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Eliwell EWPlus 974 Refrigeration Controller
A professional electronic temperature controller from the EWPlus series, designed for comprehensive control of refrigerated cabinets and refrigeration equipment. It enables independent control of the compressor, evaporator fan, and defrosting process.
Key features and functions:
- 3 output relays: compressor (Cool), defrost (Defrost), and fan (Fan)
- Two NTC measurement inputs (Pb1 – cabinet, Pb2 – evaporator) and 1 digital input (D.I.)
- Integrated TTL port for quick programming using a Copy Card
- ECO operating mode activated by a dedicated button on the front panel
- Quick and easy panel mounting in a standard 71 x 29 mm cutout
Technical specifications
| Parameter | Value |
|---|---|
| Manufacturer | Eliwell |
| Series / Model | EW974 |
| Power supply | 230V~ 4.5W 50/60Hz |
| Operating range / Function | Cool / -5T55 |
| Compressor relay load (Comp.) | EN 60730-1: 12(8)A max 250Vac | UL 60730: 2HP (12FLA 72LRA) max 240Vac |
| Defrost relay load (Def.) | NO 8(4)A / NC 6(3)A max 250Vac |
| Fan relay load (Fan) | NO 5(2)A max 250Vac |
| Maximum terminal load | 17A Max |
| Measurement / digital inputs | 2x NTC (Pb1, Pb2), 1x D.I. (Digital input) |
| Communication port | TTL (for Copy Card) |
| Standards compliance | EN 13485 SA1 |
| Country of manufacture | Italy (Made in Italy) |
Electrical wiring diagram (EW974)
- Terminal 1-2 / 1-3: Defrost relay output (Def.)
- Terminal 1-4: Compressor relay output (Comp.)
- Terminal 1-5: Fan relay output (Fan)
- Terminal 6-7: Main power supply, 230V AC
- Terminal 8-9: Cabinet temperature sensor (Pb1 - NTC)
- Terminal 8-10: Evaporator / defrost temperature sensor (Pb2 - NTC)
- Terminal 8-11: Digital input (D.I.)