Front Connector Signal Descriptions; Table 3-1. Scxi-1120/D Front Connector Signal Descriptions - National Instruments SCXI-1120/D User Manual

Chapter 3 Signal Connections

Front Connector Signal Descriptions

Pin
A2
C2
A4
C4
A6, C6, C8
A8, A10, C10, A16,
C16, A22, C22, A28,
C28
A12, A14, A18, A20,
A24, A26, A30, A32
C12, C14, C18, C20,
C24, C26, C30, C32
SCXI-1120/D User Manual
SCXI-1120/D front connector signal descriptions are listed in Table 3-1.

Table 3-1. SCXI-1120/D Front Connector Signal Descriptions

Signal Name
CHSGND
DTEMP
+5 V
MTEMP
RSVD
Not Connected
CH7+ through CH0+
CH7– through CH0–
The signals on the front connector are all analog with the exceptions of pins
A6, C6, and C8. The analog signals can be divided into two groups—the
analog input channels and the temperature sensor.
Description
Chassis Ground—Tied to the SCXI chassis.
Direct Temperature Sensor—Connects the
temperature sensor to pin 18 of the rear signal
connector MCH7- when the terminal block is
configured for direct temperature connection
and jumper W41 is in position 3.
+5 VDC Source—Powers temperature sensor
on the terminal block. 0.2 mA of source not
protected.
Multiplexed Temperature Sensor—Connects
temperature sensor to output multiplexer.
Reserved—Reserved for future use. Do not
connect any signals to these pins. TTL/CMOS
output. They are not protected.
Do not connect any signals to these pins.
Positive Input Channels—Positive inputs to
channels 7 through 0, respectively.
Negative Input Channels—Negative inputs to
channels 7 through 0, respectively.
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