Configuration and Installation
Chapter 2
SCXI-1162HV User Manual
2-6
© National Instruments Corporation
Table 2-1. Digital Signal Connections, Jumper Settings (Continued)
Jumper
Description
Configuration
W3
Position P (pull-up)—Use this setting for a single-
chassis system or for the first chassis in a
multichassis system. Connects a pull-up resistor to
SERDATOUT. (Factory setting)
Position NP (no pull-up)—Use this setting for
additional chassis in a multichassis system. No pull-
up resistor is connected to SERDATOUT.
P
NP
P
NP
•
•
•
•
W2
Parking position—Disconnects SERDATOUT line.
Use for parallel mode.
Configures SERDATOUT for MIO-type board.
Includes MIO series, Lab series, and PC-LPM-16.
Factory setting—Configures SERDATOUT for DIO-
type board.
MIO
DIO
PAR
•
•
•
•
MIO
DIO
PAR
MIO
DIO
PAR
•
•
Note: The shaded area indicates the position of the jumper.
Supplementary Jumper W3 Configuration Information
Jumper W3, when set to position P, connects a 2.2 k
Ω
pull-up resistor to the SERDATOUT line.
An open-collector driver actively drives low or goes to a high-impedance state, relying on a pull-
up resistor to make the signal line go high. If too many pull-up resistors are attached to the
SERDATOUT line, the drivers cannot drive the line low. To prevent this, set jumper W3 to
position P on only one of the SCXI-1162HVs that are cabled to the DAQ board in a multichassis
system. It does not matter which of the SCXI-1162HVs cabled to the DAQ board has the pull-up
connected.
Hardware Installation
You can install the SCXI-1162HV in any available SCXI chassis. After you have made any
necessary changes and have verified and recorded the jumper settings on the form in
Appendix B, Customer Communication, you are ready to install the SCXI-1162HV. The
following are general installation instructions; consult the user manual or technical reference
manual of your SCXI chassis for specific instructions and warnings.
1. Turn off the computer that contains the DAQ board or disconnect it from your
SCXI chassis.
2. Turn off the SCXI chassis. Do not insert the SCXI-1162HV into a chassis that is turned on.