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Technical Instructions
Document No. 155-773
September 1, 2015
Manual Override
Wiring
Page 6
The actuator can be driven manually to any position between 0 and 1 with a 3 mm hex
wrench. The control signal from the controller, however, will take priority over any
manual position.
For manual positioning (without power), insert the 3 mm hex wrench in the center of the
position indicator. See Figure 7. The actuator will maintain its position until power is
provided or restored.
•
(A) Turn hex wrench counterclockwise to retract the spindle.
• (B) Turn hex wrench clockwise to extend the spindle.
NOTE:
Do not perform manual override while the power supply is connected; the
actuator will not track accurately when the control signal is applied. A short
power off/power on sequence is recommended to recalibrate the SSD61U
actuator.
•
Do not use autotransformers. Use earth ground isolating step-down Class 2 power
supplies.
•
Determine supply transformer rating by summing total VA of all actuators used.
•
It is recommended that no more than 10 actuators be powered by one transformer.
Figure 8. SSD81U Wiring Diagram.
Figure 7. Manual Override Operation.
Figure 9. SSD61... Wiring Diagram.
Pressure Independent Control
SSD Series Electronic Valve Actuators
WARNING:
Terminal connection "G0" is
Common, not ground.
Siemens Industry, Inc.
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