© National Instruments
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2-7
M Series User Manual
You can use either connector on M Series devices to control an SCC module carrier.
Note
(NI 6225/6255 Devices)
SCC is supported only on Connector 0.
Note
PCI Express users should consider the power limits on certain SCC modules
without an external power supply. Refer to the device specifications, and the
When to
Use the Disk Drive Power Connector
section of Chapter 1,
Getting Started
, for
information about power limits and increasing the current the device can supply on
the +5 V terminal.
SCXI
SCXI is a programmable signal conditioning system designed for measurement and automation
applications. To connect your M Series device or module to an SCXI chassis, use the SCXI-1349
adapter and your 68-pin cable.
Use Connector 0 of your M Series device to control SCXI in parallel and multiplexed mode. Use
Connector 1 of your M Series device to control SCXI in parallel mode.
Note
(NI 6225/6255 Devices)
SCXI is supported only on Connector 0.
Note
When using Connector 1 in parallel mode with SCXI modules that support
track and hold, you must programmatically disable track and hold.
You also can use an M Series PXI module to control the SCXI section of a PXI/SCXI
combination chassis, such as the PXI-1010 or PXI-1011. The M Series device in the rightmost
PXI slot controls the SCXI devices. No cables or adapters are necessary.
Refer to the documentation for your SCXI chassis and modules for detailed information about
using SCXI with a DAQ device.
68-Pin Custom Cabling and Connectivity
The CA-1000 is a configurable enclosure that gives user-defined connectivity and flexibility
through customized panelettes. Visit
ni.com
for more information about the CA-1000.
NI offers cables and accessories for many applications. However, if you want to develop your
own cable, adhere to the following guidelines for best results:
•
For AI signals, use shielded, twisted-pair wires for each AI pair of differential inputs.
Connect the shield for each signal pair to the ground reference at the source.
•
Route the analog lines separately from the digital lines.
•
When using a cable shield, use separate shields for the analog and digital sections of the
cable. To prevent noise when using a cable shield, use separate shields for the analog and
digital sections of the cable.
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