Samson TROVIS 3730-1 Translation Of Original Instructions page 56

Installation
b) Version for double-acting
actuator
A reversing amplifier must be additionally
mounted for applications with double-acting
(DAP) actuators or applications with sin-
gle-acting (SAP) actuators that include par-
tial stroke testing.
In this case, a special adapter bracket (4) is
required for mounting.
Î See Fig. 5-19.
1. Seal the signal pressure output at the
back of the positioner with the screw
plug (4, order no. 0180-1254) and the
associated O-ring (order no. 0520-
0412) if the screw plug is not yet in
place.
2. Fasten the adapter block (1) to the actua-
tor's NAMUR interface using the four
fastening screws (2). Make sure the seals
are correctly seated.
3. Mount the follower wheel (3) onto the ac-
tuator shaft. Use the matching adapter
(see Table 5-9 on page 5-43).
4. Place the adapter bracket (4) onto the
adapter block (1) and fasten it using the
fastening screws (5). Make sure the seals
are correctly seated.
5. Insert and fasten the follower pin into the
90° position on the positioner's lever (see
Fig. 5-16 on page 5-20).
6. Align the positioner on the adapter
bracket (1) in such a way that the follow-
er pin engages into the actuator's follow-
er wheel (3).
5-22
7. Fasten the positioner onto the adapter
bracket (4) using the fastening screws
(6).
8. Mount the Type 3710 Reversing Amplifi-
er (7) together with the two guide bush-
ings (8) and terminal plate (9) onto the
adapter bracket using the associated fas-
tening screws (10). Make sure the seals
are correctly seated.
9. Remove the vent plug at the adapter
block and seal the opening with the G ¼
screw plug.
10. Mount the turnboard marked 'Doppel'
for double-acting actuators or the turn-
board marked 'PST' for single-acting ac-
tuators with partial stroke testing. See
Fig. 5-18. Make sure the seals are cor-
rectly seated.
Fig. 5-18: Mounting the turnboard
EB 8484-1 EN