Identification
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
Wiring must be sufficiently insulated to the available rated voltage. Sizing and fusing of the wiring depends on the connected load.
The looped supply (230 V) is interrupted when plug 51-54 is disconnected from the device. Bridges 51-53 and 52-54 are located on the PCB, not the plug.
Potential-free relay outputs AC 230 V
Potential-free relay outputs allow for switching loads up to AC 250 V, 4 A (3 A). The circuits have no internal fuse. They must have an external fuse (≤ 10 A).
Sizing Triacs on preloaded applications
The entire load (Triacs) for actuators cannot exceed 4 VA (6 VA briefly for heating up thermal actuators).
On preloaded applications, PWM, priorities, alternating locking, and division of sequences ensures that no more than one Triac is active at any time.
For details, see Installation guide Desigo Room Automation CM111043.
In other words, only the highest connected load on one of the Triacs is relevant to calculating power.
An exception is the use of Triacs as digital outputs. Triacs as digital outputs are not subject to locking or prioritization and must be added to the power consideration.
They must be operated with internal power to protect Triac outputs against overloading.
The maximum overall load is calculated as follows: | ||
|
| Highest load at one of the Triacs used by the application |
| + | Load at digital outputs |
Examples
| Example 1: DXR2x10.., 09T | Example 2: DXR2.x10.., 09T | |||||
|---|---|---|---|---|---|---|---|
Use | Type | Signal | Load | Use | Type | Signal | Load |
Fan coil heating | STP73 | PWM | 2.5 W / (6 VA) | Radiator | STP73 | PWM 5...50% | 2.5 W / (6 VA) |
Chilled ceiling cooling | STP73 | PWM | 2.5 W / (6 VA) | Radiator | STP73 | PWM 5...50% | 2.5 W / (6 VA) |
Outside air damper | GEB131.1E | 3-position | 4 VA | Chilled ceiling | STP73 | PWM 5...50% | 2.5 W / (6 VA) |
Digital output | - | - | - | Chilled ceiling | STP73 | PWM 5...50% | 2.5 W / (6 VA) |
Overall load | 4 VA / (6 VA) | 2.5 W / (6 VA) | |||||
Sizing DC 0…10 V outputs and field supply
Total load (V~) cannot exceed 4 VA (6 VA briefly for actuator synchronization at start up or boost heating of thermal actuators).
The DC 0…10 V outputs supply max. 1 mA.
| Example 1: DXR2x09 | Example 2: DXR2.x09 | |||||
|---|---|---|---|---|---|---|---|
Use | Type | Signal | Load | Use | Type | Signal | Load |
Fan coil heating | SSB61 | DC 0...10 V | 2.5 VA | Radiator | STP63 | DC 0...10 V | 2.5 W / (6 VA) |
Chilled ceiling cooling | - | - | - | Radiator | - | - | - |
Outside air damper | GLB161.1E | DC 0...10 V | 3 VA | Chilled ceiling | STP63 | DC 0...10 V | 2.5 W / (6 VA) |
Digital output | Relay | BO | 0.5 VA | Chilled ceiling | - | - | - |
Overall load | 3.5 VA | 2.5 W / (6 VA) | |||||
| Example 3: DXR2x09 | ||
|---|---|---|---|
Use | Type | Signal | Load |
Chilled/heated ceiling | - | - | - |
6-port control ball valve | GDB116.9E | 0…10 V | 3 VA |
Condensation monitor | QXA2100 | DI | 1 VA |
Overall load |
|
| 4 VA |
A separate AC 24 V field supply is required if field devices and Triac outputs use more than 4 VA or have peak loads in excess of 6 VA.
Do not use the external field supply for the triacs. The external field supply is reserved for field devices only, which in turn, must be controlled by an analog output (Y10...Y30).
Connecting an external supply to the triacs (V~) will destroy the room automation station.
Digital inputs
Digital inputs are not suitable for operating lighting or blinds. Use the KNK PL-Link pushbutton.