Allen-Bradley 700-CF400D Control Relay

The Allen-Bradley 700-CF400D MCS-CF IEC control relay is a four-pole, four normally open (NO) device designed for compact control circuits in industrial automation, and is commonly used in process and discrete control applications. It uses a 110 V AC coil rated for 50 Hz or 60 Hz operation and provides four independent NO contacts for routing multiple control signals from a single relay—helping reduce panel clutter and wiring complexity. As part of the 700-CF family, the relay serves as the interface between a PLC or logic module and field devices, enabling safe isolation and reliable actuation of downstream relays, interlocks, or signaling devices. The 700-CF400D is designed to withstand industrial control environments and supports standard IEC control wiring practices, making it a drop-in component for new panels or retrofit projects. Typical applications include machine-control panels, sequencing, fault interlock logic, and other IEC-based control schemes where four discrete NO paths are required in a single compact package.