PLCs, wall series

The Domat WALL PLC series solves cabinet space, network topology, and multi-vendor integration challenges that slow down BMS and HVAC commissioning—delivering modular Linux-based controllers with twin-port Ethernet, open protocols, and direct I/O expansion that accelerate project handover across EU office, retail, and industrial sites. Instead of bulky rack systems or closed proprietary controllers, these wall-mounted units provide right-sized processing power with BACnet/IP, Modbus TCP/RTU, and serial connectivity in compact housings that mount directly in electrical panels or equipment rooms.

How they streamline integration: Every WALL PLC runs Domat Runtime with open protocol stacks, eliminating vendor lock-in while supporting both backbone (BACnet/IP, Modbus TCP) and fieldbus (Modbus RTU, IEC 62056-21) communication. Twin-port Ethernet on most models acts as an integrated switch, enabling daisy-chain or line topologies without separate network hardware—critical for distributed HVAC plants or energy monitoring points. Direct expansion with standard 750/753 I/O cards means you can scale from basic gateway functions to full plant control using familiar, modular components.

The series spans from basic protocol converters (w750-8101/8102) through compact fixed-I/O units (wCIO/wCIOcom with 8AI/8AO/8DI/8DO) to advanced modular platforms (wMX/wMXcom) with configurable serial ports. All support web HMI development and deployment via free software tools as Domat IDE, Domat Visual and Domat Web, providing local visualization and remote troubleshooting capabilities for service teams. Serial variants (8102, wCIOcom, wMXcom) include RS232/RS485 ports for VFD, chiller, and meter integration, while the w751-9301 offers balanced on-board I/O (2×AI temp, 2×AI voltage, 2×AO, 8×DI, 4×DO) for essential points.

Key technical features: 24V DC supply, project-based programming in Domat IDE, galvanic isolation on communication ports, and proven reliability across EU deployments. Limitations: web HMI intended for LAN/VPN exposure only (not direct internet); observe serial bus grounding per datasheets; project-specific configuration required.

Book a 20-min session to map your cabinet layout, I/O requirements, and network topology with the optimal WALL PLC selection.