Allen-Bradley 700-RM400A2 Magnetic Latching Relay

Allen-Bradley 700-RM400A2 Magnetic Latching Relay is a magnetically latched control relay from Rockwell Automation’s Bulletin 700 RM family, designed for industrial automation tasks where a maintained state is beneficial. It employs separate latch and reset windings to set or reset the contact state, allowing it to retain its position after power is removed and reducing continuous hold current in suitable circuits. The RM400A2 variant is listed with AC coil operation, aligning with the 700 RM line’s approach to memory-enabled switching for sequencing, interlocking, and safety-related control logic. This type of relay is commonly used in control panels to manage loads and to preserve last-known states in machine sequences, enhancing reliability in the event of brief power interruptions. Exact specifications—such as contact form, number of poles, and coil ratings—are model-specific, so consult the official 700-RM400A2 datasheet or product page to verify compatibility with your application.