Adjusting The Limit Contacts - Samson 3374 Series Mounting And Operating Instructions

Start-up and configuration

7.4 Adjusting the limit contacts

Note
To undo the screws on the housing cover, use a POZIDRIV
hold on the screw heads.
Mechanical limit contacts (see Fig. 7-6)
1. Undo screws on housing cover and take the cover off the actuator.
2. Switch on supply voltage.
3. Move the valve, using manual override or the "manual level" operating mode, to the
point at which the contact should react.
4. Use a 4 mm hex wrench to turn the spindle of the adjustment gears (18) for the upper
limit contact or for the lower limit contact until the associated contact cam (19) of the con-
tact cam unit (21) triggers the switch contact of the upper or lower microswitch on the ter-
minal board (17).
5. Replace cover. Briefly turn the fastening screws counterclockwise with a screwdriver to
center them. Then fasten down the cover by tightening the screws.
Electronic limit contacts
The electronic limit contacts are adjusted at the operating controls of the actuator (see An-
nex A).
7-8
PZ2 screwdriver to get enough
®
EB 8331-4 EN