Power Supply: 230 vac ±10% 50/60 hz (3va max) or 115 vac ±10% 50/60 hz (3va max) or 12 vac/dc ±10% (150ma max) or 9..24 vac/dc (use only low voltage power supply).

Inputs: 1 ntc/ptc sensor, 1 digital input for external contact (maximum 1ma).

• Sensor Types: ntc standard 10kohm@25°c beta=3435-25/85 (-40..+125°c), ntc 5kohm@25°c beta=3980-25/100 (measurement range -40..+80°c), ptc 990ohm@25°c kty81(2)-121 (measurement range -50..+150°c), ptc 1kohm@100°c kty84-130 (measurement range -40..+300°c).
• Outputs: 1 spdt relay 250vac 8a max resistive (k1 – main relay), 1 spst relay 250vac 5a max resistive (optional alarm).

Serial Port: Ttl level, modbus protocol, rtu type, 9600 baud, 8 bit char, even parity, 1 bit stop.

Display: 3 digit led, 14 mm height, high intensity red.

Measurement Range: -50…+300 °c / -50 ... +572 °f (when using ptc/ptc300).

Resolution: 0.1 °c / 0.1 °f (between –19.9 .. +99.9).

Accuracy: @25°c: ±0.5 °c + 1 digit. Accuracy of the connected sensor must be added.

Operating Temperature: –10 … +60 °c.

Storage Temperature: –25 … +70 °c.

Storage Humidity: 30 … 90 % rh, non-condensing.

Plastic Enclosure: pc+abs back, pc front panel, ip65 with sealing gasket.

Electrical Shock Protection Category: ii (for proper installation).

The rc31 is a controller specially designed for managing static cooling systems. It allows selection between direct and reverse operation for controlling heating devices. It features 1 analog input for ntc / ptc sensors and 1 relay output for cooling or heating, while also including an optional digital input with external switch.