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 and
45 V DC.
For terminal assignment, refer to Fig. 12 or
the label on the terminal strip.
Selecting cables and wires:
Observe Clause 12 of EN 60079-14: 2008
(VDE 0165 Part 1) when installing intrinsi
-
cally safe circuits. The Subclause 12.2.2.7
applies when running multi-core cables con
-
taining more than one intrinsically safe cir-
cuit.
In particular, the radial thickness of the con-
ductor insulation for common insulation ma-
terials, such as polyethylene, must have a
minimum radial thickness of 0.2 mm.
The diameter of an individual wire in a
fine-stranded conductor must not be smaller
than 0.1 mm. Protect the conductor ends
against splicing, e.g. by using wire-end fer-
rules.
When two separate cables are used for con
-
nection, an additional cable gland can be
installed.
Seal cable entries left unused with plugs.
Devices used at ambient temperatures be
-
low –20 °C must be fitted with metal cable
glands.
Equipment for use in zone 2/zone 22
In equipment operated with type of protec
-
tion Ex nA II (non-sparking equipment) ac
-
cording to EN 60097-15: 2003, circuits
may be connected, interrupted or switched
while energized only during installation,
maintenance or repair.
Equipment connected to energy-limited cir-
cuits with type of protection Ex nL (en-
ergy-limited equipment) according to
EN 60097-15: 2003 may be switched un-
der normal operating conditions.
The maximum permissible values specified
in the Statement of Conformity or its ad-
denda apply when interconnecting the
equipment with energy-limited circuits in
type of protection Ex nL IIC.
30 EB 8355-1 EN
Connections
+41 –42 +51 –52 +81 –82 +31 –32
G
E
i
+
–
+
–
(B)
A
(A)
B
A
+11 –12 +11 –12
E
i
/
E
i
/
AA
Fig. 12 · Electrical connections
Switching amplifier
acc. to EN 60947-5-6
Voltage supply for transmitter,
only for position transmitter
On the rear
Version with position transmitter
6 to 24 V DC
solenoid valve
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