Samson 3767, Translation Of Original Instructions

Page: 52 / 112

5-28 EB 8355-2 EN
Installation
The maximum permissible values specified
in the statement of conformity and its ad -
denda apply when interconnecting the
equipment with energy-limited circuits in
type of protection Ex nL IIC.
The wires for the set point must be connected
to the terminals 11 and 12 located in the
housing.
In general, it is not necessary to connect the
device 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 switches 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. 5-14 or to the label on the ter-
minal block.
5.7.1 Switching amplifier
The operation of the inductive limit switches
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.
+41 –42 +51 –52 +81 –82 +31 –32
G
E
i
+ –
+
–
(B)
A
(A)
B
A
+11 –12 +11 –12
E
i
/
E
i
/
A A
mA control
signal
6 to 24 V DC
solenoid valve
Transmitter supply voltage
for position transmitter only
Rear Version with position transmitter
Switching amplifier
acc. to EN 60947-5-6
Fig. 5-14: Electrical connections