Allen-Bradley 1492 Field Wire Conv. Module Installation Instructions
The Allen-Bradley 1492 Field Wire Conv. Module lets you convert signals from a Modicon B838-032 output module to two ControLogix 1756-OB16E modules. This conversion module simplifies wiring and provides compatibility between legacy and newer systems. It is compatible with 1492 conversion base-plate and cover-plate assemblies. The module is recommended for use with 1492-CABLE003X cables. The 1492 Conversion Module is UL Classified, CSA and CE compliant.
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Field Wire Conversion Module for Modicon B838-032 Module to Two 1756-OB16E Modules (Cat 1492-CM800-LD012) Local language (French, Italian, German & Spanish) versions of this document can be downloaded by going to www.ab.com. In the left margin click on Publications Library and Literature Library. In the Search Area (right margin), Search by Catalog 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. Two 20-pin connectors (P1 and P2) for two 1492-CABLEX cables Mating connector for B800 Terminal Block 1492-CM800-LD012 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-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 Conversion Module 1492-CM800-LD0012 Compatible 800 Output Module B838-032 Compatible 1756 Output Module Two 1756-OB16E Required 1492 Cable Two 1492-CABLEX 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). 10000021903 (Version 00) Printed in Germany 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. 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 Conversion: B838-032 to 1756-OB16E Qty 2 with 1492-CM800-LD012 1492-CM800-LD012 + - 25 26 21 22 23 24 27 28 29 30 31 32 33 34 37 38 39 40 35 36 P2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 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 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 1756-OB16E 1492-CABLE003X 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 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-0+ RTN OUT-0 OUT-0 OUT-1 OUT-2 OUT-3 OUT-4 OUT-5 OUT-6 OUT-7 OUT-8 OUT-9 OUT-10 OUT-11 OUT-12 OUT-13 OUT-14 OUT-15 DC-1+ RTN OUT-1 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 DC-0+ RTN OUT-0 OUT-0 OUT-1 OUT-2 OUT-3 OUT-4 OUT-5 OUT-6 OUT-7 OUT-8 OUT-9 OUT-10 OUT-11 OUT-12 OUT-13 OUT-14 OUT-15 DC-1+ RTN OUT-1 MODULE B Group 3(+) Group 3(-) Output 17 Output 18 Output 19 Output 20 Output 21 Output 22 Output 23 Output 24 Output 25 Output 26 Output 27 Output 28 Output 29 Output 30 Output 31 Output 32 Group 4(+) Group 4(-) 5 6 1 2 3 4 7 8 9 10 11 12 13 14 17 18 19 20 15 16 1756-OB16E 1492-CABLE003X MODULE A LOAD Group 1(+) Group 1(-) Output 1 Output 2 Output 3 Output 4 Output 5 Output 6 Output 7 Output 8 Output 9 Output 10 Output 11 Output 12 Output 13 Output 14 Output 15 Output 16 Group 2(+) Group 2(-) P1 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 [Reference Doc: 41170-762 (Version 03)] 1756 output module ratings are not exceeded. (2) 10000021903 (Version 00) V. 1492-CM800-LD012 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 150 Vdc 2 Amps (1492-CABLE connection pins are limited to 2A per pin) 12 Amps Refer to the Wiring Diagram(s) for NOTICE current limits for a specific configuration. Agency Certifications Pollution Degree Environmental Rating 10000021903 (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 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. 1 2 3 4 5 6 7 1756 Chassis Max. Number 800 Housing Max. Number 1756 I/O Chassis Modicon 800 I/O Conversion Assembly Width Catalog Number of 1756 Chassis Width Housing Cat Number of 800 Housing 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. 4351960000 10000021903 (Version 00) Printed in Germany ">

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Key features
- Signal conversion
- B838-032 to 1756-OB16E
- 1492 Conversion Assembly compatible
- UL Classified, CSA and CE compliant
Frequently asked questions
The module converts field wire signals from a Modicon B838-032 module to two ControLogix 1756-OB16E modules.
Two 1756-OB16E modules can be connected to the 1492-CM800-LD012 conversion module.
The 1492-CM800-LD012 conversion module uses two 1492-CABLEX pre-wired cables.