Reversing Amplifier (1079-1118 Or 1079-1119) - Samson Series 3730 Mounting And Operating Instructions

The following applies to all reversing am-
plifiers:
The signal pressure of the positioner is sup-
plied at the output 1 of the reversing amplifi-
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.
Î Set slide switch on positioner to AIR TO
OPEN.
Note:

How the outputs are marked depends
on the reversing amplifier used:
− Type 3710: Output 1/2 = Y
− 1079-1118 and 1079-1119:
Output 1/2 = A
4.6.1 Reversing amplifier
(1079-1118 or 1079-
1119)
Fig. 14
1. Mount the connecting plate (6) from the
accessories in Table 5 to the positioner.
Make sure that both O-rings (6.1) are
seated correctly.
EB 8384-6 EN
Attachment to the control valve – Mounting parts and accessories
/Y
1 2
/A
1 2
2. Thread the special nuts (1.3) from the ac-
cessories of the reversing amplifier into
the boreholes of the connecting plate.
3. Insert the gasket (1.2) into the recess of
the reversing amplifier and slide both the
hollowed special screws (1.1) into the
connecting boreholes A
4. Place the reversing amplifier onto the
connecting plate (6) and screw tight us-
ing both the special screws (1.1).
5. Use a screwdriver (8 mm wide) to screw
the enclosed filters (1.6) into the connec-
tion boreholes A
NOTICE
Air can escape uncontrolled from the
signal pressure connection!
Do not unscrew the sealing plug (1.5)
out of the reversing amplifier.
Note:

The rubber seal (1.4) is not required
and can be removed when the seal-
ing plug is used.
6. After initialization, set Code 16 (Pressure
limit) to No.
Pressure gauge attachment
The mounting sequence shown in Fig. 14 re-
mains unchanged. Screw a pressure gauge
bracket onto the connections A
Pressure gauge
bracket
Pressure gauges for supply air Z and output
A1 as listed in Table 2 to Table 7.
and Z.
1
and Z.
1
and Z.
1
G ¼ 1400-7106
¼ NPT 1400-7107
41