Z31E

Digital controller for refrigerating units with energy saving

2 probe inputs (or digital input), up to 2 relay outputs,  buzzer, defrost and energy saving functions.
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
• Power supply:
  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 configurable alarms:
  - Probe error “E1”, “-E1”
  - Temperature tresholds: “Hi”, “Lo”
  Compressor protection
  Start-up delay
  Defrost
  - Defrost start/stop:
  Time based (continuos compressor working time)
  Temperature driven
  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