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Hardware

ONLY-Hotel is built around a DIN rail module named D-ROOMCTRL. One unit per room is necessary. To add temperature control, a DIN rail D-ACCTRL for fan coil units is necessary. D-ROOMCTRL is available with 5, 6, 7, or 8 relays, which define the number of lighting circuits that can be set in each room.

The other modules in the room are usually our standard C-IN (no built-in relay) with special firmware.

For larger rooms with more than 8 lighting circuits there are two alternatives:

• Additional DIN rail actuators (D-4OUT or D-8OUT ) in the room’s power switchboard
• Distributed C-1OUT or C-2OUT units replacing C-IN units

For rooms with dimmers, there are phase-cut and 1-10V models available. And, to control window roller blinds, a C- 1SHU must be installed.

All Hotel room modules have special firmware to simplify and speed up the programming process (association of buttons to outputs) during installation.

Technical information for BMS integration

• Key card inserted or not
• Room temperature
• Temperature setpoint selected by customer
• Status of air conditioning: off, on, and selected speed
• Duty cycle of each valve (heat and cool) for the last 10 minutes
• Status of window contact
• Status of door contact
• Customer presence in the room
• Failure of temperature sensor
• Visualization in BMS of actuator status

Bus Structure

The D-ROOMCTRL has two bus entries. One is labelled Q and is used to interconnect all the modules installed in the room, forming the local room bus. The other, labelled B, is used to interconnect all D-ROOMCTRL units on the same floor, forming the floor bus.

The interconnection of the floor buses to a common backbone and BMS server can differ from one hotel to another and will depend on the integrator. Several solutions are possible, but we adopt three in particular:

Solution one: Each floor has a third-party controller, which is connected to the LAN, and provides a serial port connected to the FTC232 on that floor.

Solution two: Each floor has a D-FDRV. The different D-FDRV units are interconnected via the isolated bus entry, forming an ONLY bus backbone. In the BMS server room, a D-FTC2E Ethernet converter connects the LAN and the ONLY backbone bus.

The D-FTC2E has special firmware and the integrator must develop specific SW to communicate with the ONLY protocol.

Solution three: Each floor has a D-FTC2E. The BMS server accesses each floor bus directly.

Again, the integrator has to develop specific SW to communicate with the ONLY protocol.