National Instruments AT E Series - Manual (Page 17)

Chapter 1 Introduction
© National Instruments Corporation 1-5 AT E Series User Manual
Optional Equipment
NI offers a variety of products to use with the AT E Series device,
including cables, connector blocks, and other accessories, as follows:
• Cables and cable assemblies, shielded and ribbon
• Connector blocks, shielded and unshielded 50-, 68-, and 100-pin screw
terminals
• RTSI bus cables
• SCXI modules and accessories for isolating, amplifying, exciting, and
multiplexing signals for relays and analog output. With SCXI you can
condition and acquire up to 3,072 channels.
• Low channel count signal conditioning modules, devices, and
accessories, including conditioning for strain gauges and RTDs,
simultaneous sample and hold, and relays
For more specific information about these products, refer to
ni.com/catalog or call the office nearest you.
Custom Cabling
National Instruments offers cables and accessories for you to prototype
your application or to use if you frequently change device interconnections.
If you want to develop your own cable, however, the following guidelines
may be useful:
• For the AI signals, shielded twisted-pair wires for each AI pair yield
the best results, assuming that you use differential inputs. Tie the shield
for each signal pair to the ground reference at the source.
• You should route the analog lines separately from the digital lines.
• When using a cable shield, use separate shields for the analog and
digital halves of the cable. Failure to do so results in noise coupling
into the analog signals from transient digital signals.
Mating connectors and a backshell kit for making custom 68-pin cables are
available from NI.