
-
IS
-
-
5
RTB
-
Type
EM = Electronic Module, DIN Rail mount
Package Style
DR1 = 114.5 mm x 99mm x 22.5 mm
Function
IS = Intrinsically Safe
ISD = Intrinsically Safe with Open Wire Detection
(available with 28V/V or 28V/5 supply voltage/output)
Output Voltage to Encoder
5 = 5 VDC
Output Termination
RTB = Remove Terminal Block
Voltage/Output
28V/V = 12-28 VDC, Vout = Vin
28V/5 = 12-28 VDC, Vout = 5 volts
28V/OC = 12-28 VDC, Vout = Open Coll.
AGENCY APPROVALS & CERTIFICATES
This Intrinsic Safety Barrier has certifications to be used as an associated apparatus
for intrinsically safe encoders installed in the following hazardous locations:
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