Operation; Three-Step Mode; Mechanical Override - Samson 3374 Mounting And Operation Instructions

Electric actuator

Hide thumbs Also See for 3374:

Table of Contents

7 Operation

After connecting the supply voltage, the ac-

tuator is ready for use.

In three-step mode, the actuator stem is

moved in the corresponding direction by ap-

plying a signal to the terminal eL or aL (see

Fig. 7-1).

Actuators with fail-safe action additionally

require a constant supply voltage (see the

'Installation' section).

Fig. 7-1: Three-step control

EB 8331-3 EN

To operate the manual override, place a

4 mm hex wrench on the red actuator shaft

located at the side of the housing (see

Fig. 7-2). Turn the hex wrench clockwise to

move the actuator in 'aL' direction and

counterclockwise to move it in the 'eL'

direction (see Fig. 7-1). The hex wrench is

included in the scope of delivery. It is

attached to the bottom of the housing.

Fig. 7-2: Actuating shaft for manual override

Note

Manual override is only possible in actuators

with fail-safe action when the supply voltage

(terminals L and N) is connected.

Operation

7-1

Table of Contents