Switching Amplifier - Samson 3767 Mounting And Operating Instructions

The wires for the reference variable must be
connected to the terminals 11 and 12 locat-
ed in the housing.
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 or outside on
the device.
Depending on the version, the positioner is
equipped with inductive limit contacts and/
or a solenoid valve.
Versions with position transmitter do not per-
mit the connection of additional equipment.
The position transmitter is operated on a
two-wire circuit. The usual supply voltage is
24 V DC.
Taking the resistance of the supply leads into
account, the voltage at the position transmit-
ter terminals can be between 12 and
45 V DC.
Refer to Fig. 12 or to the label on the termi-
nal block.
E
i
/
A
+11 –12
mA control
signal
Fig. 12: Electrical connections
EB 8355-2 EN
Rear
(B)
A
+41 –42 +51 –52
Switching amplifier
acc. to EN 60947-5-6
Accessories:
Device index 3767-x...x.03 and lower
Cable gland PG 13.5
Black plastic
Blue plastic
Nickel-plated brass Order no. 1400-6979
Adapter PG 13.5 to ½ NPT:
Metal to metal
Painted blue
Device index 3767-x...x.04 and higher
Cable gland M20 x 1.5
Black plastic
Blue plastic
Nickel-plated brass Order no. 1890-4875
Adapter M20 x 1.5 to ½ NPT:
Powder-coated aluminum
4.2.1 Switching amplifier
The operation of the inductive limit contacts
requires switching amplifiers in accordance
with EN 60947-5-6 to be connected in the
output circuit. Observe the relevant regula-
tions for installation in hazardous areas.
Version with position transmitter
(A)
B
+81 –82
+
–
6 to 24 V DC
solenoid valve
Order no. 1400-6781
Order no. 1400-6782
Order no. 1400-7109
Order no. 1400-7110
Order no. 1400-6985
Order no. 1400-6986
Order no. 0310-2149
G
E
i
/
A
E
i
+11 –12 +31 –32
mA control
A
signal
+ –
Transmitter supply voltage
for position transmitter only
Connections
37