Allen-Bradley 1492 Field Wire Conv. Module Installation Instructions

Field Wire Conversion Module for Modicon B872-200 Analog Voltage Output
to 1756-OF6VI Analog Voltage Output
(Cat 1492-CM800-LA004)
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I. Module Description
The 1492-CM800-LA004 conversion module provides field wire signal conversion from a Modicon® B872-200,
analog, 4-channel, individually isolated voltage output module to a ControLogix 1756-OF6VI, analog, 6-channel,
individually isolated voltage output module. The conversion module provides the mating connections to the B872-200
swing-arm (terminal block) with the attached field wires. It routes those signals, via its 25-pin, D-shell connector and
a 1492-ACABLEY pre-wired cable to the compatible terminals of the 1756-OF6VI (refer to the Wiring Diagram on
page 2).
25pin D-shell connector for 1492-ACABLEY
Mating connector for
B800 Terminal Block
1492-CM800-LA004 Conversion Module
WARNING
De-energize and lockout any and all power to all I/O field devices connected to the Modicon 800 I/O
housing, and the power to the 800 I/O housing itself. Ensure all power is de-energized and locked out
to any device in the control cabinet where the conversion is to be performed. Ensure work is performed
by qualified personnel.
II. Module Installation
The 1492-CM800-LA004 conversion module must be installed in a 1492 conversion base-plate and cover-plate assembly. The installation of the module into the assembly is explained in the Installation Manual that ships with the conversion
assembly. For a list of compatible assemblies refer to Appendix A.
III. Conversion Module Compatibility Matrix
Conversion Module
Compatible 800
Compatible 1756
Required 1492 Cable
Output Module
Output Module
1492-CM800-LA004 B872-200 voltage output 1756-OF6VI voltage output
1492-ACABLEY
 This is the cable length in meters and tenths of meters (e.g. 015 = 1.5 meters). Recommended cable
length is 003 (00.3 meters).
10000021843 (Version 00)
Printed in Germany
IV. Conversion Module Wiring Diagram
The following diagram shows the connections from the existing B872-100 swing-arm, through the conversion module, 1492
cable and to the 1756-OF6CI analog output module. The diagram can be used as an aid in possible system troubleshooting.
WARNING
There are several key application considerations and system specifications (bottom of drawing) when
using these components (conversion module, cable and output module). Read and understand these
considerations before installation.
Conversion: B872-200 to 1756-OF6VI with 1492-CM800-LA004
1492-CM800-LA004
+
-
Analog Output 1
Analog Common 1
Analog Common 1
Analog Output 2
Analog Common 2
Analog Common 2
Analog Output 3
Analog Common 3
Analog Common 3
Analog Output 4
Analog Common 4
Analog Common 4
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Frame Ground
Frame Ground
Frame Ground
Frame Ground
13
25
24
23
22
21
19
18
17
16
15
14
6
20
12
11
9
4
2
SH
6
4
5
14
12
13
26
24
25
34
32
33
3
7
8
9
10
11
15
16
17
18
19
20
21
22
23
27
28
29
30
31
35
36
37
38
1
2
39
40
1756-OF6VI
1492-ACABLE003Y
1
5
2
6
7
11
8
12
15
19
16
20
10
14
Red
Black
Blue
Black
White
Black
Yellow
Black
Green
Black
Orange
Black
Brown
Black
OUT-0
RTN-0
OUT-1
RTN-1
OUT-2
RTN-2
OUT-3
RTN-3
OUT-4
RTN-4
OUT-5
RTN-5
Not Used
Not Used

B872-200 Swing Arm
Conversion Module Installation and Application Considerations
 SHIELD GROUNDING: The B872-200 analog output module allowed shield grounding at the field device or to the B872-200 “Frame
Ground” terminal or to the Analog Common. If the shield was previously connected to the Analog Common terminal, it is required that the
shield be removed and reconnected to the Frame Ground terminal. The pre-wired cable used between the 1492-CM800-LA004 and the
1756-OF6VI [1492-ACABLE003Y] provides a shield ground lug to ground the shield at the 1756 ControlLogix chassis, this must be
connected.
 Refer to your B872-200 and 1756-OF6VI Installation and User Manuals for additional information concerning comparisons of module
wiring, features, and module configuration details.
[Reference Doc: 41170-784 (Version 03)]
10000021843 (Version 00)
(2)
V. 1492-CM800-LA004 Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification
Dimensions
Approximate Shipping Weight
Storage Temperature
Operating Temperature
Operating Humidity
Shock
Non-operating
Operating
Operating Vibration
Maximum Operating Voltage
Max. Module Operating Current
Per Point:
Per Module:
Value
288.9 mm (height) x 139.7 mm (depth) x 44.5 mm (width)
11.37 in. (height) x 5.5 in. (depth) x 1.75 in. (width)
300g (0.66 lbs) (includes carton)
-40 to +85°C (-40 to +185°F)
0 to 55°C (32 to 131°F)
5 to 95% at 55°C (non-condensing)
50g
30g
2g @ 10-500Hz
60 Vdc
2 Amps (1492-CABLE connection pins are limited to 2A per pin)
12 Amps
NOTICE
Refer to the Wiring Diagram(s) for
current limits for a specific configuration.
Agency Certifications
Pollution Degree
Environmental Rating
10000021843 (Version 00)
UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
2
IP20
(3)
VI. Appendix A - 800 Housing to 1756 Chassis Conversion System Selection Process
1) Determine the number of 800 I/O modules actually used in the 800 I/O Housing to be converted to 1756.
2) Review the data in Column 5 from the below table, and select a 1756 I/O Chassis which meets your conversion
needs from Step 1. Ensure the information from the I/O Conversion module table is reviewed first since in some
cases, two 1756 modules are needed to replace one 800 I/O module.
3) Once the 1756 Chassis is selected, refer to Column 7 and select the Conversion Assembly.
1
2
3
4
5
6
7
Max. Number 800 Housing
Max. Number 1756 Chassis
1756 I/O Chassis
Modicon 800 I/O
Conversion Assembly
of 800 Housing
Width
of 1756 Chassis Width 
Catalog Number
Housing Cat Number
Catalog Number 
Slots for I/O
Dimension
Slots for I/O  Dimension
1756-A4
3
10.25”
10.25”
AS-H810-xxx
3
1492-MUA4-MB3
A7 = 14.49”

A7 = 6, A10=9
4
17.5”
AS-H819-103
A10 = 19.02”
1756-A7
A7 = 14.49”
1492-MUA7-A10
or
A7 = 6, A10=9
6
17.5”
AS-H819-209
MB4679 
1756-A10
A10 = 19.02”
A7 = 14.49”

A7 = 6, A10=9
7
17.5”
AS-H819-100
A10 = 19.02”
A10 = 19.02”
A10 = 9, A13=12
AS-H827-103
8
27.1”
A13 = 23.15”
A10 = 19.02”
1756-A10
1492-MUA10-A13or
A10 = 9, A13=12
27.1”
AS-H827-209
10
MB81011 
A13 = 23.15”
1756-A13
A10 = 19.02”
A10 = 9, A13=12
27.1”
11
AS-B827-100
A13 = 23.15”
 One chassis slot required for the ControlLogix processor or a remote I/O adapter type module.
 The footprint and mounting dimensions of the 1492 Conversion Assembly (base plate and cover plate) match those of the
Modicon I/O Housing.
 Width dimension includes the 1756 Chassis power supply.
 Surplus Chassis width as compared to the 800 I/O Housing is divided equally when mounting it on the Conversion Assembly.
 Mounting holes for the 1756 I/O Chassis are pre-drilled and pre-tapped into the Conversion Assembly cover plate.
Modicon is a Registered Trademark of Group Schneider.
Article No. 4351830000
10000021843 (Version 00)
Printed in Germany
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