Each device has a unique serial number to ensure efficient commissioning. It is provided on the adhesive barcode label. The serial number can be read directly into the engineering tool using a barcode reader.
Wiring must be sufficiently insulated to the available rated voltage. Sizing and fusing of the wiring depends on the connected load.
Triac outputs AC 24 V
Individual Triac outputs may have a max. load of 6 VA (heating up the device). The following possibilities are permitted:
- Multiple motorized actuators with a total of max. 6 VA.
- 1 thermal actuator with 6 VA start load in a cold state, controlled using the algorithm PWM 0...100%.
- 2 thermal actuators with 6 VA start load each in a cold state, controlled using the algorithm PWM 5...50%.
For transformer design (voltage drop off), each thermal actuator must be counted at the full start load, since the Triac outputs can be freely controlled.
The heating sequence and cooling sequence are not normally active at the same time (Exception: Downdraft compensation).
The sum total of the base load, bus power, field supply, and Triacs may not exceed 72 VA (DXR2.E..) or 70 VA (DXR2.M..). Power consumption is 96 VA with pulse width modulation.
See Section Power data.
For the DXR2.. 24 V variant, the high side switch Triacs (closed the contact at AC 24 V) are used. As a result, the VAV compact controllers GDB181.1E/3 or GLB181.1E/3 can only be set to operating mode "con" via 0...10 V.
DC 0…10 V outputs
The DC 0…10 V outputs supply max. 1 mA.
AC 24 V supply for field devices (V~)
Actuators (valves, dampers) and active sensors are supplied directly by the device. Separate AC 24 V power supply is only required if field devices consume more than 12 VA (on DXR2.x11.. and DXR2.x12..) or 18 VA (on DXR2.x18).
DC 24 V power supply for field devices (V+), DXR2.x18 only
Actuators (valves, dampers) and active sensors are supplied directly by the device. A separate DC 24 V field supply is only required if field devices use more than 2.4 Watts.
Digital inputs are not suitable for operating lighting or blinds. Use the KNK PL-Link pushbutton.