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5.3 Digital positioner
To install a positioner, a corresponding ac
-
tuator board and TROVIS-VIEW 3374 and
connecting cable 0450-1978 are necessary.
If the actuator is not already equipped with
limit switches, the basic unit (order no.
1400-8829) is also required. The unit in
-
cludes the spindle gear (2) and the interme
-
diate gear (5).
Note! Actuators with a digital positioner
cannot be equipped with a potentiometer.
1. Remove the fastening screws. Push the
actuator board (1) from its guiding to
the right. Take out the board and re-
place it with a board with positioner.
2. Clip the spindle gear (2) onto the sleeve
(3) as illustrated in Fig. 7, top. Make
sure the lateral latch is properly en-
gaged in the groove of the sleeve.
3. Plug intermediate gear (5) onto the spin-
dle (4). Place the serrated ring (10) on
top and push it down until it will not go
any further.
4. The gear (12) on the feedback potenti
-
ometer, which is equipped with a retain
-
ing ring, must be put onto its shaft corre
-
sponding with the rated travel of the
control valve. The rated travel inscription
“Nennhub 15” (on the upper side with
the retaining ring) or “Nennhub 30”
(lower side) must be legible from above
(also see Figs. 4 and 5).
5. Push the actuator board (1) back into its
guiding. Make sure that the gears are
properly engaged. Fasten the board us
-
ing screws.
EB 8331-1 EN 21
Retrofitting additional electrical equipment
Fig. 9 · Version with positioner
without (top) and with (bottom) limit switches
5 Intermediate gear
6 Contact cam
7 Cam bracket
8 Adjustment gears
10 Serrated ring
12 Gear feedback potentiometer
8751012