Rockwell Automation 1770 DH,DHII,DH485 CABLE - Manual (Page 17)

Chapter
2
2-1
Planning a Data Highway or
Data Highway Plus Cable System
The Data Highway and Data Highway Plus cable systems give you
flexibility to design a communication network that is tailored to your
particular needs. To take full advantage of this flexibility, you should spend
sufficient time planning how to install your cable system before
assembling any of the hardware.
Important: This chapter provides important specifications, guidelines and
precautions that you need to know before you construct your DH or DH+
network. Read this chapter carefully before beginning any construction of
your cable system.
After you have read this chapter you will be prepared to begin constructing
your DH or DH+ network. This chapter provides information to help you
plan a DH or DH+ cable system, including:
components of a network constructed with station connectors and
droplines
daisy chaining (DH+ only)
necessary tools
determining cable length
selecting the type of station connector
selecting the number of station connectors
harmful environmental factors
After reading this chapter, consult schematic and engineering drawings of
your plant facility for specific information concerning the best location for
installing your cable network.
Chapter Overview