The major components of the PLC based Tunnel Ventilation Control Panel includes: Enclosure, PLC I/O Base with power supply, CPU, and I/O modules, power filter, Human Machine Interface (HMI) touch screen, control relays, 24-Volt DC power supply, pressure transducers, selector switch, convenience outlet, solenoid valves, circuit breakers, terminal blocks, wiring, wire duct
, placards, and all other necessary appurtenances.
Many panel builders find it difficult to terminate wire into components mounted on standard DIN-rail when the wire duct
is close, or when large panel mount products sit high on the panel; the raised rail with centered mounting slots and larger 1-in.
It employs nearly 500 people in the West Midlands through Coleshill-based Adaptaflex, which makes electrical wire ducts
, and Dudley-based Air Movement.