The ABB Command Output Monitoring Module Board (23BA22 1KGT004800R5002) is a sophisticated control system component designed for industrial automation applications.

This command output monitoring module performs critical validation functions in control systems. After receiving and verifying an object command, the communication unit and output board module initiate a pre-release validation sequence. The (1-out-of-n) check is activated on the command output monitoring board 23BA22, while simultaneously measuring the resistance of the interposing relay within the switched output circuit and comparing it against parameterized upper and lower limits. When the measured resistance falls within the defined range, the object command is released via binary output board 23BA20. The command output pulse timer then starts, with continuous monitoring of pulse duration. The output deactivates either by a response indication or upon timer expiration on the 23BA22. Should any test condition fail during these checks, the command is immediately cancelled. In standard RTU station applications, a single 23BA22 board is sufficient to perform the (1-out-of-n) check. For configurations involving multiple interposing relay types with differing resistance values, the 23BA22 board can support two independent check circuits, provided a separate isolated voltage source supplies the auxiliary test voltage.