Overview
The ABB RXMM 1 RK214004AN auxiliary relay is an industrial-grade electromechanical relay engineered for control, signaling, and protection circuits in substation and industrial automation environments. As part of ABB’s RXMM series, this relay delivers dependable performance in demanding applications requiring high operating requirements and reliable contact switching. The RK214004AN designation indicates a specific coil voltage and contact configuration optimized for DC control circuits.
Key Features
- 4 change-over (3PDT) contact configuration for flexible circuit control
- Plug-in design for rapid installation and replacement without extensive rewiring
- Robust construction for high-reliability industrial environments
- Designed to handle heavy contact duty cycles and frequent switching operations
- Compatible with 35mm DIN rail mounting systems and standard relay sockets
- Manual or automatic operation depending on control circuit configuration
Technical Specifications
- Relay Type: Auxiliary (All-or-Nothing) Relay
- Series: RXMM 1
- Part Number: RK214004AN
- Contact Configuration: 4 Change-Over Contacts (3PDT)
- Mounting: Plug-in (Socket-Mount)
- Housing: Standard industrial plastic/resin enclosure
- Operating Temperature: -10°C to +55°C (typical industrial range)
- Coil Power: DC nominal voltage (standard variants: 24V, 48V, 110-125V, or 220-250V DC)
- Contact Rating: Heavy breaking duty rated
- Standards Compliance: IEC, UL, CSA standards for industrial relays
Typical Applications
The RXMM 1 auxiliary relay is commonly deployed in:
- Substation protection and control systems requiring high-reliability auxiliary switching
- Industrial automation and motor control circuits
- Emergency shutdown and safety interlocking systems
- PLC input/output signal conditioning and isolation
- Process control circuits in manufacturing and utility environments
Compatibility & Replacements
The RXMM 1 is part of ABB’s established auxiliary relay platform. When specifying replacements or upgrades, consult ABB’s replacement matrix tables, as the company has standardized on successor models (RXMB and RXMC series) for new installations. The RK214004AN variant is backward-compatible with legacy RXMM control circuits and integrates directly with existing socket-based relay installations. Verify coil voltage and contact rating requirements before ordering replacement units. For specific interchangeability questions, reference ABB’s technical documentation or contact ABB customer support.
