ABB 1MRK000284-AA Relion® Binary Input Module Digital I/O

Product Overview

The ABB 1MRK000284-AA is a Binary Input Module within the Relion® protection and control family. Designed for substation automation and power system protection, it monitors the status of switches, pushbuttons, and sensors to provide precise digital signal acquisition. This module ensures accurate, real-time monitoring and reliable interfacing between field devices and the control logic.

Its compact form factor supports DIN rail or panel mounting, while robust galvanic isolation protects sensitive electronics from voltage surges in high-voltage environments.

Product Description

The 1MRK000284-AA serves as a digital interface for protection relays, capturing binary signals from high-voltage switchgear, circuit breakers, disconnectors, and manual inputs. Each of the 24 input channels is configurable, and signals are transmitted to the main relay unit for processing. The module includes LED indicators for real-time channel status, along with a test button for diagnostics.

The "AA" revision specifies a hardware variant with predefined input voltage thresholds and relay output capacity, ensuring compatibility with ABB COMBIFLEX systems.

Key Features

High-Speed Signal Detection

• Millisecond response time suitable for fast protection schemes.

• Debounce filtering prevents false triggers from mechanical contacts.

Electrical Safety and Isolation

• Galvanically isolated inputs safeguard the control electronics from high-voltage transients.

• High dielectric strength ensures reliability in demanding substation environments.

Flexible Voltage Support

• Handles a wide input range from 24 VDC up to 250 VDC depending on configuration.

• Low power consumption minimizes load on station batteries.

Diagnostics and Reliability

• Integrated self-monitoring triggers alarms if any internal fault occurs.

• LED indicators provide visual confirmation of input status for field personnel.

Mounting and Integration

• Compatible with DIN rail and panel installation.

• Seamlessly integrates with Relion® relay systems for monitoring and protection.

Technical Specifications Table

Applications

• Monitoring status of circuit breakers, disconnectors, and pushbutton commands in substations.

• Integration with Relion® COMBIFLEX relays for power system protection.

• Digital signal acquisition for control systems in high-voltage automation environments.

FAQ

Q1: Can this module handle multiple voltage standards?
A1: Yes, the 1MRK000284-AA can accommodate a range of DC voltages up to 250 V depending on the sub-model.

Q2: How does the module indicate input activity?
A2: Each channel has a dedicated LED, and a test button allows manual verification of signal paths.

Q3: Is hot-swapping supported?
A3: Hot-swap depends on the relay rack configuration; always follow ABB safety and LOTO procedures.