Chapter 3
Signal Connections
©
National Instruments Corporation
3-9
SCXI-1102/B/C User Manual
The signals on the rear signal connector are analog output signals,
digital I/O signals, or digital timing signals. The following section
contains signal connection guidelines for each of these groups.
Analog Output Signal Connections
Pins 1 through 4 and pin 19 of the rear signal connector are analog
output signal pins. Pins 1 and 2 are AOGND signal pins, pin 4 is the
MCH0- pin, and pin 19 is the OUTREF pin. With software, you can
configure pin 1, 2, 4 or 19 to connect to the module’s analog ground
(AGND). You can use the pin that is connected to AGND as a general
analog power ground tie point to the SCXI-1102/B/C module, if
necessary.
Caution:
The SCXI-1102/B/C module analog outputs are not overvoltage-protected.
Applying external voltages to these outputs can damage the
SCXI-1102/B/C module. National Instruments is
NOT
liable for any
damages resulting from such signal connections.
Note:
The SCXI-1102/B/C module analog outputs are short-circuit protected.
Digital I/O Signal Connections
Pins 24 through 27, 29, 33, 36, 37, 43, and 46 constitute the digital I/O
lines of the rear signal connector.
The SCXI-1102/B/C module digital input and output signals match the
digital I/O lines of the MIO-16 boards. When used with an SCXI-1341,
SCXI-1342, or SCXI-1344 cable assembly, the SCXI-1102/B/C module
signals match the digital lines of the Lab-NB/PC+, the PC-LPM-16, and
37
SERCLK
Input
Serial Clock—This signal clocks the data on the SER-
DATIN and SERDATOUT lines.
43, 46
RSVD
Input
Reserved
All other pins are not connected.
Pin
Signal Name
Direction
Description
!