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TECHNICAL SPECIFICATIONS (EN 60730-2-9)
Classification: operating (not safety) device for incorporation
Mounting: panel mounting with 71x29 mm (+0.2/-0.1 mm) drilling template.
Type of action: 1.B
Pollution class: 2
Material class: IIIa
Overvoltage category: II
Nominal pulse voltage: 2500V
Temperature: Use: –5 … +55 °C - Storage: -30 … +85 °C
Power supply: EWPlus 978: 230Va (±10%) 50/60 Hz
EWKPlus 978: 115Va (±10%) 50/60 Hz or 230Va (±10%) 50/60 Hz
Power consumption: EWPlus 978: 4,5W max
EWKPlus 978 (115Va and 230Va): 4,0W max
Digital outputs (relay): refer to the label on the device
Fire resistance category: D
Software class: A
NOTE: check the power supply rating on the device’s label; contact our Sales Office for power and relay ratings.
FURTHER INFORMATION
Input Characteristics
Display range: NTC: -50.0°C ... +110°C (on 3-digit display with +/- sign)
Accuracy: Better than 0.5% of full-scale +1 digit.
Resolution: 0.1 °C
Buzzer: NO
Analogue Inputs: 2 NTC*
Digital Inputs: EWPlus 978: 2 voltage-free digital inputs (D.I.1 and D.I.2)
EWKPlus 978: 1 voltage-free digital input (D.I.1)
NOTE: - (*) D.I.1 can also be configured as a probe input (H11 = 0 e H43 = y)
- D.I.2, if activated, should be connected to terminals 1-2 of the TTL connector (H12≠0)
Output Characteristics
Digital Outputs (only EWPlus 978): 1 Compressor relay (A) : IEC 60730-1 10(6)A max 250Va
UL60730 (A) 1.5Hp (10FLA - 60LRA) max 240Va
1 Defrost relay (B) : NO 8(4)A NC 6(3)A max 250Va
1 Defrost 2 relay (C) : NO 5(2)A max 250Va
1 Aux/Fans relay (D) : NO 5(2)A max 250Va
Mechanical Characteristics
Container: PC+ABS UL94 V-0 resin casing, polycarbonate window, thermoplastic resin keys
Dimensions: front 74x32 mm, depth 59 mm (without terminals)
Terminals: screw/disconnectable terminals for wires with cross-section of 2.5mm
2
Connectors: TTL for connection to Copy Card + D.I.2 (only EWPlus 978)
Humidity: Usage / Storage: 10...90% RH (non-condensing)
Regulations
Electromagnetic compatibility: The device complies with Directive 2004/108/EC
Safety: The device complies with Directive 2006/95/EC
Food Safety: The device complies with standard EN13485 as follows:
- suitable for storage
- application: air
- climate range A
- measurement class 1 in the range from -25°C to 15°C
(exclusively using Eliwell NTC probes)
NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer strictly
to the instrument and not to any accessories provided, such as the probes.
This means, for example, that the error introduced by the probe must be added to the error of the instrument.
ELECTRICAL CONNECTIONS
Important! Make sure the machine is switched off before working on the electrical connections.
The instrument is equipped with screw or disconnectable terminal boards for connection of wires having a maximum cross section
of 2.5 mm
2
(a single conductor per terminal for the power feeding connections): refer to the label on the instrument for details of
the terminal ratings. Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient power capacity.
Make sure that the power supply is of the correct voltage for the device.
Probes have no connection polarity and can be extended using a normal bipolar cable (note that the extension of the probes
influences the instrument's electromagnetic compatibility -EMC: take great care with the wiring).
Probe cables, power supply cables and the TTL serial cables should be routed separately from power cables.
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