Siemens ACVATIX SKB Series Manual page 6

SKB62/MO
The Modbus converter is designed for analog control at 0...10 V.
Keep the analog signal setting on the actuator as is (switch 1 to OFF); adjustment not
permitted.
The actuators are factory configured for equal-percentage characteristic.
DIL switch (internal actuator characteristic changeover) to "log" (switch 2 to OFF).
Functions
Spring-return function
The SKB32.51, SKB82.51.. and SKB62.. actuators, which feature a spring-return function,
incorporate a solenoid valve which opens if the control signal or power fails. The return
spring causes the actuator to move to the 0% stroke position and closes the valve.
Calibration
SKB60, SKB62.., SKB62/MO
In order to determine the stroke positions 0% and 100% in the valve, calibration is required
on initial commissioning.
Mechanical coupling of the actuator SKB6.. with a Siemens valve.
to capture the effective 0% and 100% values.
AC 24 V power supply applied.
Housing cover removed.
1. Short-circuit contacts in calibration slot (e.g. with a
screwdriver) and trigger calibration process.
2. Actuator moves to 0% stroke position [1].
3. Actuator moves to 100% stroke position [2].
Measured values are stored.
Normal operation:
Actuator moves to the position [3] as indicated by signals
Y or Z.
LED is lit green permanently, positioning feedback U
active, values correspond to the actual positions.
A red lit LED on the actuator indicates a calibration error.
6
Siemens
Smart Infrastructure
Actuator must bin in „Automatic operation mode" enabling stroke calibration
Valve closes.
Valve opens.
LED flashes grün, positioning
feedback U inactive
CM1N4564en
2023-10-17