Data Translation DT3000 Series, User Manual, Page: 50 / 156

Wiring Signals
49
Figure 10: Connecting Differential Voltage Inputs from a Grounded Signal Source
(Shown for Channel 0)
Connecting Current Loop Inputs
Figure 11 shows how to connect a current loop input (channel 0, in this case) to the DT730 or
DT730-T screw terminal panel.
Figure 11: Connecting Current Inputs to the DT730 or DT730-T Screw Terminal Panel
(Shown for Channel 0)
Grounded
Signal
Source
+
-
Analog In 0
Analog In 0
Return
E
s
Signal Source
Ground V
g1
DT730 or
DT730-T
Panel
Install resistor R1 for bias return if the
external ground is floating.
TB100 TB99
TB36
R1
DT730
or DT730-T
Panel
Analog Input 0
Analog Input 0
Return
TB36
Analog Ground
Use current shunt resistor R33 to convert current to
voltage; 250
Ω
for 4 to 20 mA = 1 to 5 V.
If needed, also use resistor R1 to provide a bias return
path.
4 to 20 mA
+V
CC
TB100
TB99
R33
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