USM sockets form the wiring interface for URM plug-in relays. The two-changeover and four-changeover versions provide different terminal layouts. Choose a socket that matches the relay configuration and the required field wiring method.
| Socket model | Relay configuration | Matching relay family | Connection |
|---|---|---|---|
| USM-2E | 2 changeover contacts (2CO) | URM2 | Screw, protected socket |
| USM-4E | 4 changeover contacts (4CO) | URM4 | Screw, protected socket |
| USM-2P | 2 changeover contacts (2CO) | URM2 | Push-in |
| USM-4P | 4 changeover contacts (4CO) | URM4 | Push-in |
| Model | Socket current rating | Socket voltage rating | Conductor cross-section | Screw torque |
|---|---|---|---|---|
| USM-2E | 10A | 300VAC | 0.5-2.5mm² | 1.0N·m |
| USM-4E | 7A | 250VAC | 0.5-2.5mm² | 1.0N·m |
| USM-2P | 12A | 300VAC | 0.5-2.5mm² | Not applicable |
| USM-4P | 10A | 300VAC | 0.5-2.5mm² | Not applicable |
The socket and relay are separate components. Check the fitted relay for its coil voltage and load-specific switching capacity; socket current and voltage ratings do not replace the relay ratings.
| Model | Coil-to-contact withstand voltage | Between-contact withstand voltage | Ambient temperature | Weight |
|---|---|---|---|---|
| USM-2E | 2000V | 2000V | -40°C to +65°C | 34g |
| USM-4E | 2000V | 2000V | -40°C to +65°C | 52g |
| USM-2P | 4000V | 2500V | -45°C to +85°C | 46g |
| USM-4P | 4000V | 2500V | -40°C to +85°C | 48g |
The duration of the dielectric withstand tests is not specified.
