Allen-Bradley 1336-GM2 Industrial Communication Module

Allen-Bradley 1336-GM2 Industrial Communication Module is a drive-mounted serial interface option for the 1336 PLUS II family of AC drives. It provides RS-232, RS-422, and RS-485 communication capabilities and supports DF1 and DH485 protocols, enabling direct serial linking between the drive and PLCs or other serial devices on a network. The GM2 is a PCB assembly described as RS232/422/485 and is powered by the drive it attaches to, eliminating a separate power supply. Compatible with 1336 PLUS II drives (GM1, GM2, GM5) as documented for this family, it is designed for legacy automation setups where DF1/DH485 serial networks are in use. Typical applications include drive-to-PLC communication, remote diagnostics, and interfacing serial devices such as PLCs, HMIs, or auxiliary controllers within an automation cabinet, providing a compact, drive-mounted solution for reliable data exchange. By embedding serial networking directly in the drive, the GM2 helps simplify wiring and integration in systems that rely on Allen-Bradley’s DF1 and DH485 protocols, supporting streamlined communication paths in industrial control architectures.