Siemens ACVATIX SKB Series Manual page 3

Automatic
operation
mode
Minimal
volumetric
flow
SKB32..
SKB82..
3-position
control signal
SKB62..
SKB60
Y positioning
signal
DC 0...10 V
and/or
0...1000 Ω,
DC 4...20 mA
Frost
protection
monitor
Frost
protection
thermostat
Siemens
Smart Infrastructure
For automatic operation, turn the manual adjuster clockwise to the end stop.
The pressure cylinder moves upwards to the 0% stroke position of the valve.
In the display window, the read scale disappears. Afterwards, swing the
crank closed.
The actuator can be manually adjusted to a stroke position > 0%, allowing
its use in applications requiring a constant minimal volumetric flow.
The actuator is controlled by a 3-position signal either via terminals Y1 or Y2
and generates the desired stroke, which is transferred to the valve stem:
●
Voltage on Y1:
●
Voltage on Y2:
●
No voltage on Y1 and Y2:
The actuator is either controlled via terminal Y or override control Z. The
positioning signals generate the desired stroke by means of the above
described principle of operation, which is transferred to the valve stem:
●
Signal Y increasing:
●
Signal Y decreasing:
●
Signal Y constant:
●
Override control Z:
A frost protection thermostat can be connected to the SKB6.. actuator.
The added signals from the frost protection monitors QAF21.. and QAF61..
require the use of SKB62UA actuators. Notes on special programming of
the electronics are described under Electronics [➙ 5].
Connection diagrams for operation with frost protection thermostat or frost
protection monitor can be found under Connection diagrams [➙ 26].
Piston extends
Piston retracts
Piston and valve stem remain in the
respective position
Piston extends
Piston retracts
Piston and valve stem remain in the
respective position
See Functions [➙ 8]
Valve opens
Valve closes
Valve opens
Valve closes
3
CM1N4564en
2023-10-17