National Instruments SCXI-1112, Руководство пользователя

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Chapter 3 Signal Connections
© National Instruments Corporation 3-5 SCXI-1112 User Manual
Rear Signal Connector Pin Descriptions
The rear signal connector on the cabled module is the interface between the
DAQ device and all modules in the SCXI chassis.
Pin Signal Name Direction Description
1, 2 RSVD Output Reserved
3 MCH0+ Output Positive Module Analog Output—This pin connects to
the positive side of the differential analog input channel
0 of the DAQ device.
4 MCH0- Output Negative Module Analog Output—In the reset state of
the module, this pin is configured to connect to the
analog reference.
24, 33 DGND — Digital Ground—These pins supply the reference for
DAQ device digital signals and are tied to the module
digital ground.
25 SERDATIN Input Serial Data In—The DAQ device uses this signal to
program modules in all slots.
26 SERDATOUT Output Serial Data Out—A cabled module uses this signal to
return data from any module to the DAQ device.
27 DAQD*/A Input DAQ Device Data/Address Line—The DAQ device
asserts this signal to indicate to the module whether the
incoming serial stream is data or address information.
29 SLOT0SEL* Input Slot 0 Select—The DAQ device asserts this signal low
to indicate that the SERDATIN line information is
going to the Slot 0 controller instead of a module.
36
SCANCLK Input
Scan Clock—A rising edge indicates to the scanned
SCXI module that the DAQ device has taken a sample
and causes the module to advance channels.
37
SERCLK Input
Serial Clock—This signal clocks the data on the
SERDATIN and SERDATOUT lines.
43, 46
RSVD Input
Reserved
All other pins are not connected.