Technical Specifications Multi‑group relay contact output. Input drive signal 24‑250 V DC. Each relay contact rated 250 V AC / 5 A resistive load. Auxiliary power supply 24‑250 V DC. Typical power consumption 4.8 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Front‑panel IP30, rear connector area IP20. Complies with CE and IEC secondary relay standards.
Functional Features Receives external drive binary signal. Drives multiple groups of independent dry‑contact relay output. Realizes signal expansion for alarm, interlock and trip auxiliary loop. Front‑panel LED indicators show each relay action state. Simple power‑supply self‑monitoring function.
Application Scenarios Mounted in substation protection relay rack. Used for contact quantity expansion of traditional relay protection equipment. Suitable for old substation renovation and spare‑part replacement projects.
Performance Parameters Relay mechanical service life reaches 10000000 operations. Signal response time maintains millisecond‑level. Contact switching capacity meets secondary circuit load requirement. Power‑supply fault triggers LED alarm indication.
Material Composition Glass‑fiber epoxy printed circuit board. Electromagnetic relay components, signal processing circuit. Screw‑type wiring terminals. Reinforced plastic module housing. Copper‑alloy contact components for relay and back‑plane connector.
Installation Requirements Insert module into standard relay rack slot and tighten locking screw. Connect auxiliary power supply within rated voltage range. Complete external contact loop wiring strictly according to engineering drawing. Guarantee reliable protective grounding for rack. Check LED relay action indication after power‑on.
Usage Notes Take anti‑static measures before module operation. Hot‑plug under powered condition is forbidden. Periodically inspect terminal tightening condition and relay contact burning status. Avoid dust accumulation and corrosive gas environment. Replace aging module according to maintenance cycle.
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