



- Stock: In Stock
- Model: RELEIB5-8
Infraboost IB5 Relay Module – NO Dry Contact (Potential-Free)
Do you need to connect your Infraboost IB5-5 or IB5-8 thermostat to a heating system that requires a potential-free NO (Normally Open) dry contact? The IB5 relay module is the essential interface for safe and correct operation.
It converts the thermostat’s output – which carries a 230 V signal – into a fully isolated, potential-free dry contact, suitable for boilers, burners, and any control input that must not be exposed to mains voltage.
Why use the Infraboost IB5 relay module?
- NO dry contact – the contact simply closes when heating is required, without any voltage present.
- Safe integration – protects your heating device from accidental exposure to 230 V AC.
- Perfect for replacing old 2-wire thermostats – enables the use of IB5-5 or IB5-8 with traditional boiler inputs.
- Wide application – works with gas boilers, burners, controllers, and any system that requires a dry contact.
- Clean compatibility – allows the modern IB5 thermostat to control existing heating systems safely.
How does the NO dry contact work?
The IB5-5 and IB5-8 thermostats switch 230 V AC at their output. Many heating appliances, however, require only a simple, voltage-free closure on their control input.
The IB5 relay module acts as a safe intermediary:
- connect the thermostat’s 230 V output to the relay module input,
- connect the boiler’s 2-wire control input to the relay module output,
- when heating is required, the NO dry contact closes – with zero voltage on that circuit.
Your thermostat remains in full control, while the heating device receives only a safe, potential-free NO signal.
Technical Specifications
- Type: relay module for dry contact output (NO – Normally Open)
- Output: potential-free NO contact
- Intended use: connecting IB5 thermostats to devices requiring a dry contact
- Compatibility: Infraboost IB5-5 and IB5-8
- Typical applications: gas boilers, pellet boilers, burners, controller inputs
- Input signal: switched 230 V output from IB5 thermostat
Warning: The IB5 relay module provides a voltage-free NO dry contact. Installation must be performed by a qualified electrician in accordance with local regulations and boiler requirements.
Safe and Simple Connection for Your IB5 Thermostat
If your heating system requires a potential-free dry contact, the Infraboost IB5 relay module is the mandatory and safest way to connect your thermostat to the boiler.
Add the IB5 relay module to your cart today and ensure a reliable, compliant, and long-lasting installation.






