Technical Specifications Multi‑channel serial communication interface. Auxiliary power supply 24‑250 V DC. Typical power consumption 3.7 W. Operating temperature ‑25 ℃ to +70 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Module surface IP20. Complies with substation communication related standards.
Functional Features Realizes data collection from multiple SPA series protection relays. Completes communication protocol conversion. Supports data uploading to upper monitoring host. Front‑panel LED indicators display communication and running status. Built‑in communication fault diagnosis function.
Application Scenarios Used for communication networking of SPA series protection relays in power plant and distribution substation. Applied for old substation automation reconstruction and spare‑part replacement.
Performance Parameters Communication data transmission keeps stable. Supports multi‑device data polling. Diagnosis function can capture communication loop fault. LED status indication reflects running condition accurately.
Material Composition Glass‑fiber epoxy printed circuit board. Communication processing chip, isolation circuit components. Screw‑type communication and power terminals. Reinforced plastic module housing. Copper‑alloy connector contact pieces.
Structural Characteristics DIN‑rail mounting module structure. Front panel arranges communication status LED indicators. Both sides are equipped with wiring terminals. Module dimension conforms to standard DIN‑rail installation specification. Weight approximately 0.39 kilogram.
Working Principle After power‑on, module completes hardware self‑check. It polls each connected SPA protection relay through serial communication circuit. It collects measurement value, fault record and device status information, completes protocol conversion and uploads data to upper monitoring system. Diagnosis circuit monitors communication link state continuously.
Installation Requirements Fix module on standard DIN‑rail inside cabinet. Connect 24‑250 V DC auxiliary power supply. Complete communication wiring between module and protection relays, as well as wiring to upper host system. Ensure cabinet protective grounding.
Usage Notes Take anti‑static protection before touching circuit board. Disconnect power supply before wiring modification. Keep communication cable away from high‑voltage power cable. Periodically check terminal tightening condition.
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