Samson 3730 Series Mounting And Operating Instructions page 54

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. 5-15
1. Fasten the adapter block (1) to the actua-
tor's NAMUR interface using the four
fastening screws (2).
Î Make sure that the seals are correctly
seated.
2. Mount the follower wheel (3) onto the
actuator shaft. Use the matching adapter
(see Table 5-9).
3. Place the adapter bracket (4) onto the
adapter block (1) and fasten it using the
fastening screws (5).
Î Make sure that the seals are correctly
seated.
4. Insert and fasten the follower pin in the
90° position on the positioner's lever
(see Fig. 5-12).
5. 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).
6. Fasten the positioner onto the adapter
bracket (4) using the fastening screws
(6).
5-20
7. 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).
Î Make sure that the seals are correctly
seated.
8. Remove the vent plug at the adapter
block and seal the opening with the G ¼
screw plug.
9. 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. 5-14.
Î Make sure that the seals are correctly
seated.
Fig. 5-14: Mounting the turnboard
EB 8384-4 EN