Connecting Current Loop Inputs - Measurement Computing Data Translation DT3034 User Manual

Wiring Signals

Connecting Current Loop Inputs

Figure 9 shows how to connect a current loop input to the DT740 screw terminal panel.
+V
CC
DT740 Panel
4 to 20 mA
Analog Input 0
TB1
R17
+
TB50
TB2
TB51
-
Analog Input 0
Return
R1
Analog Ground
Analog Shield
Use current shunt resistor R17 to convert current

to voltage; 250 for 4 to 20 mA = 1 to 5 V. The
common side of the external loop supply must
either connect to analog ground or, if needed, to a
bias return resistor (R1 in this case).
Figure 9: Connecting Current Inputs to the DT740 (Shown for Channel 0)
49