COMET H3430 Temperatur- und Feuchteregler RS485

COMET H3430 Temperature & Humidity Controller RS485

The COMET H3430 is a reliable, high‑precision temperature and humidity controller designed for professional use in industry, commercial buildings, and HVAC applications. With two potential‑free relay outputs (2 A / 50 V each), it automatically controls heaters, coolers, humidifiers, dehumidifiers, or ventilation systems, ensuring an optimal room climate without constant manual intervention. At the same time, the device continuously monitors temperature and relative humidity and, when limits are exceeded, not only switches the relays but also triggers a loud acoustic alarm, providing additional safety and system protection.

Thanks to the integrated RS485 interface with Modbus RTU protocol (factory‑set), the H3430 can be seamlessly integrated into building automation, SCADA systems, or PLCs. Alternative protocols ARION and Advantech ADAM are also available. Three potential‑free binary inputs allow connection of door/window contacts, external switches, or additional sensors, making it ideal for complex control and safety logic.

A key feature: the H3430 automatically calculates all important derived humidity parameters such as dew point, absolute humidity, specific humidity, mixing ratio, and specific enthalpy, and can use these values as control or alarm variables. This lets you control not only by relative humidity, but also directly by dew point, which is ideal for preventing condensation in cold rooms or during drying processes.

The robust housing with IP65 protection for the electronics (IP40 for the sensors) and an operating temperature range from –30 to +80 °C make the H3430 a perfect controller for warehouses, production areas, greenhouses, server rooms, museums, or food storage facilities. Installation takes only a few minutes – wall‑mount the unit, connect the wiring, and it is ready for operation.

Your benefits with the COMET H3430 at a glance:

• 2 powerful relay outputs (2 A / 50 V / 60 VA) – direct control of actuators
• Control by temperature, humidity OR dew point – extremely flexible
• Acoustic alarm (buzzer) – immediate local warning
• 3 binary inputs for external signals (door open, emergency stop, etc.)
• RS485 with Modbus RTU – ideal for building automation and industry
• High accuracy: temperature ±0.4 °C, humidity ±2.5 %RH
• Dew point accuracy ±1.5 °C – ideal for condensation protection
• Robust & long‑lasting: IP65 housing, 3‑year warranty
• Easy configuration via free TSensor software or directly on the device
• Wide supply voltage range 9–30 V DC – flexible installation

Technical data in detail:

• Temperature measuring range: –30 to +80 °C (±0.4 °C)
• Relative humidity range: 0 to 100 %RH (±2.5 %RH from 5–95 % at 23 °C)
• Dew point: –60 to +80 °C (±1.5 °C at T <25 °C and RH >30 %)
• Relays: 2 × potential‑free, max. 50 V / 2 A / 60 VA
• Binary inputs: 3 × dry contact or open‑collector (not galvanically isolated)
• Communication: RS485, Modbus RTU, ARION, Advantech ADAM
• Power supply: 9–30 V DC, consumption < 1 W
• Protection rating: IP65 (electronics), IP40 (sensors)
• Dimensions: 136 × 159 × 45 mm, external probe 88 × Ø18 mm
• Weight: approx. 500 g
• Warranty: 3 years

Typical applications:

• Storage and cold rooms (condensation protection)
• Production areas and paint shops
• Greenhouses and agriculture
• Museums, archives, and libraries
• Data centers and server rooms
• Pharmaceutical production and clean rooms
• Ventilation and air‑conditioning systems
• Food production and storage

Installation & commissioning – quick and simple

The H3430 is mounted on the wall with just a few steps. The terminal blocks are clearly labeled, and the relays and binary inputs are easy to access. Full configuration (setpoints, hysteresis, alarm delay, dew‑point control, etc.) can be completed within minutes using the free TSensor software or directly via the keys and display on the device.

Summary:

• Hygrostat with two relay outputs
• Suitable for indoor and outdoor use
• Integrated sensors for relative humidity and temperature
• Measured values are converted into additional humidity parameters: dew point temperature, absolute humidity, specific humidity, mixing ratio, specific enthalpy
• Three binary (two‑state) inputs

Scope of delivery:

• H3430 controller
• User manual
• Traceable calibration certificate
• Free TSensor software for configuring the transmitter