The RS485 version of the Novus N322 NTC is a digital temperature controller for heating or cooling purposes with 2 independent setpoints, giving 2 relay outputs with independent parameters for direct control of elements, compressors, fans, and valves — no SSR required for simple installation, backed by a 16A relay with Novus reliability. With RS485 built in, it uses Modbus for remote monitoring and integrates with SCADA or a PLC via a serial network, making it well suited to breweries, HVAC, and agriculture.
Operating range is -50 to +120 degrees Celsius with the supplied NTC sensor. The output control can be refined with adjustable hysteresis and on/off time delays, giving a gentle response with thermostatic control. The N322 will replace or upgrade the majority of manual or programmable thermostats used in industry. With the RS485 version, parameters such as setpoint (SV) and process value (PV) can be read from the device using the Modbus register table.
✅ 3 Year Manufacturer Warranty — backed by our UK-based technical support
Technical Details
SIZE: 75 x 33 x 75 mm. PANEL CUTOUT: 70 x 29 mm (+0.5 -0.0 mm). SUPPLY: 100~240 Vac (±10%)
INPUT: NTC Sensor (included) — also available as Pt100, Thermocouple J/K/T (see below)
OUT1: Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (16 A Resistive). OUT2: Relay 3 A / 250 Vac, SPST
Sensor is chosen at time of purchase: NTC Thermistor 10kΩ @ 25°C, Range -50 to 120°C, Accuracy 0.6°C (NTC probe supplied, operating range -30 to +105°C, 3m cable extendable to 200m) / Pt100, Range -50 to 300°C, α=0.00385, 3 wires, Accuracy 0.7°C / Thermocouple J, Range 0 to 600°C, Accuracy 3°C / Thermocouple K, Range -50 to 1000°C, Accuracy 3°C / Thermocouple T, Range -50 to 400°C, Accuracy 3°C
Frequently Asked Questions
Does this come with a sensor?
Yes — the NTC probe is supplied with the equipment, 3m cable extendable to 200m.
What can I read via Modbus?
Parameters such as setpoint (SV) and process value (PV) can be read from the device — the full Modbus Register Table is linked above.
Is there a version without RS485?
Contact us for availability of an NTC input model without RS485 — otherwise see our PT100 RS485 version as an alternative sensor input.
Industry Applications
- Brewery — accurate fermentation temperature control with remote monitoring.
- SCADA-Integrated HVAC — RS485 Modbus allows centralised monitoring across multiple thermostats.
- Agriculture — reliable temperature control for growing and storage environments.