Allen-Bradley 1492 Fused Field Wire Conversion Module Installation Instructions
Allen-Bradley 1492 Fused Field Wire Conversion Module is designed to simplify the migration of your legacy Modicon® B820-008 output modules to the newer ControLogix® 1756-OB8 or 1756-OC8 output modules. This module provides the necessary signal conversion and wiring connections, enabling you to easily integrate your existing field wiring with the new output modules. The conversion module also includes mechanical fuses, ensuring protection for your system's power supplies. It is compatible with specific 1492 conversion base-plate and cover-plate assemblies, allowing for a seamless installation into your existing control system.
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Fused Field Wire Conversion Module for Modicon B820-008 to 1756-OB8 or 1756-OC8 (Cat 1492-CM800-LD006) 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-LD006 conversion module provides field wire signal conversion from a Modicon® B820-008, 10 to 60Vdc, 8-pt output module to a ControLogix 1756-OB8, 10 to 30Vdc or 1756-OC8, 30 to 60Vdc, 8-pt output module. The conversion module provides the mating connections to the B820-008 swing-arm (terminal block) with the attached field wires. It routes those signals, via its 20-pin connector and a 1492-CABLEU pre-wired cable to compatible terminals of the 1756-OB8 or 1756-OC8. To maintain the functionality of the B820-008 output module the conversion module provides a mechanical fuse for each of the two power supplies (DC-0+ and DC-1+) on the 1756-OB8 and 1756-OC8 (refer to the below Wiring Diagrams for details). 20-Pin Connector for 1492-CABLEU Mating Connector for B800 Terminal Block 1492-CM800-LD006 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-LD006 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-LD006 1492-CM800-LD006 Compatible 800 Output Module B820-008 B820-008 Compatible 1756 Required 1492 Cable Module 1756-OB8 1492-CABLEU 1756-OC8 1492-CABLEU 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). 10000021873 (Version 00) Printed in Germany IV. Conversion Module Wiring Diagram The following diagram shows the connections from the existing B802-008 swing-arm, through the conversion module, 1492 cable and to the 1756-OA8 or 1756-OC8 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. In addition, refer to the current draw requirements of the existing loads for this configuration to ensure they are within the current ratings of the 1756 output module. Conversion: B820-008 to 1756-OB8 with 1492-CM800-LD006 1492-CM800-LD006 1756-OB8 1492-CABLE003U - + Output 1 LOAD Output 2 Output 3 Output 4 Common Grp 1 Supply Voltage Grp 1 1 2 7 8 3 4 Supply Voltage Grp 2 Common Grp 2 10 9 Supply Voltage Grp 3 14 Supply Voltage Grp 4 Output 5 Output 6 Output 7 Output 8 Common Grp 3 Common Grp 4 Not Used Not Used Not Used Not Used 20 11 12 17 18 13 19 5 6 15 16 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 2 1 3 5 7 9 4 6 8 10 12 14 16 18 11 13 15 17 19 20 DC-0(+) OUT-0 OUT-1 OUT-2 OUT-3 RTN OUT-0 DC-0(+) DC-0(+) DC-0(+) RTN OUT-0 DC-1(+) DC-1(+) DC-1(+) DC-1(+) OUT-4 OUT-5 OUT-6 OUT-7 RTN OUT-1 RTN OUT-1 B820-008 Swing Arm Conversion Module Installation and Application Considerations The voltage range of the B820-008 module is 10-60VDC and the 1756-OB8 is 10-30VDC. If the load source voltage is greater than 30 VDC range, use the 1756-OC8. The B820-008 module output current limits versus 1756-OB8 limits are as follows: B820-008 1756-OB8 w/ 1492-CABLE003U a) Current/Point 2A 2A b) Current/Group 6A -c) Current/Module 12A 8A d) Surge Current/Pt 10A for 10ms 4A for 10ms The B820-008 has 4 groups (allowing 4 separate power supplies) and the 1756-OB8 has 2 groups. This module/cable combination ties Groups 1 & 2 from the B820-008 to Group 0 on the 1756-OB8 and it ties Groups 3 & 4 from the B820-008 to Group 1 on the 1756-OB8. Field wiring modification must be made to accommodate this if multiple supplies were used. If 4 supplies were used, 2 must be removed. The B820-008 provided a single fuse per group. The 1756-OB8 is NOT fused. The 1492-CM800-LD006 provides a 5x20mm fuse per 1756-OB8 Group. Fuse rating for this configuration is 4 Amps. The 1492-CABLE003U current is limited to 2A per pin. Refer to your B820-008 and 1756-OB8 Installation Manual wiring schematics and diagrams. Ensure 1756 output [Reference Doc: 41170-755 (Version 03)] module ratings are not exceeded. 10000021873 (Version 00) (2) IV. Conversion Module Wiring Diagram (Continued) 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. In addition, refer to the current draw requirements of the existing loads for this configuration to ensure they are within the current ratings of the 1756 output module. Conversion: B820-008 to 1756-OC8 with 1492-CM800-LD006 1492-CM800-LD006 1756-OC8 1492-CABLE003U - + Output 1 LOAD Output 2 Output 3 Output 4 Common Grp 1 Supply Voltage Grp 1 1 2 7 8 3 4 Supply Voltage Grp 2 Common Grp 2 10 9 Supply Voltage Grp 3 14 Supply Voltage Grp 4 Output 5 Output 6 Output 7 Output 8 Common Grp 3 Common Grp 4 Not Used Not Used Not Used Not Used 20 11 12 17 18 13 19 5 6 15 16 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 2 1 3 5 7 9 4 6 8 10 12 14 16 18 11 13 15 17 19 20 DC-0(+) OUT-0 OUT-1 OUT-2 OUT-3 RTN OUT-0 DC-0(+) DC-0(+) DC-0(+) RTN OUT-0 DC-1(+) DC-1(+) DC-1(+) DC-1(+) OUT-4 OUT-5 OUT-6 OUT-7 RTN OUT-1 RTN OUT-1 B820-008 Swing Arm Conversion Module Installation and Application Considerations The voltage range of the B820-008 module is 10-60VDC and the 1756-OC8 is 30-60VDC. If the load source voltage is less than 30VDC range, use the 1756-OB8. The B820-008 module output current limits versus 1756-OC8 limits are as follows: B820-008 1756-OC8 w/ 1492-CABLE003U a) Current/Point 2A 2A b) Current/Group 6A -c) Current/Module 12A 8A d) Surge Current/Pt 10A for 10ms 4A for 10ms The B820-008 has 4 groups (allowing 4 separate power supplies) and the 1756-OC8 has 2 groups. This module/cable combination ties Groups 1 & 2 from the B820-008 to Group 0 on the 1756-OC8 and it ties Groups 3 & 4 from the B820-008 to Group 1 on the 1756-OC8. Field wiring modification must be made to accommodate this if multiple supplies were used. If 4 supplies were used, 2 must be removed. The B820-008 provided a single fuse per group. The 1756-OC8 is NOT fused. The 1492-CM800-LD006 provides a 5x20mm fuse per 1756-OC8 Group. Fuse rating for this configuration is 4 Amps. The 1492-CABLE003U current is limited to 2A per pin. Refer to your B820-008 and 1756-OC8 Installation Manual wiring schematics and diagrams. Ensure 1756 output [Reference Doc: 41170-768 (Version 03)] module ratings are not exceeded. 10000021873 (Version 00) (3) V. Fuse Installation and Replacement The 1492-CM800-LD006 conversion module has two mechanical fuse holders with fuses located on the circuit board inside the modules plastic case. The following explains how to replace the fuses: 1) Remove the Screw from the bottom of the conversion module. 2) Push UP and IN on the locking tab at the other end of the conversion module. Locking Tab IN UP 3) Remove the top cover (part which has the nameplate label) from the module. 10000021873 (Version 00) (4) V. Fuse Installation and Replacement (Continued) 4) To replace the fuse turn the circuit board over. The fuses and fuse information is visible on the circuit board. Fuse Holders and Fuse Data NOTES: 1) For conversion module operation a fuse must be inserted into each of the 2 fuse holders. 2) Physical Fuse Size: 5 x 20 mm 3) Possible Fuse Suppliers: Shurter (Part Number: 0034.3123) and Cooper Bussmann (Part Number: GMC-4A). 4) Fuse Current Rating Based on Conversion System Components: 4 Amps VI. Conversion Module Re-assembly After Fuse Insertion/Replacement 1) To re-assemble the fused module, place the fuse board into the label side half of the module with the fused side of the board UP. Case surface with module label 10000021873 (Version 00) (5) VI. Conversion Module Re-assembly After Fuse Insertion/Replacement (Continued) 2) Take the module half with the locking tab and partially insert the tab into the mating slot Locking Tab: Partially Inserted 3) At the other end of the module assembly, ensure the bottom guide/retainer clears the top locking extension. Push the 2 case halves up and in until you here the locking tab snap into place. Extension Guide / retainer 4) Replace the module case screw [maximum torque 0.7 Nm (6.9 lb-in)]. 10000021873 (Version 00) (6) VII. 1492-CM800-LD006 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: Fusing Agency Certifications Pollution Degree Environmental Rating 10000021873 (Version 00) 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. Two, 4 Amps, 5 x 20 mm UL Classified: Under UL File Number E113724 CSA CE: compliant for all applicable directives 2 IP20 (7) VIII. 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 Max. Number 800 Housing Max. Number 1756 Chassis 1756 I/O Chassis Modicon 800 I/O Conversion Assembly of 800 Housing Width Catalog Number of 1756 Chassis Width Housing Cat Number Catalog Number Slots for I/O Dimension Slots for I/O Dimension 10.25” 3 10.25” 1756-A4 3 AS-H810-xxx 1492-MUA4-MB3 A7 = 14.49” 4 17.5” A7 = 6, A10=9 AS-H819-103 A10 = 19.02” 1756-A7 A7 = 14.49” 1492-MUA7-A10 6 17.5” or A7 = 6, A10=9 AS-H819-209 MB4679 1756-A10 A10 = 19.02” A7 = 14.49” 7 17.5” A7 = 6, A10=9 AS-H819-100 A10 = 19.02” A10 = 19.02” 8 27.1” A10 = 9, A13=12 AS-H827-103 A13 = 23.15” A10 = 19.02” 1756-A10 1492-MUA10-A1310 27.1” or A10 = 9, A13=12 AS-H827-209 MB81011 A13 = 23.15” 1756-A13 A10 = 19.02” 11 27.1” A10 = 9, A13=12 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. 4351890000 10000021873 (Version 00) Printed in Germany ">

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Key features
- Signal conversion
- Fused protection
- Compatibility with 1756-OB8/OC8 modules
- Compatibility with 1492 base-plate
- Easy installation
Frequently asked questions
The 1492-CM800-LD006 is compatible with the Modicon® B820-008 output module (10-60Vdc) and can be paired with either the ControLogix® 1756-OB8 (10-30Vdc) or 1756-OC8 (30-60Vdc) output modules.
The recommended cable length for the 1492-CABLE connection is 003 (0.3 meters).
The fuse rating for the 1492-CM800-LD006 conversion module is 4 Amps. There are two fuses, one for each group on the 1756-OB8 or 1756-OC8.