Overview

The ABB 1MRK000284-AA is a binary input module from the Relion® series, engineered for precise signal acquisition in high-reliability environments such as power substations, process plants, and distributed control systems. It accurately detects binary states like open/closed contacts, pushbutton activations, and relay positions across a wide voltage range.

Each input channel is galvanically isolated, protecting the system from electrical noise and transient faults. The module also supports real-time monitoring, event logging, and alarm triggering, making it suitable for safety-critical applications.

Its compact and modular design allows seamless integration into ABB protection relays and control cabinets. Engineers value its robust construction, long service life, and IEC standard compliance.

Technical Data

Typical Applications

The 1MRK000284-AA is commonly used in:

• Substation automation: monitoring breaker positions, isolator statuses, and relay outputs. Example: tracking open/close status of multiple 220 kV circuit breakers and triggering alarms during faults.

• Industrial control panels: monitoring emergency stop buttons, limit switches, and interlock signals.

• Event-driven automation: integration with Relion® protection relays for fault diagnostics, alarms, and system-wide coordination.

Its high isolation and wide voltage range make it suitable for mixed-voltage systems and retrofit projects.

FAQ

Q1: What type of signals does the 1MRK000284-AA monitor?
A1: Binary signals such as switch positions, pushbuttons, and relay contacts.

Q2: How many input channels are available?
A2: 24 isolated digital input channels.

Q3: What voltage range is supported?
A3: 24–250 VDC, depending on configuration.

Q4: Is it suitable for substation automation?
A4: Yes, it is designed for high-reliability substation and industrial control systems.