EWN974PED10B001 Eliwell EWNext 974 Defrost Controller

The EWN974PED10B001 Eliwell EWNext 974 is a high performance digital controller for ventilated refrigeration units. The unit handles both normal and low temperature applications, integrating control for compressors, defrost cycles, and evaporator fans within a single, compact panel mounted device. The EWNext 974 combines impressive energy efficiency with user friendly installation, making it the perfect replacement for older series controllers.

Technical Specifications:

• Power supply: 230 Vac
• Operating temperature: -5 to 55°C
• Protection rating: IP65

Output Characteristics:

• Out1: 12(8) A
• Out2: NO 8(4) A - NC 6(3) A - CO 6 A resistive
• Out3: 5(2) A

Input Characteristics:

• Analog inputs: 2 NTC inputs (Pb1 and Pb2**)
• Digital inputs: 1 voltage free digital input (DI2*)

Probe values:

• Display ranges: -99.9…99.9 or -999…999
• Measurement range: NTC: -50…110°C (-58…230°F) – on display with 3 digits + sign
• Accuracy: NTC: -50...-30 °C (-58...-22 °F): better than ±2.4 °C (±4.3 °F) ±1 digit. -30...110 °C (-22...230 °F): better than ±1.6 °C (±2.9 °F) ±1 digit.
• Resolution 1°C/°F or 0.1°C/°F (depending on the display range setting)
• Voltage measurement accuracy: -1% +2% of power supply rated voltage

Mechanical characteristics

• Connectors: TTL serial port for connection of compatible accessories
• Dimensions: Front panel 80.5 x 34.5 mm (3.17 x 1.36 in.), depth 60 mm (2.36 in.)
• Mounting panel thickness: 0.5...7.5 mm (0.02...0.3 in)
• Terminals: Screw terminal blocks