Controller with Wall Mount and Outputs, 301-EM-US3

This 301-EM-US3 expansion module aligns with U.S. standards and extends the 301-series controllers' I/O capabilities. It's often deployed in commercial or institutional settings needing extra sensor inputs, relay outputs, or staging logic to support more advanced gas safety or control strategies. * Extended I/O capacity (relays and sensor inputs) * Seamless with 301 controllers in U.S. configurations * Accommodates code-required staging logic * DIN-rail or panel wireflex build * Service-friendly design for maintenance