ABB 1MRK000173-CCR00 I/O PCB – 1500V RMS Channel Isolation, DIN/Rack Mount, -25°C to +70°C

Product Overview

The ABB 1MRK000173-CCR00​ is a binary input/output system module (I/O PCB) that lives inside ABB protection cubicles, plant-auxiliary (厂用电) control cabinets, and switchgear panels where the job is simple but unforgiving: collect the breaker-auxiliary contacts, trip-circuit supervision signals, pushbutton commands, and limit-switch states from the field, then drive relay coils, contactor coils, annunciator lamps, and trip-release solenoids on the way out. The 1MRK prefix places this board in ABB’s protection/relay accessory lineage—closely associated with RE_615-class protection devices and the broader ABB control architecture used in power-plant auxiliary systems, medium-voltage switchgear, and industrial process protection cabinets. The “CCR00” suffix denotes this specific hardware revision of the system-module family; ABB uses the 1MRK000173 base code across multiple CCRxx revisions, so matching the suffix matters on replacement.Physically the ABB 1MRK000173-CCR00​ is a PCB-form module rather than a DIN-terminal-block I/O block—more like an internal interface card that plugs or bolts into the cabinet’s dedicated mount (DIN-rail clip or rack slot depending on cabinet builder). Swiss manufacturing is called out consistently across supplier data, which matters because the trace geometry, conformal coating, and connector retention on these boards are specified for vibration-heavy switchgear environments where a generic third-party copy would fatigue faster. Electrical spec centers on 24–30 V DC operation, ~50 mA per DI channel typical, and 1500 V RMS isolation (channel-to-channel and channel-to-ground), which is what lets the 1MRK000173-CCR00​ sit between noisy switchgear potential and the sensitive logic side without crosstalk.DI/DO channel count on the ABB 1MRK000173-CCR00​ varies by hardware build: the commonly catalogued version is 8 DI + 12 DO​ (10 standard DO + 2 special/dedicated outputs), while some regional SKUs and later builds are quoted as 16 DI + 16 DO—both appear in the 1MRK000173-CCR00 label stream, so verifying the old board’s silkscreen before ordering is part of the buyer’s checklist. Communication-wise the board supports Modbus and Profibus in configurations where the binary I/O needs to report upward to a PLC/DCS master; in pure protection-cabinet roles it may be hard-wired only, with no bus—the 1MRK000173-CCR00​ is flexible enough for both.In the cabinet hierarchy, the ABB 1MRK000173-CCR00​ is the “switch-language translator”: breakers speak in dry-contact closures and 110/220 V aux potential, the protection relay or PLC speaks 24 V DC logic—this board sits in between, opto-isolated, driving interposing relays or being driven by them. For MRO teams on 15–25-year-old ABB protection lineups, the 1MRK000173-CCR00​ is the classic “channel-dead or ghosting-DI” swap-out: when a breaker’s auxiliary refuses to show up on the SCADA or the trip-logic output won’t fire the annunciator, and loop-check confirms the field wiring is fine, the board is the usual suspect. Drop-in, same wiring definition, no point-table rework—that’s the value prop.