ABB 1MRK000173-BCR00 ControlI/O Binary Input Module

The ABB 1MRK000173-BCR00 (1MRK000173-BCR00) is a high-density, optically isolated binary input card developed for ABB’s substation automation platforms, bay control assemblies, and Relion® series Intelligent Electronic Devices (IEDs). This hardware monitors discrete field states—such as circuit breaker auxiliary contacts, disconnector switches, and external trip commands—converting raw high-voltage substations telemetry into deterministic digital signals.

Hardware Specifications

Optocoupler Isolation and Transient Suppression Mechanics

The 1MRK000173-BCR00 utilizes a rugged channel architecture where every independent binary input circuit is protected by its own optocoupler. When an external DC voltage loop closes (e.g., a breaker contact closes), current passes through an internal current-limiting resistor network and illuminates an internal LED, passing the state change across a physical gap to a phototransistor.

This optical barrier prevents extreme high-voltage surges, lightning transients, and inductive switching spikes from passing into the sensitive microprocessor bus.

Frequently Asked Questions

Q: What is the main difference between a standard PLC input card and this substation-grade binary module?

A: Substation binary input modules like the 1MRK000173-BCR00 are built to meet strict IEC 60255 standards. They handle high ambient temperatures, wide DC battery voltage fluctuations, and severe electromagnetic interference (EMI) without generating ghost trips or dropping data packets.

Q: How do you adjust the input threshold voltage to match station battery banks?

A: The activation threshold is set using physical jumpers on the board or through software configuration in ABB’s PCM600 tool. Proper threshold adjustments ensure that the card ignores induced AC leakage voltages across long field cables while cleanly reading legitimate DC battery signals.

Q: Can this specific card be hot-swapped while the main protective IED is monitoring an active feeder?

A: No. Removing or inserting an IED module while the bay controller is powered can disrupt the internal processor bus, cause a temporary watchdog reset, or drop protection loops. Always power down the subrack before replacing the card.

Field Installation Guidelines

• Anti-Static (ESD) Handling: This high-speed computing board contains static-sensitive logic components. Work only on a certified ESD mat and attach a grounded wrist strap before extracting the module from its protective shielding.
• Guide Rail Seating: Align the card accurately within the slot channels of the main IED or bay control chassis. Smoothly push the module back until the multipin header engages with the backplane bus, then secure the front-panel mounting screws.
• Input Cable Shielding: Connect all digital input lines using twisted, shielded control cables. Ground the cable shields at the cubicle’s entry earth bulkhead panel to drain away high-frequency noise from high-voltage switchgear operations.
• Adjusting Debounce Software Filters: Configure the debounce filter timers in the IED software to match your target contact mechanics. Setting a 3 to 5 ms filter prevents mechanical contact bounce from creating false double-trigger events in your event logging timeline.