Technical Specifications Control signal input terminals, multi‑group isolated relay contact output terminals. Auxiliary DC control power supply. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Relay contact with rated load capacity.
Functional Features Receives external drive control signal. Drives internal mechanical relay to act and switch isolated output contacts. Realizes electrical isolation between control input side and contact output side. Front‑panel status LED indicators reflect relay actuation state. Built‑in self‑diagnosis monitors module power‑on condition.
Application Scenarios Spare auxiliary relay module for substation secondary control cabinet. Used for signal expansion and interlock circuit of protection relay system.
Performance Parameters Stable relay contact actuation performance. Reliable electrical isolation characteristic. Durable contact switching life performance.
Material Composition Flame‑retardant plastic module housing. Internal printed circuit board, mechanical relay assemblies and signal conditioning circuit. Screw‑type wiring terminals and DIN‑rail mounting buckle.
Structural Characteristics Standard DIN‑rail module structure. Front panel fitted with status indicator lamps. Input‑output wiring terminals arranged on module top and bottom edges. DIN‑rail buckle located on rear side.
Working Principle After obtaining auxiliary power supply, RER133 monitors input control signal. When effective drive signal is received, internal relay coil energizes, contact position changes and completes output signal switching.
Installation Requirements Cut off auxiliary control power before replacement. Snap RER133 onto standard DIN‑rail inside cabinet. Complete control input wiring and contact output wiring according to terminal marking. Restore auxiliary power supply, apply drive signal and verify relay contact switching function.
Usage Notes Respect contact rated load parameters for external load connection. Hot‑plug under powered condition is prohibited. Check actuation indicator status after commissioning.
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