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Ideal for open/closed display cases and bottle coolers, the PSK221 offers a digital controller solution for medium temperature refrigeration units. The PSK221 provides increased functionality with the addition of a multifunction input – which can be configured for a door switch, an evaporator temperature sensor (for temperature terminated defrost), a condenser temperature sensor (for condenser overheat alarm and compressor lock-out) or to trigger energy saving mode. Other features include temperature alarms and easy setup with the optional programming key.

  • The PSK221 controller manages medium temperature refrigeration units by controlling a compressor and sensing temperature
  • Single digital output (relay): 16A compressor, 1/2HP @ 120VAC, 1-1/2HP @ 230VAC
  • Alarm buzzer and TTL serial port (RS485 Modbus)
  • 1 NTC/PTC temperature sensor input
  • 1 multipurpose input (configure as switch or temperature sensor)
  • IP65 front panel protection
  • 3-1/2 digit display shows decimal point values (in Celsius mode) at -10.0 and below
  • Easy to understand multicolor display icons
  • Extractable screw terminal connections for easy installation
  • Front bezel size: 2.95” x 1.3” (75 x 33 mm)
  • Panel cut out: 2.79” x 1.14” (71 x 29 mm)
  • Power supply: (N5) 120VAC 50/60 Hz, (N7) 230VAC 50/60 Hz
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Product Type:

Temperature Control



Temperature Control




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