Allen-Bradley 1492 Digital I/O Conversion Module Installation Instructions
Allen-Bradley 1492 Digital I/O Conversion Module allows you to convert older 1771 I/O modules to the newer, more compatible 1756 platform. This conversion is accomplished without requiring the removal of any existing field wiring from the 1771 system. The module is designed to be installed in a 1492 Conversion Mounting Assembly. This conversion system includes the Conversion Module (1492-CM1771-LD001), a cable (1492-CONCAB005X) and a Mounting Assembly (1492-MUA...). The 1492 Conversion Mounting Assembly is dimensionally similar to the 1771 Chassis and can be mounted using the same hardware.
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Digital I/O Conversion Module (Cat 1492-CM1771-LD001) I. Description This Digital I/O Conversion system provides for the conversion of (1) 1771, 16 point I/O modules to be converted to (1) 1756, 16 point I/O module and consists of the following: (1) 1771 Modules (16pt) to (1) 1756 Module (16pt) (2) Conversion Modules: 1492-CM1771-LD001 (1) Cable: 1492-CONCAB005X (Table 2) (1) Conversion Mounting Assembly: 1492-MUA… (Table 1) This conversion is accomplished without the removal of any field wires from the existing 1771 Swing Arm. The existing 1771 Swing Arm fits directly onto the edge connector of the 1492 Conversion Module. On one end of the 1492 Cable is (1) connector for the Conversion Module. On the other end is the Removable Terminal Block (RTB) for the 1756 I/O module, as shown in the photo below. The I/O signals are routed through the 1492 Conversion Module and the 1492 Cable to the appropriate terminals on the 1756 I/O module per the Wiring Diagrams in Section V. As standard, both portions of the 1492 Cables are 0.5M long, but we also offer a 1.0M cable length. Refer to the footnotes in Table 2, Section III for further details. Conversion Compatibility and Product I.D. Label 25-Pin Connector for cable 1492-CONCAB005X 1492-CM1771-LD001 Conversion Module WARNING PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E Printed in U.S.A. De-energize and lockout any and all power to all I/O field devices connected to the A-B 1771 I/O Chassis, and the power to the 1771 I/O Chassis 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. Installation The 1492 Conversion Modules must be installed in a 1492 Conversion Mounting Assembly (see Table 1 below). A complete System Installation Manual ships with the 1492 Conversion Mounting Assembly. 1) Determine the quantity of each type of 1771 I/O modules used in the 1771 I/O Chassis to be converted. 2) Select the applicable 1492 Conversion Modules from Table 2, Section III. 3) Review the Max Slots for I/O and Chassis Width data from the Table 1 below. 4) Select a 1756 I/O Chassis which has enough I/O Slots. NOTE: (2) I/O slots are required in the 1756 Chassis for conversions where (1) 1771 I/O module converts to (2) 1756 I/O modules. 5) Select the 1492 Conversion Mounting Assembly which has enough Conversion Module slots. NOTE: (2) Conversion Module slots are required in the 1492 Conversion Mounting Assembly for conversions where (2) 1771 I/O module convert to (1) 1756 I/O modules. NOTE: The 1492 Conversion Mounting Assembly has the same Height & Width foot-print as the 1771 Chassis and is designed to use the same mounting hardware. The combined Depth of the 1492 Conversion Mounting Assembly with the 1756 Chassis mounted on top is 10.25 inches (Controller w/key) or 10.0 inches (Controller w/o key). Dimension drawings are included in the System Installation Manual that ships with the 1492 Conversion Mounting Assembly. Table 1: Bulletin 1771 to 1756 Chassis Conversion 1771 Chassis Cat. No. Max Slots for I/O 1771-A1B 4 1771-A2B 8 1756 Chassis Chassis Width without Power Supply with Power Supply 9.01 12.61 14.01 17.61 Conversion Mounting Assembly Cat. No. Max Slots for I/O Chassis Width Cat. No. Max Slots for Conversion Modules Chassis Width 1492-MUA1B-A4-A7 4 9.01 1756-A4 3 10.35 1756-A7 6 14.49 1756-A7 1756-A10 6 9 14.49 19.02 1492-MUA2B-A7-A10 8 14.01 1771-A3B1 12 19.01 1756-A10 1756-A13 9 12 19.02 23.15 1492-MUA3-A10-A13 12 19.01 1771-A4B 16 24.01 1756-A13 1756-A17 12 16 23.15 29.06 1492-MUA4-A13-A17 16 24.01 1771-A3B is not listed as it is used for 19 inch wide instrumentation panels. Notice that the 1756 Chassis Width sometimes exceeds the 1771 Chassis Width, with or without the Power Supply. The Cover-Plate of the 1492 Conversion Mounting Assembly allows the 1756 Chassis to be Left justified, Right justified or Centered. A complete System Installation Manual ships with the 1492 Conversion Mounting Assembly. PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (2) III. Compatiblity Table 2: Bulletin 1771 to 1756 Conversion Modules and Cables 1756 1771 Digital I/O Module Digital I/O Module 1771-IAD 1771-IBD 1771-ICD 1771-IND 1771-IND1 1756-IA16 1756-IB16 1756-IC16 1756-IN16 1756-IN16 1492 Conversion Module 1492-CM1771-LD001 1492-CM1771-LD001 1492-CM1771-LD001 1492-CM1771-LD001 1492-CM1771-LD001 1492 Cable 1492-CONCAB005X 1492-CONCAB005X 1492-CONCAB005X 1492-CONCAB005X 1492-CONCAB005X Foot Notes: To understand any issues concerning I/O module compatibility, refer to the Installation Manuals for the specific 1771 and 1756 I/O modules involved. The 3 numbers indicate the cable length of each portion of the 1492 Cable. Recommended cable lengths of 0.5M are shown. Additional cable lengths are as follows: 1.0M = 1492-CONCAB010X IV. 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: 11.81 in. (height) x 4.38 in. (depth) x 1.5 in. (width) 300 mm. (height) x 111.25 mm (depth) x 38.1 mm (width) 258.3 g (0.59 lbs) (includes carton) -40 to +85°C (-40 to +185°F) 0 to 60°C (32 to 140°F) 5 to 95% at 60°C (non-condensing) 50g 30g 2g at 10 to 500Hz (Agrees with 1756 I/O module specifications) 132 Vac at 47 to 63Hz or 132 Vdc 2 Amps 2 Amps Refer to the Wiring Diagram(s) for current limits for a specific configuration. UL Classified: Under UL File Number E113724 CSA CE: compliant for all applicable directives NOTICE Agency Certifications Pollution Degree 2 Environmental Rating IP20 PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (3) Conversion: 1771-IAD to 1756-IA16 V. Wiring Diagrams WARNING There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and input module). Read and understand these considerations before installation. Conversion Module 1492-CM1771-LD001 Terminal A Terminal B Terminal C Terminal D Input 00 Input 01 Input 02 Input 03 Input 04 Input 05 Input 06 Input 07 Input 10 Input 11 Input 12 Input 13 Input 14 Input 15 Input 16 Input 17 Terminal E L1 L2 Cable 1492-CONCAB005X A B C D 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17 E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 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 1756-IA16 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 L2-0 L2-0 IN-0 IN-1 IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 IN-12 IN-13 IN-14 IN-15 L2-1 L2-1 1771-WH Swing Arm From 1771-IAD Conversion Module Installation and Application Considerations This Bul. 1492 cable consists of a cable wired to one 1756-IA16 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M). See table 2 for other lengths. The input delay times for the 1771-IAD module versus the 1756-IA16 module are as follows: a) Off-to-On Delay b) On-to-Off Delay 1771-IAD 5ms (+/-3ms) @120VAC 25ms (+/-5ms) 1756-IA16 w/ 1492-CONCAB005X 10ms max (plus selectable filter) 8ms max (plus selectable filter) The 1771-IAD module is rated 79V to 138V AC or DC. The 1756-IA16 module is rated 74V to 132V AC. If the input source voltage is DC use a 1756-IH16l and 1492-CM1771-LD002 conversion module. Refer to your 1771-IAD and 1756-IA16 Installation Manual wiring schematics and diagrams for more details. [Reference Doc: 41170-925 (Version 02)] PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (4) Conversion: 1771-IBD to 1756-IB16 V. Wiring Diagrams (Continued) WARNING There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and input module). Read and understand these considerations before installation. Conversion Module 1492-CM1771-LD001 Terminal A Terminal B Terminal C Terminal D Input 00 Input 01 Input 02 Input 03 Input 04 Input 05 Input 06 Input 07 Input 10 Input 11 Input 12 Input 13 Input 14 Input 15 Input 16 Input 17 Terminal E + - Cable 1492-CONCAB005X A B C D 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17 E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 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 1756-IB16 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 GND-0 GND-0 IN-0 IN-1 IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 IN-12 IN-13 IN-14 IN-15 GND-1 GND-1 1771-WH Swing Arm From 1771-IBD Conversion Module Installation and Application Considerations This Bul. 1492 cable consists of a cable wired to one 1756-IB16 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M). See table 2 for other lengths. The input delay times for the 1771-IBD module versus the 1756-IB16 module are as follows: a) Off-to-On Delay b) On-to-Off Delay 1771-IBD 1ms 1ms 1756-IB16 w/ 1492-CONCAB005X 1ms (plus selectable filter) 2ms (plus selectable filter) Refer to your 1771-IBD and 1756-IB16 Installation Manual wiring Schematics and diagrams for more details. [Reference Doc: 41170-926 (Version 02)] PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (5) V. Wiring Diagrams (Continued) WARNING Conversion: 1771-ICD to 1756-IC16 There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and input module). Read and understand these considerations before installation. Conversion Module 1492-CM1771-LD001 + -- Terminal A Terminal B Terminal C Terminal D Input 00 Input 01 Input 02 Input 03 Input 04 Input 05 Input 06 Input 07 Input 10 Input 11 Input 12 Input 13 Input 14 Input 15 Input 16 Input 17 Terminal E Cable 1492-CONCAB005X A B C D 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17 E 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1756-IC16 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 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 RTN RTN IN-0 IN-1 IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 IN-12 IN-13 IN-14 IN-15 RTN RTN 1771-WH Swing Arm From 1771-ICD Conversion Module Installation and Application Considerations This Bul. 1492 cable consists of a cable wired to one 1756-IC16 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M). See table 2 for other lengths. The input delay times for the 1771-ICD module versus the 1756-IC16 module are as follows: a) Off-to-On Delay b) On-to-Off Delay 1771-ICD 6ms (+/-2ms) 20ms (+/-1ms) 1756-IC16 w/ 1492-CONCAB005X 1ms max (plus selectable filter) 4ms max (plus selectable filter) The 1771-ICD module is rated 20V to 60V AC or DC. The 1756-IC16 module is rated 30V to 60V DC. Refer to your 1771-ICD and 1756-IC16 Installation Manual wiring schematics and diagrams for more details. [Reference Doc: 41171-001 (Version 00)] PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (6) V. Wiring Diagrams (Continued) WARNING Conversion: 1771-IND to 1756-IN16 There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and input module). Read and understand these considerations before installation. Conversion Module 1492-CM1771-LD001 L1 L2 Terminal A Terminal B Terminal C Terminal D Input 00 Input 01 Input 02 Input 03 Input 04 Input 05 Input 06 Input 07 Input 10 Input 11 Input 12 Input 13 Input 14 Input 15 Input 16 Input 17 Terminal E A B C D 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17 E Cable 1492-CONCAB005X 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1756-IN16 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 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 L2-0 L2-0 IN-0 IN-1 IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 IN-12 IN-13 IN-14 IN-15 L2-1 L2-1 1771-WH Swing Arm From 1771-IND Conversion Module Installation and Application Considerations This Bul. 1492 cable consists of a cable wired to one 1756-IN16 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M). See table 2 for other lengths. The input delay times for the 1771-IND module versus the 1756-IN16 module are as follows: a) Off-to-On Delay b) On-to-Off Delay 1771-IND 35ms (+/-10ms) @24V AC 45ms (+/-15ms) 1756-IN16 w/ 1492-CONCAB005X 10ms max (plus selectable filter) 10ms max (plus selectable filter) The 1771-IND module is rated 24V AC or DC. The 1756-IN16 module is rated 10V to 30V AC. Refer to your 1771-IND and 1756-IN16 Installation Manual wiring schematics and diagrams for more details. [Reference Doc: 41170-002 (Version 00)] PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E (7) V. Wiring Diagrams (Continued) WARNING Conversion: 1771-IND1 to 1756-IN16 There are several key application considerations and system specifications (bottom of drawing) when using these components (conversion module, cable and input module). Read and understand these considerations before installation. Conversion Module 1492-CM1771-LD001 Terminal A Terminal B Terminal C Terminal D Input 00 Input 01 Input 02 Input 03 Input 04 Input 05 Input 06 Input 07 Input 10 Input 11 Input 12 Input 13 Input 14 Input 15 Input 16 Input 17 Terminal E L1 L2 A B C D 00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17 E Cable 1492-CONCAB005X 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1756-IN16 10 9 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 20 19 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 L2-0 L2-0 IN-0 IN-1 IN-2 IN-3 IN-4 IN-5 IN-6 IN-7 IN-8 IN-9 IN-10 IN-11 IN-12 IN-13 IN-14 IN-15 L2-1 L2-1 1771-WH Swing Arm From 1771-IND1 Conversion Module Installation and Application Considerations This Bul. 1492 cable consists of a cable wired to one 1756-IN16 RTB. Recommended cable lengths of 0.5M or 1.0M (005=0.5M, 010=1.0M). See table 2 for other lengths. The input delay times for the 1771-IND1 module versus the 1756-IN16 module are as follows: a) Off-to-On Delay b) On-to-Off Delay 1771-IND1 25ms (+/-5ms) @48V AC 35ms (+/-10ms) 1756-IN16 w/ 1492-CONCAB005X 10ms max (plus selectable filter) 10ms max (plus selectable filter) The 1771-IND1 module is rated 48V AC. The 1756-IN16 module is rated 10V to 30V AC. Refer to your 1771-IND1 and 1756-IN16 Installation Manual wiring schematics and diagrams for more details. [Reference Doc: 41170-003 (Version 00)] PN-114270 DIR 10000060084 (Version 01) Publication 1492-IN035B-EN-E Printed in U.S.A. ">

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Key features
- Converts 1771 I/O to 1756
- No field wire removal
- Easy mounting
- Compatible with various modules
- Multiple cable lengths
Frequently asked questions
The 1492-CM1771-LD001 conversion module is compatible with various Bulletin 1771 digital I/O modules, including 1771-IAD, 1771-IBD, 1771-ICD, 1771-IND, and 1771-IND1. You can find a complete list of compatible modules in Table 2 of the viewed document.
The standard cable length is 0.5M (1492-CONCAB005X). You can also choose a 1.0M cable (1492-CONCAB010X). Refer to the footnotes in Table 2 of the viewed document for more details.
The maximum number of Conversion Modules you can install in a 1492 Conversion Mounting Assembly depends on the specific Assembly model. The table in Section II of the viewed document shows the maximum number of Conversion Module slots for each model.