Digital controller for refrigerating units
2 probe inputs (or digital input), up to 3 relay outputs, buzzer and defrost.
Available with "Sensitive Touch" keyboard and extractable terminal block.
- Process inputs:
2 inputs for temperature probes:
- PTC KTY81-121 (990 Ω @ 25 °C)
- NTC 103AT-2 (10KΩ @ 25 °C)
Overall accuracy: ± 0.5 % fs + 1 digit
1 Free voltage digital input (alternativelly to the second input)
Keyboard:
- Mechanical
- Sensitive-Touch - Process outputs:
up to 2 relay outputs:
- OUT1 SPDT or SPST-NO
16A-AC1, 6A-AC3 250 VAC, 1 HP 250 VAC, 1/2HP 125 VAC
- OUT2 SPDT
5A-AC1, 3A-AC3 250 VAC, 1/2 HP 250 VAC, 1/3 HP 125 VAC
12 A max for each terminal with extractable terminal block
Internal buzzer for alarm indication - Power supply:
- 12 VAC/VDC ±10%
- 12...24 VAC/VDC ±10%
- 100...240 VAC ±10%
Frequency AC:50/60 Hz
Power consuption: around 4 VA - Control functions
Stand-by mode
Control strategies :
- ON/OFF
Up to 4 different kind of configurable alarms:
- Probe errors
- Temperature tresholds: (absolute or relative)
- External alarm
- Door alarm
Compressor protection
Start-up delay
Defrost
- Defrost start/stop:
Time based (continuos compressor working time)
Temperature threshold ( Evaporator)
Dynamic Defrost (with second probe)
- Defrost methods:
By compressor stop
By electrical heater
By hot gas
By cycle reverse - Communication and configuration:
Communication on TTL port to:
- Universal programming key
- Remote display - Dimensions:
78x35 mm, depth 64 mm + 11.5 mm with extractable terminal block
Connections:
- 2.5 mm² screw terminals block
- 2.5 mm² extractable screw terminals block
IP65 front frame protection, with gasket
1 display with 3 digits, h: 15.5 mm, red or blue colour
File no. E206847
Ref. UL/CSA 60730-1-2-9