Samson 3375, Монтаж и эксплуатация, Страница: 54 / 130

7-8 EB 8332-2 EN
Start-up and configuration
Temperature closed-loop control upon input signal failure application (see Annex A for de -
scription)
Î
Set Code 6 to POSF.
Î
Perform the wiring as described in the 'Installation' section.
%
Displayed reading: travel
Fig. 7-5: Start screen with temperature closed-loop control upon input signal failure application
(POSF)
The 0 to 10 V or 0 to 20 mA setting for the input signal is not possible in combination with
this function. The lower value must be at least 0.5 V or 1 mA.
7.4 Adjusting the limit contacts
To undo the screws on the housing cover, use a POZIDRIV ® PZ2 screwdriver to get enough
hold on the screw heads.
Mechanical limit contacts (see Fig. 7-6 to Fig. 7-8 )
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 hex screwdriver 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 contact
cam unit (21) triggers the switch contact of the upper or lower microswitch on the termi-
nal 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.
Note
Note