National Instruments SCXI-1121 - Manual (Page 35)

Chapter 2 Configuration and Installation
© National Instruments Corporation 2-19 SCXI-1121 User Manual
The signals on the front connector are all analog except pins A6, C6, and
C8, which are digital controls. These analog signals can be divided into
three groups—the analog input channels, the excitation channels, and the
temperature sensor.
A20 CH2+ Positive Input Channel 2—This pin is connected to the
input channel 2 positive input.
C20 CH2– Negative Input Channel 2—This pin is connected to the
input channel 2 negative input.
A22 EGND1 Excitation Ground 1—This pin connects to the excitation
ground 1 via a 51 k
Ω
resistor.
A24 EX1+ Positive Excitation Output 1—This pin is connected to the
excitation channel 1 positive output.
C24 EX1– Negative Excitation Output 1—This pin is connected to the
excitation channel 1 negative output.
A26 CH1+ Positive Input Channel 1—This pin is connected to the
input channel 1 positive input.
C26 CH1– Negative Input Channel 1—This pin is connected to the
input channel 1 negative input.
A28 EGND0 Excitation Ground 0—This pin connects to the excitation
ground 0 via a 51 k
Ω
resistor.
A30 EX0+ Positive Excitation Output 0—This pin is connected to the
excitation channel 0 positive output.
C30 EX0– Negative Excitation Output 0—This pin is connected to the
excitation channel 0 negative output.
A32 CH0+ Positive Input Channel 0—This pin is connected to the
input channel 0 positive input.
C32 CH0– Negative Input Channel 0—This pin is connected to the
input channel 0 negative input.
Pin Signal Name Description