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DDC CONTROL
8: 0 V (GND)
7: Temperature signal for supply air 0–10 VDC
6: Fan speed signal 0–10 VDC
5: Temperature reference for supply air 0–10 VDC
4: Fan speed reference 0–10 VDC
3: Group alarm – signal from the ventilation unit (earthed contact)
2: Emergency stop (if contact between terminals 1-2 is broken,
the ventilation unit will stop).
1: 0 V (GND)
FAN SPEEDS WITH THE AC VENTILATION UNIT:
Fan speed 1 = 1.0–2.9 VDC
Fan speed 2 = 3.0-4.9 VDC
Fan speed 3 = 5.0-6.9 VDC
Fan speed 4 = 7.0-8.9 VDC
Fan speed 5 = 9.0-10.0 VDC
OTHER CONSIDERATIONS TO OBSERVE:
- The DDC control means must be put into operation separately from the control
panel service menu.
- The functions of terminals 2-4 can be enabled/disabled from the control panel
service menu.
- the status outputs (terminals 6 and 7) can always be used.