Connecting Current Loop Inputs; Inputs - Data Translation DT9828 User Manual

Connecting Current Loop Inputs

You connect current loop inputs to the Analog Input screw terminal block (TB1) of the DT9828
module, shown in
Figure 9 shows how to connect a current loop input to a DT9828 module.
CH 0+
4 to 20 mA
CH 0–
Figure 9: Connecting Current Inputs (Shown for Analog Input Channel 0)
Figure 5 on page 34.
DT9828
Analog Input Terminal Block
TB1
1
2
.
.
.
User-installed resistor
The user-installed resistor connects the high side of
the channel to the low side of the corresponding
channel, thereby acting as a shunt.
Ω
If, for example, you add a 1
connect a 4 to 20 mA current loop input to channel 0,
the input range is converted to 4 mV to 20 mV.
Be sure to choose a resistor such that the voltage
developed across it remains within the ±156 mV
input range of the DT9828.
Wiring Signals
resistor, and then
37