Table 2-2. Signal Descriptions - National Instruments Module SCXI-1503 User Manual

Pin
A1
A13 – A16,
A29 – A32
A1, A19, A20,
A25 – A28
A2
B24 – B17,
B8 – B1
C24 – C17,
C8 – C1
A3, A4
B30 – B 25,
B16 – B9
C32 – C25,
C16 – C9
© National Instruments Corporation

Table 2-2. Signal Descriptions

Signal Name
+5 V
GND
RSVD
C GND
IEX<0..7> –,
IEX<8..15> –
IEX<0..7> +,
IEX<8..15> +
CJ SENSOR
AI <0..7> –,
AI <8..15> –
AI <0..7> +,
AI <8..15> +
Description
+5 VDC Source—Used to power circuitry on the
terminal block. 0.1 mA of source not protected.
Ground—Tied to the SCXI module ground.
Reserved—This pin is reserved. Do not connect
any signal to this pin.
Chassis Ground—Connects to the SCXI chassis.
Negative Excitation—Connects to the channel
ground reference. This is the return path for the
corresponding IEX+ channel.
Positive Excitation—Connects to the positive
current output of the channel.
Cold-Junction Temperature Sensor
Input—Connects to the temperature sensor of
the terminal block.
Negative Input Channels—Negative side of
differential input channels.
Positive Input Channels—Positive side of
differential input channels.
2-9
Chapter 2 Connecting Signals
SCXI-1503 User Manual