Front Signal Connector Signal Descriptions; Analog Input Signal Connections - National Instruments SCXI-1104 User Manual

Front Signal Connector Signal Descriptions

Pin
A1
A2, A5, A16, A24,
A32
A3, A4
B1–B32
C1–C32
All other pins are not connected.
Cautions
channels and chassis ground) can damage the SCXI-1104/C module, the SCXIbus, and the
DAQ device. National Instruments is not liable for any damage or injuries resulting from
such signal connections.
Applying a voltage greater than ±42 VAC
electrical shock hazard. National Instruments is not liable for any damages or injuries
resulting from such voltage application.
© National Instruments Corporation
Signal Name
+5 V
CGND
RSVD
CH31– through CH0–
CH31+ through CH0+

Analog Input Signal Connections

The signal terminals for the positive input channels are found in Figure 3-1
column C. The signal terminal for each corresponding negative input
channel is found in Figure 3-1 column B. Each input pair goes to a separate
filter and amplifier that is multiplexed to the module output buffer as shown
in Figure 5-1.
The differential input signal range of an SCXI-1104/C module input
channel is 30 VAC
range is the maximum measurable voltage difference between the positive
and negative channel inputs. The common-mode input signal range of an
SCXI-1104/C module input channel is ±60 VDC with respect to the chassis
ground. This common-mode input range for either positive or negative
channel input terminal is the maximum input voltage that results in a valid
measurement.
Subject to the limits stated above, you can connect either floating or
ground-referenced signal sources to the SCXI-1104/C input channels
without using bias resistors.
Exceeding the input damage level (±42 VAC
+5 VDC Source
Chassis Ground—Tied to the SCXI chassis.
Reserved
Negative Input Channels—Negative side of differential input
channels.
Positive Input Channels—Positive side of differential input channels.
, ±42 VAC , and ±60 VDC. This differential input
rms peak
or 60 VDC to the SCXI-1104/C is an
peak
3-3
Chapter 3 Signal Connections
Description
or 60 VDC between input
peak
SCXI-1104/C User Manual