National Instruments pci-6110e-6111e 用户手册

Chapter 1

Introduction

 National Instruments Corporation

1-5

National Instruments offers a variety of products to use with the 611X E 
board, including cables, connector blocks, and other accessories, as 
follows:

•

Cables and cable assemblies

•

Connector blocks, shielded and unshielded 50- and 68-pin screw 
terminals

•

RTSI bus cables

•

Low channel-count signal conditioning modules, boards, and 
accessories, including conditioning for strain gauges, RTDs, 
and relays

For more specific information about these products, refer to your 
National Instruments catalogue or call the office nearest you.

National Instruments offers cables and accessories for you to prototype 
your application or to use if you frequently change board 
interconnections.

If you want to develop your own cable, however, the following 
guidelines may be useful:

•

For the analog input signals, shielded twisted-pair wires for each 
analog input 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.

•

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 National Instruments.

PCI_E.book  Page 5  Thursday, June 25, 1998  12:55 PM