Data Sheet for Product

Technical Instructions SSA/P Series Electronic Valve Actuator
Document Number 155-710 24 Vac Floating or 0 to 10 Vdc Control
January 12, 2018
Page 6 Siemens Industry, Inc.
Start-Up
Check the wiring and the position indication. See Figure 8 for referred positions “0” and “1”
on the position indicator disc.
SSA61U and SSA81U Normally Closed
• When the position indicator disc is at the "0" position the output shaft is extended
(two-way valve closed).
• When the position indicator disc rotates to position “1”, the output shaft is retracted
(two-way valve open).
SSP61U Normally Open
• When the position indicator disc is at the "0" position, the output shaft is retracted
(two-way valve open).
• When the position indicator disc rotates to position “1”, the output shaft is extended
(two-way valve closed).
CAUTION:
The SSA61U and the SSP61U calibrate (calibration stroke) during start-up.
Correct functioning cannot be guaranteed if the actuator is operated without a
valve.
Figure 9. SSA61U and SSA81U
Normally Closed.
Figure 10. SSP61U
Normally Open
• (A) Turn the hex wrench
counterclockwise and spindle retracts.
• (B) Turn hex wrench clockwise and
spindle extends.
• (A) Turn the hex wrench clockwise and
spindle extends.
• (B) Turn hex wrench counterclockwise
and spindle retracts.