Allen-Bradley PLC-5 I/O Modules (1771)

Allen-Bradley 1771 modules provide I/O for compatible installed control systems. The signal function depends on the full catalog number; analog and digital modules cannot be selected by the 1771 prefix alone.

For a replacement, identify the module and its field-wiring arm. A module listing may not include that wiring hardware. PLC-5 processors are listed separately under 1785 processors.