Samson 3730-2 Mounting And Operating Instructions page 40

Connections
Caution!
The erroneous connection of a voltage
source of only around 7 V (or around 2 V
when connected to the wrong pole) can al-
ready damage the positioner.
In general, the positioner does not need to
be connected to a bonding conductor. If it is
necessary, 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.
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.
Optional
24 V DC
solenoid valve
control signal
(optional)
Fig. 16 · Electrical connections
40
EB 8384-2 EN
Switching amplifier according to
mA A3
Fault alarm
Note! The minimum permissible reference
variable must not fall below 3.8 mA to oper-
ate 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
Powder-coated aluminum
EN 60947-5-6
Limit switches
A2 A1
Software Software
optional: inductive
order no. 8808-1011
order no. 8808-1012
order no. 0310-2149
Optional
Two-wire transmitter
supply unit only for op-
tional position transmitter