Samson 3730 Series - Attachment of external position sensor

5-30 EB 8384-3 EN
Installation
8. Place positioner on housing (10) and
screw it tight. Taking the actuator's direc-
tion of rotation into account, adjust lever
(1) so that it engages in the correct slot
with its follower pin (Fig.5-21).
5.5.7 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,e.g.theSAMSONType3710Revers-
ingAmplier(seeMountingandOperatingIn-
structions 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.
Î Set slide switch on positioner to AIR TO
OPEN.
How the outputs are marked depends on the
reversing amplier used. Type3710: Output
1/2 = Y
1
/Y
2
5.6 Attachment of external
position sensor
Fig.5-23: Positioner unit with sensor mounted
on a micro-ow valve
Î Required mounting parts and accesso-
ries: Table 5-11
In the positioner version with an external po-
sition sensor, the sensor located in a separate
housing is attached over a plate or bracket to
the control valve. The travel pick-off corre-
sponds to that of a standard device.
The positioner can be mounted as required to
a wall or a pipe.
For the pneumatic connection either a con-
necting plate (6) or a pressure gauge bracket
(7)mustbexedtothehousing,depending
on the accessory chosen. Make sure the seals
(6.1) are correctly inserted (see Fig.5-7, bot-
tom right).
For the electrical connectiona10metercon-
necting lead with M12x1 connectors is in-
cluded in the scope of delivery.
− In addition, the instructions in sections5.12
and 5.11 apply for the pneumatic and
electrical connection.
Note
Note