Salus CB500X 5 Zone Extension Box

Salus CB500X 5 Zone Extension Box

The Salus CB500X is a hard-wired extension module designed to expand underfloor heating and cooling control systems by up to five additional zones when used alongside the Salus CB500 Wiring Centre. This modular extension supports both heating and cooling operations, allowing for scalable management of large domestic or commercial installations. Up to two CB500X units can be added to a single CB500, enabling comprehensive control across a maximum of 15 independent zones.

Technical Information

• Product Type: 5 Zone Extension Module for underfloor heating/cooling
• Power Supply: 230V AC, 50Hz (powered by CB500 when used as an extension; standalone 230V when used independently)
• Number of Zones: 5 per module (up to 2 extensions per CB500)
• Actuator Compatibility: Normally Closed (NC, default) and Normally Open (NO)
• Actuators per Zone: Up to 4 per zone (max 20 actuators per CB500X)
• Thermostats per Module: 5, with direct 230V supply to each
• Cooling Function: Supports automatic cooling as well as heating
• Mounting: Surface or 35mm DIN rail
• Wiring Connections: Spring-clamp terminals for quick install
• Fuse: 5 x 20mm T2A ceramic (slow-blow)
• Dimensions: 270 mm (W) x 110 mm (H) x 55 mm (D)
• Compliance: UK/EU EMC, LVD, and RoHS Directives
• Ingress Protection: Indoor use only
• Warranty: 5 years

Suitable For

• Expanding Salus CB500-based underfloor heating or cooling setups
• Multi-zone temperature control in large residential or light commercial buildings
• Installations needing modular, secure wiring and robust zone management
• Applications requiring both heating and cooling automatic management

Key Features

• Scalable system—expands a CB500 controller from 5 to 15 zones (with two extensions)
• Independent supply to actuators and thermostats (230V)
• Supports NC and NO actuators
• Cooling mode input and night setback function
• DIN rail or wall mounting for flexible installation
• Quick, secure spring-clamp wiring terminals

Important Installation Notes

• Do not connect 230V mains directly to CB500X when operating as an extension—the main CB500 unit provides all power in this configuration.
• Power input should only be used for standalone operation.
• Only replace fuses with the device isolated from mains power.

Package Contents

• Salus CB500X 5 Zone Extension Box
• Mounting screws and accessories
• Installation and wiring manual