N323-RHT-485-24V Temperature & RH Controller w/ RS-485, 24 V

N323-RHT-485-24V Temperature & RH Controller w/ RS-485, 24 V

SKU: CET-112

Panel mount temperature & relative humidity controller with sensor probe on 3 meters of cable. 3 independent relay outputs. RS-485 Modbus communications. 12 to 30 VAC or DC powered.

  • Manufacturer: Novus
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The N323RHT is a digital controller for relative humidity and temperature. Its 3 relay outputs can be configured independently as control or alarm, either for temperature or relative humidity. A relative humidity and temperature or RHT probe (3 m cable length) is provided along with the instrument. The temperature, humidity and status of relays are shown on the LED Display.

Each relay output has configurable set point, hysteresis and action. Relays can trigger above or below set points, within or outside temperature ranges. On and off times are configurable. Relay outputs can drive fans, compressors, pumps, heaters, humidifiers etc. to control the temperature and humidity.

The controller has an RS-485 port and communicates via Modbus RTU, allowing integration into building management or logging systems. Applications include fruit storage, data centers and air conditioning.


  • Triple independent relay output
  • Bright, 3.5 digit LED display
  • Adjustable hysteresis and configurable set point minimum and maximum limits
  • Configurable password protection
  • Heating, cooling, humidifying or drying modes, in band and out of band alarm modes
  • Initial blocking modes prevent alarms from activating until normal operation has commenced
  • Configurable delayed start allows reduction of inrush current when using multiple controllers powered up at once
  • Temporary activation mode to activate an output for a maximum fixed time.
  • Sequential activation mode toggles an output on and off for mixers or agitators
    • SKU
    • Weight
      0.27 kg
    • Dimensions (L x W x H)
      13.5 x 10.5 x 6.5 cm

Power supply: 12 to 30 VAC/DC 

Power consumption: 5 VA

Temperature resolution: 0.1º (–19.9º and 119.9º) 

Sensor Probe: 

  • Humidity measurement accuracy: ±3% from 20% to 80% 
  • Humidity stability: ≤1 %RH / year 
  • Humidity measurement range: 0 to 100 % RH 
  • Humidity linearity error: ≤1 % RH 
  • Long term humidity stability: ≤1 % RH 
  • Humidity response time: 4 seconds (10 to 90 %) 
  • Temperature measurement accuracy: ±0.5 to ±2 °C depending on temperature
  • Temperature repeatability: ±0.1 °C 
  • Temperature measurement range: -20 to 100 °C 
  • Cable length: 3 meters 

Controller warm-up: 15 minutes 

Output1 Relay: SPDT, 16A / 250 VAC (1 HP) 

Output2 Relay: SPST, 3A / 250 VAC 

Output 3 relay: SPST, 5A / 250 VAC 

Serial port: RS-485 

Communication: Modbus RTU protocol

Ingress protection (Front): IP65

Ingress protection (Rear): IP42

Suitable wiring: Up to 4.0 mm²

Operating temperature: 0 to 40 °C 

Storage temperature: -20 to 60 °C

Case: Polycarbonate UL94 V-2 

Panel cutout: 70 × 29 mm 

Weight: 100 g

Dimension: 74 x 32 x 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

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

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