Rockwell Automation DeviceNet Media Design Installation Guide - Manual (Page 34)

Publication DNET-UM072C-EN-P - July 2004
1-24 Get Started
Use this checklist when you install the DeviceNet network. You should complete
this checklist prior to applying power to your network.
Total device network current draw does not exceed power supply
current limit.
Common mode voltage drop does not exceed limit.
Number of DeviceNet nodes does not exceed 64 on one network.
The practical limit on DeviceNet nodes may be 61 devices since
you should allow one node each for the scanner, the computer
interface module, and an open node at node 63.*
No single drop over 6m (20 ft).
Cumulative drop line budget does not exceed network baud rate
limit.
Total network trunk length does not exceed the maximum
allowable per the network data rate.
One 121 Ω , 1%, 1/4W or larger terminating resistor is at each end
of the trunk line.
Ground at only one location, preferably in the center of the
network
• V- connector for flat media
• V- connector drain and shield for round media
All connections are inspected for loose wires or coupling nuts.
No opens or shorts.
Proper terminating resistors.
Use the
Checklist
5