Data Sheet for Product

8
Siemens
CE1N3544en
Smart Infrastructure
2021-10-25
Override control with YC = 0 V for setpoint range 2…10 V
When the setpoint signal range (YC) is set to DC 2…10 V, the actuator can be driven to "fully
closed" by setting YC = 0 V. The hysteresis behavior is shown in the diagram below.
Operating
mode
CON / VAV
YC
2…10 V
A full closure by setting YC = 0 V in 2-10 V operation overrides the inputs Y1 and Y2.
Operating mode CON / VAV – constant air volume control
Constant air volume control (CAV) is achieved of the input YC is open, or by sending a con-
stant setpoint. Vmin and Vmax control can be accomplished with control signals Y1 and Y2.
Override control in operating mode CON / VAV
If the inputs Y1 and Y2 are wired appropriately, the states listed below can be reached:
Operating mode CAV (CON / VAV)
YC
Open
Y1
Open
G0
Open
Y2
Open
G0
Action
Vmin control
DIR r → rotates CW
DIR L → rotates CCW
Damper opens fully
Vmax control
DIR r → rotates CCW
DIR L → rotates CW
Damper closes fully
CAV mode is also possible by preselecting a constant setpoint via input YC. Setting
Vmin ≤ 0 % drives the actuator to position "fully closed".