Adjusting The Limit Contacts; Electronic Limit Contacts; Installing The Limit Contacts - Samson 3374 Mounting And Operating Instructions

Electronic limit contacts

7.2 Adjusting the limit contacts

Note:

To undo the screws on the housing
cover, use a Pozidriv PZ2 screwdriver
to get enough hold on the screw
heads.
1. Undo screws on housing cover and take
the cover off the actuator.
2. Switch on power supply.
3. Move the valve, using manual override
or the "manual level" operating mode, to
the point at which the contact should re-
act.
4. Use the 4 mm hex wrench to turn spindle
of the adjustment gears (18) for the up-
per limit contact or for the lower limit
contact until the associated contact cam
on the contact cam unit (21) triggers the
switch contact of the upper or lower mi-
croswitch on the terminal board (17).
5. Replace cover. Briefly turn the fastening
screws counterclockwise with a screw-
driver to center them. Then fasten down
the cover by tightening the screws.
20
8 Electronic limit contacts

8.1 Installing the limit contacts

Required accessories
To install the electronic limit contacts, the ret-
rofit kit (order no. 1402-0591) is required.
Installing limit contacts:
DANGER!
Risk of electric shock
2.04Before installing electrical acces-
sories, switch off the power supply
and disconnect the signal input!
Note:

To undo the screws on the housing
cover, use a Pozidriv PZ2 screwdriver
to get enough hold on the screw
heads.
1. Undo screws on housing cover and take
the cover off the actuator.
2. Move the actuator stem to the end posi-
tion depending on the fail-safe action
"Actuator stem extends" or "Actuator
stem retracts". Refer to section 6.
3. Connect connecting cable to the plug-in
location intended for it on the board.
4. Position the terminal board (17, see
Fig. 8) at the base of the support at a
45° angle (approx.) with the relay point-
ing towards the edge of the intermediate
board. Swivel the upper end of the termi-
nal board until the board is properly en-
gaged.
EB 8331-4 EN