Configuration and Installation
Chapter 2
SCXI-1124 User Manual
2-2
© National Instruments Corporation
!
S
HOCK HAZARD
–This unit should only be opened by qualified personnel
aware of the dangers involved. Disconnect all power before removing the
cover. Always install the grounding screw. If signal wires are connected to
the module or terminal block, dangerous voltages may exist even when the
equipment is turned off. Before you remove any installed module, disconnect
the AC power line or any high-voltage sources (
≥
30 Vrms, 42.4 Vpk or
60 VDC) that may be connected to the terminal block or module.
Note: If nothing is cabled to the SCXI-1124 rear signal connector, the position of all of the
jumpers is irrelevant.
There are four jumpers on the SCXI-1124 that configure the module for the cable system that
you connect to the module rear signal connector. You connect only one module per chassis to
the DAQ board, which allows the DAQ board to communicate with all of the other modules in
each chassis. On the unconnected modules, the jumper settings are irrelevant. Tables 2-1 and
2-2 list the description and configuration of the jumper settings.
You must use software to further configure the module. Refer to your software manual or the
SCXI-1124 Register-Level Programmer Manual.
Table 2-1. Module Configuration of Your Chassis System
Jumper
Description
Configuration
W1
Position P (pullup)–Use this setting
for a single-chassis system.
Connects a 2.2 k
Ω
pullup resistor to
the SERDATOUT line. (factory
setting)
Position NP (no pullup)–Use this
setting for additional chassis in a
multichassis system. No pullup
resistor is connected to the
SERDATOUT line. (parking
position)
P
W1
NP
P
W1
NP
Table 2-2. Module Configuration of Your DAQ Board
Jumper
Configuration for DIO-Type Board
(Factory Setting)
Configuration for MIO-Type
Board
W2
W4
W3
W2
D
M
W3
D
M
D
M
W4
If you want to connect the SCXI-1124
to a DIO-type board, place all three
jumpers in the D position (factory
setting).
W2
D
M
W3
D
M
D
M
W4
If you want to connect the
SCXI-1124 to an MIO-type
board, place all three jumpers in
the M position.
