Converters

Domat Data Converters eliminate protocol integration barriers that delay BMS commissioning and create vendor lock-in risks — providing DIN-rail bridge solutions that connect legacy HVAC, lighting, and utility systems to modern open networks across offices, industrial sites, and energy facilities throughout the EU. Instead of expensive proprietary gateways or forced equipment replacement, these galvanically isolated converters enable phased upgrades, mixed-vendor compatibility, and centralized monitoring while preserving existing field investments.

How they streamline mixed-stack projects: Every converter translates between specific legacy protocols (Sauter EY2400, Belimo MP-Bus, P-bus, DALI, M-Bus, DMX512) and standard BMS interfaces (Modbus RTU/TCP, RS232/RS485, Ethernet/IP). This approach allows integrators to integrate specialized subsystems — lighting control, actuator networks, meter reading, legacy building controls — without replacing functioning equipment or learning proprietary configuration tools. Galvanic separation on most models ensures electrical safety and noise immunity, while compact DIN-rail housings fit existing panels without rewiring.

Serial and bus converters include R005 for Sauter EY2400 legacy integration (up to 20 subcontrollers), R012 for basic RS232↔RS485 bridging, and R080 USB↔RS485 for portable commissioning tools. Network converters R025/R035 provide Ethernet↔RS232/RS485 with Modbus RTU/TCP routing, enabling IP backbone access to distributed serial devices while maintaining protocol transparency.

Specialized protocol bridges handle HVAC actuators (R060 Belimo MP-Bus up to 8 devices), lighting systems (R065 DMX with 2×512 channels, R091 DALI multimaster up to 64 devices), utility meters (R095/R096 M-Bus for 25/60 devices respectively), and legacy automation (R085/R086 P-bus for 32/64 BE points). Each converter includes protocol-specific register mapping and configuration support through Domat documentation.

Technical features: 24V AC/DC or 230V AC power options, compact widths from 35mm to 105mm, operating temperature ranges for technical rooms, and clear English datasheets with wiring diagrams. Most models provide galvanic isolation between protocols and include proper termination guidance.

Constraints: Respect protocol-specific rules (DMX terminations, M-Bus unit loads, MP-Bus spur lengths); secure Ethernet converters via VLAN/VPN; plan proper grounding and cable length limits; follow device count maximums per converter.

Book a 20-min session to map your protocol integration challenges and select optimal converter combinations for seamless mixed-stack commissioning.