e-Bus Display is a bus coupling unit to connect any touch display of the e-Touch Display family to an RS-485 communication bus. The equipment includes the Modbus RTU protocol to communicate with other bus devices and it is a slave component in a Modbus network such that any master device can monitor its status and act on it through the Modbus register map, using messages through a network address on the equipment.

The product can be configured with the mobile application EConfigurator using a wireless NFC interface included in the e-Touch Display or using configuration registers via the Modbus protocol.

e-Bus Display detects the e-Touch Display model that has been connected to the equipment and provides the functions corresponding to each model, either to view environmental parameters or to control a fan coil unit. The display can be set up to work in one of the following two modes:

1. Display to view environmental parameters: Allows the user to view the temperature, humidity, pressure, CO2 and VOC on a rotational basis, with the option of using a touch screen with or without keypad. This operating mode also allows all icons on the equipment’s screen to be controlled remotely through the bus.
2. Display to manage a remote fan coil unit controller: Allows control of the status of a fan coil unit controller, a controller with combined fan coil unit and radiant floor control or an VRV indoor unit.

The device includes configuration parameters to limit the minimum and maximum temperature setpoint, either in Cooling mode and in Heating mode, that the user can set through the pushbuttons. But it also includes the possibility to limit internally with some other parameters, the real setpoints that will be applied to the climate control system, thus filtering the temperature set by the user with some other more restrictive ones.

The following table shows the operating of the setpoint temperature limitation from the user perspective with values introduced throught the pushbuttons, to the real values provided by the device to the climate control system: