Measurement Computing Data Translation DT3010 Series, User Manual, Page: 47 / 232

Chapter 3
46
Figure 13: Layout of the STP268 Screw Terminal Panel
Configuring Jumper W1 - Common Ground Sense
When shipped from the factory, jumper W1 connects the low side of the input amplifier (Amp
Low) on the DT3010-268 or DT3010/32-268 board to analog ground.
When using pseudo-differential analog inputs, remove jumper W1 and connect Amp Low to a
remote common-mode voltage to reject offset voltages common to all 32 input channels. Refer
to
page 65 for an example of using jumper W1.
Configuring Resistors R1 to R16 - Bias Return
Resistor locations R1 to R16 connect the low side of analog input channels to analog ground.
These resistor locations are typically used when connecting differential inputs to analog input
channels 0 to 15, where R1 corresponds to analog input channel 0, and R16 corresponds to
analog input channel 15.
The high side of the corresponding analog input channels returns the source input impedance
through the bias return resistors to the low side of the channels, and then to analog ground.
Typical resistor values are 1 k
Ω
to 100 k
Ω
depending on the application. Refer to page 66 for an
example of using bias return resistors.
J1
1
R1
to
R16
R17
to
R32
16
17
32
33
40
41
52
55
68
W1
Jumper and
Resistors