Rockwell Automation 1770 DH,DHII,DH485 CABLE - Manual (Page 102)

Chapter
8
8-1
Planning a Data HighwayĆ485 Cable System
The DH-485 cable system gives 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-485 network.
Read this chapter carefully before beginning any construction of your cable
system.
After reading this chapter, you will be ready to start construction of your
DH-485 network. This chapter provides information to help you plan a DH-485
cable system, including:
components of a DH-485 network
necessary tools
guidelines for determining cable length
selecting the number of link couplers
harmful environmental factors
After reading this chapter, consult schematic and engineering drawings of your
facility for specific information concerning the best location for installing your
cable network.
Chapter Overview