Rockwell Automation DeviceNet Media Design Installation Guide - Manual (Page 17)

Publication DNET-UM072C-EN-P - July 2004
Get Started 1-7
Determine the maximum trunk line distance
The distance between any two points must not exceed the maximum cable
distance allowed for the data rate used.
TIP
Round cable (both thick and thin) contains five wires: One
twisted pair (red and black) for 24V dc power, one twisted
pair (blue and white) for signal, and a drain wire (bare).
Flat cable contains four wires: One pair (red and black) for
24V dc power; one pair (blue and white) for signal.
Drop cable for KwikLink is a 4-wire unshielded gray cable.
It is used only with KwikLink flat cable systems.
Data rate Maximum
distance
(flat cable) Maximum
distance
(thick cable) Maximum
distance
(thin cable)
125k bit/s 420m (1378 ft) 500m (1640 ft) 100m (328 ft)
250k bit/s 200m (656 ft) 250m (820 ft) 100m (328 ft)
500k bit/s 75m (246 ft) 100m (328 ft) 100m (328 ft)
Wire
Color Wire
Identity Usage
Round Usage
Flat
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
The maximum cable distance is not
necessarily the trunk length only. It is the
maximum distance between any two devices.