Z31Y Digital controller for refrigerating units

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  • 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)

Process outputs:
up to 2 relay outputs:
  16A-AC1, 6A-AC3 250 VAC, 1 HP 250 VAC, 1/2HP 125 VAC
  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 :
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 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 

78x35 mm, depth 64 mm + 11.5 mm with extractable terminal block
- 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

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“Industrial Technical Services is a single source Instrumentation and Automation company. We provide certified calibrations, PLC programming, custom controls and Panels”.


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