Field Wire Conversion Module for Modicon B838-032 Module to
Two 1756-OB16E Modules
(Cat 1492-CM800-LD012)
10000021903 (Version 00)
Printed in Germany
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Number and in the Search box type in the catalog number of the conversion system component.
I. Module Description
The 1492-CM800-LD012 conversion module provides field wire signal conversion from a Modicon® B838-032, 20 to
28Vdc, 32-pt output module to two ControLogix 1756-OB16E, 10 to 31.2Vdc, 16-pt output modules. The conversion
module provides the mating connections to the B838-032 swing-arm (terminal block) with the attached field wires. It
routes those signals, via its two 20-pin connectors and two 1492-CABLEX pre-wired cables to compatible terminals
of two 1756-OB16E modules (refer to the Wiring Diagram on page 2). NOTE: The B838-032 was mechanically fused
per group. The 1756-OB16E is electronically fused per group. Refer to the 1756-OB16E Installation Manual for additional details on electronic fuse operation.
II. Module Installation
The 1492-CM800-LD012 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
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).
Conversion Module Compatible 800
Output Module
Compatible 1756
Output Module
Required 1492 Cable
1492-CM800-LD0012 B838-032 Two 1756-OB16E Two 1492-CABLEX
Two 20-pin connectors (P1 and P2) for two 1492-CABLEX cables
Mating connector for
B800 Terminal Block
1492-CM800-LD012 Conversion Module
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.
WARNING
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10000021903 (Version 00)
IV. Conversion Module Wiring Diagram
The following diagram shows the connections from the existing B838-032 swing-arm, through the conversion module, two 1492
cables and to the two 1756-OB16E output modules. The diagram can be used as an aid in possible system troubleshooting.
1756-OB16E
1756-OB16E
1492-CABLE003X
1492-CABLE003X
1492-CM800-LD012
Conversion: B838-032 to 1756-OB16E Qty 2 with 1492-CM800-LD012
B838-032 Swing Arm
Conversion Module Installation and Application Considerations
This configuration uses two (2) 1756-OB16E output modules to replace a single B838-032 output module. This may require
the use of a larger 1756 I/O Chassis. Ensure there is sufficient panel space to allow for this possibility.
The B838-032 module output current limits versus 1756-OB16E limits are as follows:
B838-032 1756-OB16E w/ 1492-CABLE003X
a) Current/Point 0.5A 1A
b) Current/Group ---- 2A
c) Current/Module 16A (32 pts) 4A (16 pts)
d) Surge Current/Pt 2.5A for 0.5ms 2A for 10ms
The B838-032 module provided a single mechanical fuse per group. The 1756-OB16E is electronically fused per group.
Refer to the 1756-OB16E Installation Manual for electronic fusing details.
The 1492-CABLE003X current is limited to 2A per pin.
Refer to your B838-032 and 1756-OB16E Installation Manual wiring schematics and diagrams for more details. Ensure
1756 output module ratings are not exceeded.
[Reference Doc: 41170-762 (Version 03)]
1
2
3
4
1
5
21
6
2
7
22
8
3
9
23
10
4
11
24
12
7
13
27
8
15
28
16
9
17
29
18
10
19
30
20
14
11
31
12
32
13
33
14
34
17
37
18
38
19
39
20
40
26
16
Output 1
Output 17
Output 2
Output 18
Output 3
Output 19
Output 4
Output 20
Output 5
Output 21
Output 6
Output 22
Output 7
Output 23
Output 8
Output 24
Output 9
Output 25
Output 10
Output 26
Output 11
Output 27
Output 12
Output 28
Output 13
Output 29
Output 14
Output 30
Output 15
Output 31
Output 16
Output 32
36
5
6Group 1(-)
+
-
LOAD
25
15
35
Group 3(-)
Group 2(-)
Group 4(-)
Group 1(+)
Group 3(+)
Group 2(+)
Group 4(+)
10
DC-0+
OUT-0
1
OUT-1
2
OUT-2
3
OUT-3
4
OUT-4
5
OUT-5
6
OUT-6
7
OUT-7
8
OUT-8
11
OUT-9
12
OUT-10
13
OUT-11
14
OUT-12
15
OUT-13
16
OUT-14
17
OUT-15
18
Black
White
Red
Green
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green
DC-1+
20
9
RTN OUT-0
19
RTN OUT-1
1
2
3
4
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
14
10
DC-0+
OUT-0
1
OUT-1
2
OUT-2
3
OUT-3
4
OUT-4
5
OUT-5
6
OUT-6
7
OUT-7
8
OUT-8
11
OUT-9
12
OUT-10
13
OUT-11
14
OUT-12
15
OUT-13
16
OUT-14
17
OUT-15
18
Black
White
Red
Green
Orange
Blue
White/Black
Red/Black
Green/Black
Orange/Black
Blue/Black
Black/White
Red/White
Green/White
Blue/White
Black/Red
White/Red
Orange/Red
Blue/Red
Red/Green
DC-1+
20
9
RTN OUT-0
19
RTN OUT-1
MODULE A
MODULE B
P1
P2
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.
WARNING
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10000021903 (Version 00)
V. 1492-CM800-LD012 Conversion Module Specifications
(Operating specifications are when installed in the Conversion System base / cover-plate assembly)
Specification Value
Dimensions 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)
Approximate Shipping Weight 300g (0.66 lbs) (includes carton)
Storage Temperature -40 to +85°C (-40 to +185°F)
Operating Temperature 0 to 55°C (32 to 131°F)
Operating Humidity 5 to 95% at 55°C (non-condensing)
Shock
Non-operating
Operating
50g
30g
Operating Vibration 2g @ 10-500Hz
Maximum Operating Voltage 150 Vdc
Max. Module Operating Current
Per Point:
Per Module:
2 Amps (1492-CABLE connection pins are limited to 2A per pin)
12 Amps
Agency Certifications
UL Classified: Under UL File Number E113724
CSA
CE: compliant for all applicable directives
Pollution Degree 2
Environmental Rating IP20
Refer to the Wiring Diagram(s) for
current limits for a specific configuration.
NOTICE
10000021903 (Version 00)
Printed in Germany
Article No. 4351960000
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 I/O.
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.
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
AS-H810-xxx
AS-H819-103
AS-H819-209
AS-H819-100
AS-H827-103
AS-H827-209
AS-B827-100
Modicon 800 I/O
Housing Cat Number
1492-MUA4-MB3
1492-MUA7-A10-
MB4679
1492-MUA10-A13-
MB81011
Conversion Assembly
Catalog Number
3
4
6
7
8
10
11
10.25”
17.5”
17.5”
17.5”
27.1”
27.1”
27.1”
10.25”
A7 = 14.49”
A10 = 19.02”
A7 = 14.49”
A10 = 19.02”
A7 = 14.49”
A10 = 19.02”
A10 = 19.02”
A13 = 23.15”
A10 = 19.02”
A13 = 23.15”
A10 = 19.02”
A13 = 23.15”
1756 Chassis
Width
Dimension
3
A7 = 6, A10=9
A7 = 6, A10=9
A7 = 6, A10=9
A10 = 9, A13=12
A10 = 9, A13=12
A10 = 9, A13=12
1756 I/O Chassis
Catalog Number
1 72 3 654
1756-A4
1756-A7
or
1756-A10
1756-A10
or
1756-A13
Max. Number
of 800 Housing
Slots for I/O
800 Housing
Width
Dimension
Max. Number
of 1756 Chassis
Slots for I/O
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