N323-PT100-485 Thermostat Controller with PT100 Sensor input, Modbus RS-485, 24 VDC or AC

In stock (2 items available)
  • Weight
    0.28 kg
  • SKU

Panel mount thermostat with PT100 sensor input and Modbus RTU comms. Configurable for a huge range of heating and cooling applications. 12 to 30 VDC or VAC powered.

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  • $96.43

The Novus N323 Thermostat is a budget priced On-Off temperature controller with industrial level reliability. This model accepts a PT100 RTD sensor and has an RS-485 Modbus communication interface and is powered from 24 VAC or 24VDC.

The N323 thermostats have three relay outputs which can be configured for heating or cooling or a number of different alarm modes and are easily configured by the front panel buttons and display.

The temperature and status of relays are shown on the LED Display. Great for aquariums, home brewing, ovens, fridges, greenhouses and many other applications.

RS-485 Modbus communications allows the temperature, output status and all configuration variables to be accessed from a PLC, computer or building management system.


  • IP65 when mounted in panel
  • Fully configurable
  • Heating or cooling actions
  • Configurable hysteresis
  • Configurable start-up delay to reduce inrush current when using multiple controllers
  • Configurable minimum on and off times to extend compressor or heater life
  • Over /under temperature and in-bound / out-of-band alarms
  • Optional multi-level password protection
  • RS-485 Modbus RTU communication interface


Power supply: 24 VAC/DC

Power consumption: 5 VA

Sampling time: 1.5 samples per second

Display: 3 digit LED

Sensor input: PT100 (not included)

Temperature range: -50 to 300 °C

Temperature accuracy: ±0.7 °C

Output 1: SPDT, 1 HP (16 A resistive), 250 VAC

  • Heating
  • Cooling

Output 2 and 3: SPST, 3 A resistive, 250 VAC

  • Heating
  • Cooling
  • Low Alarm
  • High Alarm
  • Inside Range Alarm
  • Outside Range Alarm
  • Low Alarm with Initial Blocking
  • High Alarm with Initial Blocking
  • Inside Range Alarm with Initial Blocking
  • Outside Range Alarm with Initial Blocking

Panel cutout: 70 × 29 mm

Dimensions: 75 × 33 × 75 mm

Faulty Goods and Warranty

Where such goods have been supplied we undertake to repair or replace them as quickly as possible.Prior to returning faulty items, please contact us with a description of the fault as one of our engineers might be able to assist you by resolving the issue over the phone.
A Warranty form must be filled out and returned with any goods.

Our standard warranty period is 12 months from the date of purchase unless stated otherwise.

Other warranty periods:

Labjack Products: 5 Years
Atop Products: 3 Years
MeanWell Products: 3 Years
Terracom Products: 3 Years

Warranty is subject to us being satisfied that a defect was caused by defective workmanship or materials and was not caused by or was not substantially contributed to by other factors beyond our control including incorrect installation, alterations or modifications of the product not recommended by the manufacturer.

Returns Policy

If you are dissatisfied with our goods you may return them within 14 days of the dispatch date. Contact us for an authorisation and we will refund your purchase less shipping costs and restocking fees. All returned goods MUST be in AS NEW condition including ALL PACKAGING and DOCUMENTATION / MANUALS etc.

Please note:

  • The product returned will attract a 20% restocking fee.
  • The customer must pay the delivery costs.
  • Non standard, custom made or a specially manufactured or imported products are not returnable.
  • Semiconductors, books and software are not refundable

Full Terms and Conditions

By placing an order with Ocean Controls, you agree to be bound by our Terms and Conditions of Trade.

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