ABB GJR5251400R3202 Advant Controller 31 I Unit is a digital input module designed to expand an Advant Controller 31 system. It connects to the CS31 system bus and accepts 24 V DC digital inputs, enabling the controller to read on/off signals from field devices such as limit switches and proximity sensors. This I Unit provides 0–24 V level compatibility for reliable sensing in decentralized automation setups, helping to wire sensors directly to the controller without a separate local PLC channel. Ideal for applications where expanding the central controller’s input capability is required in compact industrial control cabinets.
