
Analog modules
5.15 Connecting loads/actuators to voltage outputs
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
239
1
+24 V
L+
Q
V
S+
S-
M
ANA
0 V
M
U
ISO
R
L
L +: Terminal for 24 VDC supply voltage
Q
V
: Analog output voltage
S +: Sensing line (positive)
S -: Sensing line (negative)
M
ANA
: Reference potential of the analog circuit
M : Ground
U
ISO
: Potential difference between M
ANA
and chassis ground
(1) Chassis ground
Figure 5-19 4-conductor connection of loads to a voltage output of an electrically isolated analog
output module
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