This manual covers the Zelio Control RM4 family of control relays, including the three‑phase RM4‑T, voltage‑monitoring RM4‑UA/UB, current‑monitoring RM4‑JA and level‑monitoring RM4‑L models. It offers detailed technical data, installation guidance, wiring diagrams and functional descriptions to help users select and operate the relays safely.
Key sections include technical features, environmental and electrical ratings, LED status indicators, wiring and connection details, and a quick‑selection table. Compliance with IEC standards and relevant certifications are also listed. This manual is written in Chinese.
| Operating temperature range | -20 °C to +65 °C |
|---|---|
| Storage temperature range | -40 °C to +85 °C |
| Ingress protection (IP) rating | IP50 |
| Rated insulation voltage | 500 V |
| Rated voltage | 250 V |
| Mechanical life | 30 million operations |
| Electrical life (resistive load) | 1.5 million operations |
| Contact material | Nickel‑silver 90110 |
The RM4 relays operate from –20 °C up to +65 °C.
Yellow LED indicates relay output status, red LED shows undervoltage fault, green LED shows power presence, and red LED also indicates over‑voltage or imbalance depending on the model.
The RM4‑T relay does not need a separate supply; it is powered through the L1, L2, L3 terminals that connect to the three‑phase supply.
The relays have an IP50 enclosure rating and are rated for storage temperatures from –40 °C to +85 °C and operating temperatures from –20 °C to +65 °C.