The TPT Environmental Hub The Environmental Hub product provides a centralized point for connection of all your cabinet accessories including: • Digital temperature sensor bus (up to 8 external temperature sensors capable) • Humidity Sensor • Three (3) voltage free contact inputs (for detectors, i.e. Smoke, Leak, and Gas etc.) • Door status voltage free contact input • Door solenoid control relay output • RS232 keypad card reader interface with door status indicator output As an integral part of the PDU this means that all elements of the cabinet can be captured and transmitted to a centralized data collection point using a single set of communications cabling rather than running separate systems for Power, Environmental, and Security. This unit also offers a complete audit trail for recording access / work within the cabinet.