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SSA/P Series Electronic Valve Actuator Technical Instructions

24 Vac Floating or 0 to 10 Vdc Control Document Number 155-710

September 16, 2009

Siemens Industry, Inc. Page 5

Manual Override

The actuators can be driven manually to any position between "0" and "1" with a 3 mm hex

key. The actuator will maintain its position until power is provided or restored. A control signal

from the controller, however, will take priority over any manual position.

NOTES:

• Do not perform a manual override while the power supply is connected: The actuator

will not track properly when the control signal is applied. A short power-off/power-on

sequence is recommended to recalibrate the actuator.

• To hold the actuator in the manually set position, the connecting cable must be

unplugged.

Position Indicator at 0

Position Indicator at 1

Figure 8. Position Indicator.

NOTE:

The "0" and "1" position

markings are for

reference only and not

for stroke measurement.

1 2 3 4 5 6 7

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