Models XLR130 and XLR170, 210x230mm format, are microprocessor based controllers suitable for applications on medium or low temperature refrigerating units. They are provided with four (XLR130) or six (XLR170) relay outputs to control compressor, defrost – which can be either electrical or hot gas (XLR170) – the evaporator fans (XLR170), the lights, the alarm and an auxiliary output. They are also provided with three NTC or PTC probe inputs, one for temperature control, one to control the defrost end temperature of the evaporator and the third, optional, for the display. There are two digital inputs (free contact) for the door switch and configurable by parameter.
The standard TTL output allows the user to connect, by means of a TTL/RS485 external module, a ModBUS-RTU compatible monitoring system and to programme the parameter list with the “Hot Key”.
Each model in the XLR100 can be provided with a Real Time Clock which allows programming of up to eight daily defrost cycles, divided into holidays and workdays. A “Day and Night” function with two different set points is fitted for energy saving.
Specifications
“OFF CYCLE” DEFROST DIGITAL CONTROLLER FOR NT
230x210mm
Power supply: 24, 110, 230Vac
Display: n° digits: ± 3 d.p.
Keyboard: push buttons: 8
Thermostat: NTC/PTC
Display: NTC/PTC
Digital inputs
Alarm, block alarm, pressure switch, start defrost, energy saving, ON/OFF, AUX, holiday: configurable
Door switch: present
Relay outputs
Compressor: 20A
Light: 16A
AUX: 20A
Alarm: 8A
Hot Key/Prog Tool Kit output: present
Serial output: RS485 optional
Buzzer: present
Real time clock: optional
Features
- Advanced multifunction refrigeration controllers suitable for both heating and cooling
- Temperature control can be performed on probe 1, probe 2 or by the difference between probe 1 and 2
- Complete compressor and defrost management
- Maximum and minimum temperature recording
- Direct line power supply 230 (110)Vac. – no external transformer required
- Instant visibility of machine status via display icons, clear alarm signals thanks to the front lid
- Fast and easy wiring
- Designed to be wall or panel mounted
- Standard communication protocol ModBUS-RTU
- Hot key or Prog tool kit connector for a quick and easy programming
- 10VA max power absorption
- Display with red LED (30,5mm high) and 11 icons
