Samson 3730 Series Mounting And Operating Instructions page 41

The wires for the reference variable must be
connected to the terminals 11 and 12 lo-
cated in the housing. Only use a current
source!
If the reference variable exceeds 22 mA,
OVERLOAD appears on the LC display to
warn the user.
Caution! The erroneous connection of a volt-
age source of just around 7 V (or around
2 V when connected to the wrong pole) can
damage the positioner.
In general, it is not necessary to connect the
positioner to a bonding conductor. Should
this be required, however, this conductor
can be connected inside the device.
Depending on the version, the positioner is
equipped with inductive limit switches
and/or a solenoid valve.
Optional
+81 -82
24 V DC
solenoid
valve
Fig. 16 · Electric connections
+11 -12 +83 -84
A3
mA
Fault
Control signal
indication
The position transmitter is operated on a
two-wire circuit. The usual supply voltage is
24 V DC. Considering the resistance of the
supply leads, the voltage at the position
transmitter terminals can be between 12 V
and 30 V DC.
Refer to Fig. 16 or the label on the terminal
strip for terminal assignment.
Note! The minimum permissible reference
variable should not fall below 3.8 mA for
operating the positioner.
Accessories:
Plastic cable gland M20 x 1.5:
Black
Blue
Nickel-plated brass Order no. 1890-4875
Adapter M20 x 1.5 to ½ NPT
Aluminum, powder-coated
A3 A2
+51 -52
+41 -42
Switching amplifier
acc. to EN 60947-5-6
Limit switches
A2
Software Software
or inductive
Order no. 8808-1011
Order no. 8808-1012
Order no. 0310-2149
Optional
A1
G
+31 -32
A
2-wire transmitter
A1 supply unit for optional
position transmitter only
EB 8384-3 EN
Connections
41