The Allen-Bradley 1771-IGD is a digital input module from the PLC-5 series designed for TTL logic-level applications. It provides sixteen (16) 5V DC TTL-compatible input channels and is optimized for interfacing with low-voltage digital circuits. The module operates with ON-state voltage levels between -0.2 to +0.8 VDC (Low/True) and OFF-state levels between 2.0 to 5.25 VDC. Designed for precision signal processing, the 1771-IGD installs into a standard 1771 I/O chassis and uses the 1771-WH wiring arm for secure electrical connections. It was discontinued by the manufacturer on December 30, 2020. Manufacturer Rockwell Automation Brand Allen-Bradley Part Number 1771-IGD Product Type Digital Input Module Series PLC-5 Number of Inputs 16 Input Type TTL Input Voltage Range 2.0 to 5.25 VDC (OFF), -0.2 to +0.8 VDC (ON) Logic Level Low/True Wiring Arm 1771-WH Mounting 1771 I/O Chassis Status Discontinued (12/30/2020)
