Samson 4708-5352, Монтаж и эксплуатация

Страница: 18 / 32

3.3 Manual/automatic transfer
The positioner output is routed to the actua-
tor over the manual/automatic transfer. In
automatic mode, the positioner is in
closed-loop operation. In manual mode, the
output pressure of any supply pressure regu-
lator is directly applied to the actuator. This
creates a manual bypass for the positioner.
The manual/automatic transfer unit is
mounted directly onto Types 376x, 378x
and 373x (Fig. 14) or on an adapter plate
with hook-up to the actuator (Fig. 13).
The Type 4708-53 (Fig. 15) or Type
4708-54 Supply Pressure Regulator can be
fastened onto the regulator. All other supply
pressure regulators can be connected to the
manual/automatic transfer by a piping
(hook-up).
3.3.1 Mounting on positioners
4
Insert flat gasket into recess of the man-
ual/automatic transfer unit (Fig. 14).
4
Fasten manual/automatic transfer unit to
the positioner using the two hexagon
socket screws.
4
Connect hook-up to the Supply and Out-
put connections of the manual/automatic
transfer unit.
18
EB 8546 EN
Pneumatic connections
1
Output (38)
Supply (9)
2
3
4
Supply
Output
Fig. 13 · Mounting the manual/automatic transfer using an adapter plate
1 Pneumatic control
valve with positioner
2 Adapter plate
1400-9605 (G)
1400-9606 (NPT)
3 Manual/automatic
transfer
Type 4708-82
in AUTO mode
4 Supply pressure regu-
lator with filter
(e.g. Type 4708-10)
Fig. 14 · Mounting on a positioner