|
The ATR131 is a digital controller in 32x74 format designed for the control of refrigeration systems. There are two versions, the first single relay for the activation of the compressor (with defrost time), the second in three relays to control compressor, defrost and fan on the evaporator. The temperature control is ON / OFF with hysteresis. The compressor stops and starts again reaches the set point when the temperature exceeds the set point plus the hysteresis value. For the version with 3 relays are two types of defrost: electric (compressor stops) or hot gas (the compressor continues to run). Other programmable features are included: frequency of defrost count type of time, temperature and time defrost end up. The probe on the evaporator and the relay of the fan are used to control the defrost cycle: You can select the temperature above Which the fan turns off, the ignition delay time after defrost and the bond between fan and compressor. Alarms of high and low temperatures can be excluded for a set time after a defrost or switched on. There are also various ways to protect the compressor against short departures (delay switching, minimum switch-off and minimum time between two successive activations). Versions are available with serial communication RS485 - Modbus RTU / Slave. Series configuration faster and safer with additional memory card.
|