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S5-115U Manual
Connecting Transducers with Module 460-7LA12
The inherently short-circuit-proof supply voltage is fed to the two-wire transducer over the range
card.
Four-wire transducers have a separate power supply.
The diagram below shows how to connect two-wire and four-wire transducers.
Module with two-wire transducer
/
M
L-
ext.
L+
+
I
Trans-
4..20 mA
ducer
-
6ES5 498-1AA51 range card
(with internal circuitry)
EWA 4NEB 811 6130-02b
/
L+
M
L-
ext.
M+
M -
MUX,
ADC
Reference bus
Figure 10-8. Connecting Transducers
Analog Value Processing
Module with four-wire transducer
U
(220 V)
C
+
I
Trans-
4..20 mA
ducer
-
Observe max. perm.
potential difference!
6ES5 498-1AA71 range card
(with internal circuitry)
M+
M -
Reference bus
10-11
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