Overview
The ABB RXMH2 RK223069-AB is a plug-in auxiliary relay module rated for 24V DC coil voltage. This relay is built into ABB’s Combiflex protection and control system architecture and serves as a critical signaling and tripping component in electrical protection schemes across industrial automation, power distribution, and motor control applications.
Key Features
- 24V DC coil voltage for compatibility with modern control systems
- Plug-in design for quick installation and field replacement
- High-speed operation and low power consumption
- Multiple contact configurations (typically 4 make and 4 break contacts on RXMH2 variants)
- High environmental resistance and reliability in harsh conditions
- Compact design suitable for space-constrained control panels
Technical Specifications
The RXMH2 series provides robust performance across a wide voltage range and is designed to interface with ABB’s protection relays and control modules. Contact ratings and operational limits vary by specific suffix code (such as -AB, -AD, -AH, etc.). Standard RXMH2 auxiliary relays are rated for both AC and DC control voltages and feature low-dropout pickup characteristics ideal for sensitive protection applications.
Typical Applications
- Trip coil signaling in medium-voltage switchgear
- Auxiliary output contacts for motor protection relays
- Control and indication circuits in protective relay systems
- Interlocking logic in power distribution control
- Emergency shutdown and alarm circuits
Compatibility & Replacements
The RK223069 series is part of ABB’s established RXMH2 auxiliary relay platform. Variants with different suffix codes (RK223069-AD, RK223069-AH, RK223069-AT, RK223069-EP) accommodate different coil voltages (24V DC, 127V AC, 250V AC) and contact requirements. When selecting a replacement, verify the suffix code to ensure correct voltage and contact configuration. Direct interchangeability is limited to relays with identical part numbers and voltage ratings.
