If, with voltage outputs, an excessively great voltage drop must be
expected on the lines to the load, you must route the sensor lines S+(x)
and S-(x) to the load.
When voltage outputs are not used, the S+(x) sensor lines in the front
connector must be connected to the corresponding voltage output
terminals (QV(x)) with wire jumpers. The S-(x) sensor lines must be
connected to M
ANA
with wire jumpers.
You must also insert the same jumpers if only current outputs are
used. Unused current outputs may remain open.
The maximum load for the current outputs including line resistance,
must not exceed 300 ohms.
Connecting loads to voltage
outputs
The voltage outputs of the 470 analog output module are wired as
follows:
Four-wire circuit
The S+(x) and S-(x) sensor lines must be routed to the load (four-wire
circuit) if the voltage drop on the lines to the load is not negligible.
The common connection for the voltage outputs is M
ANA
. If the
voltage drop on lines to the load is negligible, you can connect S+(x)
to QV(x) and S-(x) to M
ANA
in the front connector.
When voltage outputs are unused, you must insert jumpers in the front
connector, e.g. QV(3) to S+(3) and S-(3) to M
ANA
for unused voltage
output 3 (see previous section).
+
-
QV 0
S + 0
S - 0
+
-
+
-
M
ANA
No Load
Jumper
Jumper
QV 1
S + 1
S - 1
QV 2
S + 2
S - 2
QV 3
S + 3
S - 3
at QV 3
M
ANA
Figure 9-41
Connecting Loads
9
The 470 Analog Output Module
System Manual
C79000-B8576-C109-03
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