9.7.8
Connecting Loads to the
470 Analog Output Module
The voltage at the load is measured at a high resistance via the sensor
lines (S+/S-) of voltage output QV, so that voltage drops on the load
lines do not falsify the load voltages. Lines S+(x) and S-(x) should
therefore be directly connected to the load (four-wire circuit). The
voltage drops on the lines from QV(x) to the load and from the load to
M
ANA
must not exceed 3 V.
QV(x)
Voltage output, voltage on Channels 0 to 7
QI(x)
Current output, current on Channels 0 to 7
S+(x)
Sensor line (+) for Channels 0 to 7
S- (x)
Sensor line (-) for Channels 0 to 7
M
ANA
Ground terminal for the analog section
Connecting loads to current
and voltage outputs
When current and voltage outputs are used on the 470-4UA/-4UC...
analog output modules, connect the loads as follows:
+
-
Load (Voltage)
+
-
Load (Voltage)
QV (x)
S+ (x)
S - (x)
QI (x)
I
M
ANA
Figure 9-39
Connecting Loads
+
-
+
-
QV 0
M
ANA
S + 0
S - 0
QI 0
+
-
+
-
+
-
+
-
+
-
M
ANA
M
ANA
Current
Output
Not Current
and Not
Voltage
Output
Jumper
QV 1
S + 1
S - 1
QI 1
QV 2
S + 2
S - 2
QI 2
QV 3
S + 3
S - 3
QI 3
QV 4
S + 4
S - 4
QI 4
_
Jumper
Jumper.
Only
Jumper
Figure 9-40
Connecting Loads
The 470 Analog Output Module
System Manual
9 - 114
C79000-B8576-C109-03
