The ABB 1MRK 000 863-AN RXMB 1 is a heavy-duty plug-in relay designed for industrial control and protection schemes. This auxiliary relay provides high-speed switching and reliable signal multiplication within the COMBIFLEX mounting system, offering high contact capacity and mechanical durability for demanding utility environments.

 

Product Parameters

• Model: RXMB 1 / 1MRK 000 863-AN
• Rated Voltage: 110-125V DC (standard variant)
• Contact Configuration: 4 Make (NO) contacts
• Power Consumption: ~1.1W (during activation)
• Operating Time: <10 ms

 

Product Specifications

• Mounting: COMBIFLEX plug-in system (1U 6C)
• Contact Material: Silver-plated or Hard-gold plated
• Weight: 0.3 kg
• Insulation Test: 2.0 kV (50 Hz, 1 min)
• Mechanical Life: 10 million operations

 

Application Fields

• Substation Control: Signal multiplication and interlocking.
• Power Generation: Alarm indication and trip circuit supervision.
• Railway Systems: Safe signal switching and automation.
• Industrial Logic: Auxiliary relaying for complex protection logic.

Product Q&A

• Q: Can the RXMB 1 be used in AC circuits?
  • A: This specific model is DC-rated; for AC applications, an external rectifier or a dedicated AC variant is required.
• Q: Is the relay sensitive to mounting position?
  • A: No, it functions reliably in any orientation within a standard COMBIFLEX rack.
• Q: How can I verify the relay status?
  • A: The relay features a transparent cover allowing visual inspection of the contact position and armature movement.

 

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