Samson Electri Actuator Type 3374 EB 8331-1 EN - Manual (Page 22)

5.3 Resistance transmitters
Actuators with a digital positioner cannot be
equipped with resistance transmitters.
To install the resistance transmitters, an actu-
ator board with the appropriate potentiom-
eters and gears (12 and 13) is required.
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 potentiom-
eters.
2. Clip the spindle gear (2) onto the sleeve
(3) as illustrated in Fig. 10.1 (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 1 (4.1). Place the serrated ring (10)
on top and push it down as far as it will
go.
Note: At this point, follow the instructions
described in section 5.1.2 on page 18 when
a new intermediate plate (with index 6) is
used.
4. The potentiometer gears (12 and 13)
with retaining rings must be put onto
their shafts corresponding with the rated
travel of the valve. The rated travel in-
scription 'Nennhub 15' or B (on the up-
per side with the retaining ring) or
'Nennhub 30' or A (lower side) must be
legible from above (also see Figs. 5 and
6).
5. Push the actuator board back into its
guiding. Make sure that the gears are
properly engaged. Fasten the board us-
ing screws.
4
Adjust the resistance transmitters as de-
scribed in section 4.2.2.
22
EB 8331-1 EN
Retrofitting additional electrical equipment
Fig. 11 · Version with resistance transmitter
10 5 2 13 12 1
1 Actuator board
2 Contact cam
5 Intermediate gear
10 Serrated ring
12 Gear potentiometer 1
13 Gear potentiometer 2