BETA RC33

Beta Controller RC33

The RC33 models are controllers specifically designed to manage ventilated refrigerating units, for positive or negative temperatures. The controllers have 2 analog inputs for ntc/ptc temperature probes (room and evaporator), optionally a digital-input for an external switch and 3 relay outputs for compressor (16A), fan (5A) and defrost heater (8A). It is designed to perform defrost by electrical heater or hot-gas; the defrost end may be based on fixed time or by the evaporator temperature.

Specifications

  • Specifications
  • Drawing

TECHNICAL SPECIFICATIONS

POWER : 230 Vac ±10% 50/60 Hz (3VA max);
SUPPLY or 115 Vac ±10% 50/60 Hz (3VA max);
or 12 Vac/dc ±10% (150mA max) (use only SELV power s.);
or 9..24 Vac/dc (use only SELV power supply).
INPUTS: 2 Ntc/Ptc sensors, 1 Digital-In external contact (max 1mA);
Probes types: Ntc standard 10Kohm@25°C Beta=3435-25/85;
Ntc 5Kohm@25°C Beta=3980-25/100;
Ptc 990ohm@25°C KTY81(2)-121.
OUTPUTS: 1 spst relay 250Vac 12A max resistive (compressor);
1 spst relay 250Vac 5A max resistive (fan);
1 spdt relay 250Vac 8A max resistive (defrost).
(the max const. current in the common terminal #1 is 12A)
SERIAL PORT: TTL level, ModBus protocol, RTU type, 9600 baud, 8bit char, even parity, 1 bit stop;
DISPLAY: 3 digit LED, 14 mm height, high intensity red;
MEASURING RANGE: -50 … +150 °C / -50 … +302 °F (if Ptc);
– resolution: 0.1 °C / 0.1 °F (within –19.9 .. +99.9);
– accuracy @25°C: ±0.5 °C + 1 digit;
– connections terminal block with screw for max 2.5mm2 gauge wire;
– operating temperature: –10 … +60 °C;
– storage temperature: –25 … +70 °C;
– storage humidity: 30 … 90 % r.H., non condensing;
– plastic casing (PC+ABS rear box, PC frontal panel);
– frontal panel IP65, if appropriate mounting gasket;
– max temperature of the switch head: 60 °C;
– pollution degree: 2;
– rated impulse voltage: 2.5 KV;
– PTI of insulating material: 175 (circuit board 250);
– class of protection against electric shock: II (for correct install.);
– class of protection against voltage sourges: category II;
– type of disconnection: 1.B micro disconnection (relay);
– software class: A.

Beta RC33-16A

Thursday September 17th, 2015
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