ABB RLM01 Logic Module

Product Brief Introduction RLM01 is plug‑in logic processing module for ABB relay protection system. It provides auxiliary logic operation, signal latch and contact output function for protection bay. It receives binary signals from other protection units, executes preset logic calculation and outputs dry‑contact signals for alarm and interlock loop. It installs inside standard relay rack cabinet.
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Technical Specifications Multi‑channel binary signal acquisition, configurable logic gate function, relay dry‑contact output. Binary input rated 24‑250 V DC. Relay contact rating 250 V AC / 5 A resistive load. Auxiliary power supply 24‑250 V DC. Typical power consumption 4.2 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel protection grade IP30, rear connector area IP20. Complies with CE and IEC secondary relay standards.

Functional Features Receives external fault and status binary signals. Implements configurable logic‑gate and signal‑latch processing. Drives high‑reliability electromagnetic relay for alarm and interlock output. Front‑panel LED indicators display module power status and relay action state. Built‑in power‑supply self‑monitoring function gives prompt for power supply abnormality.

Application Scenarios Mounted in protection relay rack cabinet. Used for logic expansion, signal latching and interlock logic implementation in traditional power substation protection system. Widely applied for equipment retrofitting and spare‑part replacement projects.

Performance Parameters Relay mechanical service life reaches 10000000 operations. Signal response time stays at millisecond level. Contact switching capacity satisfies secondary circuit load requirement. Power supply fault triggers corresponding LED alarm indication.

Installation Requirements Insert module into standard relay rack slot and tighten locking screw. Connect auxiliary power supply within rated voltage range. Complete binary input‑output wiring strictly according to engineering schematic drawing. Ensure reliable protective grounding of rack. Check front‑panel LED working condition after power‑on.

Usage Notes Take anti‑static protection before plug‑in operation. Module plug‑unplug under powered condition is forbidden. Periodically inspect terminal tightening status and relay contact burning condition. Prevent dust accumulation and corrosive gas erosion. Replace aging module according to station maintenance cycle.




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