Data Sheet for Product

9
Siemens
CE1N3544en
Smart Infrastructure
2021-10-25
Operating mode 3P - open loop control
To use VAV compact controllers as 3-position actuators with air volume flow measurement,
the parameter "operating mode" must be set to "3P". In this operating mode, air volume flow
control by the VAV compact controllers is deactivated and the parameters Vmin, Vmid, and
Vmax have no effect. The damper opening direction is determined by the connection of sig-
nal inputs Y1 and Y2.
Differential pressure sensor with 3-position actuator in operating mode 3P
YC
Open
Y1
Open
G0
Open
Y2
Open
G0
Action
Damper holds position
DIR r → rotates CW
DIR L → rotates CCW
Damper opens
DIR r → rotates CCW
DIR L → rotates CW
Damper closes
DIR r → rotates CCW
DIR L → rotates CW
Damper opens
Operating mode STP - step control
CAV step mode: CLOSE / Vmin / Vmid / Vmax / OPEN
CAV step control in operating mode STP
YC
< 1 V → Vmin
Open → Vmid
> 9 V → Vmax
Y1
Open
G0
Open
Y2
Open
G0
Action
CAV step control
DIR r → rotates CW
DIR L → rotates CCW
Damper opens fully
CAV step control
DIR r → rotates CCW
DIR L → rotates CW
Damper closes fully
Setting Vmin ≤ 0 % drives the actuator to position "fully closed" (see Connection diagrams
[▶ 13]).