Overview
The Allen-Bradley 1492-CM1771-LA003 enables straightforward migration from PLC-5 1771 analog I/O architecture to ControlLogix 1756 I/O without field wiring removal. I/O Conversion Modules provide a fast and efficient method for converting 1771 PLC-5 I/O to 1756 ControlLogix I/O. The I/O conversion is accomplished without removing any field wires from the existing swing arm, virtually removing the risk of wiring errors. The existing swing arms fit directly onto the edge connector of the conversion modules.
Key Features
- Converts 1771-OFE2 analog output modules to 1756-OF6CI compatibility
- Converts 1771-OFE1 analog output modules to 1756-OF6VI compatibility
- Field wiring remains connected to swing arm throughout conversion
- No rework or risk of wiring errors during module replacement
- Compact swing-arm design for standard DIN rail cabinets
- Drop-in replacement for legacy analog I/O systems
Technical Specifications
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Part Number: 1492-CM1771-LA003
- Module Type: I/O Conversion Module (Analog Output)
- Conversion Path: 1771-OFE1/OFE2 → 1756-OF6VI/OF6CI
- Mount Type: Edge connector to 1756-OF6 series modules
- Weight: 0.40 lbs
- Condition: New in Box
- Certifications: UL, CSA (inherent to ControlLogix series)
Typical Applications
- Migration of legacy PLC-5 systems to modern ControlLogix platforms
- Retrofit of analog output control loops (voltage, current modes)
- Industrial process control systems requiring uptime-critical conversions
- Manufacturing lines running dual-architecture control systems during transition periods
- Upgrade of analog I/O instrumentation without field rewiring
Compatibility & Replacements
The 1492-CM1771-LA003 is a specialized conversion module designed specifically for analog output module migration. No direct replacement exists; however, it works in conjunction with 1756-OF6CI and 1756-OF6VI analog output modules. This module is complementary to digital I/O conversion modules (1492-CM1771-LD series) for complete system upgrades. When upgrading analog output control from PLC-5 to ControlLogix, confirm the source 1771 module type (OFE1 vs. OFE2) to ensure correct 1756 target module selection.
