Samson TROVIS 3730-1 - 5.9 Reversing amplifier for double-acting actuators

62 EB 8484-1 EN
Mounting and start-up
5.9 Reversing amplier for
double-acting actuators
For the use with double-acting actuators, the
positionermustbettedwithareversingam
-
plier:
Î SAMSONType3710ReversingAmplier,
u EB8392
The following applies to all reversing am-
pliers:
The signal pressure of the positioner is sup-
pliedattheoutput1ofthereversingampli-
er. An opposing pressure, which equals the
required supply pressure (Z) when added to
the pressure at output 1, is applied at output
2.
The following relationship applies:
output 1 + output 2 = Supply pressure (Z).
Connect output 1 to the signal pressure con-
nection on the actuator that causes the valve
to open when the pressure rises.
Connect output 2 to the signal pressure con-
nection on the actuator that causes the valve
to close when the pressure rises.
5.10 Attaching positioners with
stainless steel housings
Positioners with stainless steel housings re-
quire mounting parts that are completely
made of stainless steel or free of aluminum.
The pneumatic connecting plate and pres-
sure gauge bracket are available in stainless
steel (order numbers listed below). The
Type3710 Pneumatic Reversing Amplier is
also available in stainless steel.
Connecting plate
(stainless steel)
G¼
¼NPT
1400-7476
1400-7477
Pressure gauge
bracket
(stainless steel)
G¼
¼NPT
1402-0265
1400-7108
Table1toTable7applyforattachingposi-
tioners with stainless steel housings with the
following restrictions:
Direct attachment
AllmountingkitsfromTable2andTable3
can be used. The connection block is not re-
quired. The stainless steel version of the
pneumatic connecting plate routes the air in-
ternally to the actuator.
Attachment according to IEC60534-6
(NAMUR rib or attachment to rod-type
yokes)
AllmountingkitsfromTable4canbeused.
Connecting plate in stainless steel.
Note