I90 Power Entry Circuit Breakers.
Also p/n PIPECB11, YIPECB11.
The Bailey Controls IPECB11 is an discontinued power entry circuit breaker used in the ABB Bailey Infi 90 and Net 90 industrial automation systems. It provides overcurrent protection, power switching capabilities (120/240 VAC at 20A), and input/output (I/O) expansion.