Specifications

8 Communication Choices
1785-SO036C-EN-P - April 2002
DeviceNet Network A DeviceNet network is an open, I/O communication link that
provides connections between simple, industrial devices (such as
sensors and actuators) and high-level devices (such as controllers).
Based on standard Controller Area Network (CAN) technology, this
open network offers a level of interoperability between like devices
from multiple vendors. A DeviceNet network reduces:
• installation costs
• start-up and commissioning time
• system and machine down time
A DeviceNet network provides:
At the device layer, a DeviceNet network can connect low-level
devices directly to plant-floor controllers without the need to
interface them through I/O modules.
DeviceNet specifications
For more information, see the DeviceNet Selection Guide, publication
DNET-SG001 and the DeviceNet Scanner Launch, publication
1771-LM001A.
Communication Choices
Features:
• device layer
• open standard
• directly connects low-level devices
Feature: Benefit:
interoperability simple devices from multiple vendors that meet DeviceNet standards are
interchangeable, giving you flexibility and choice
common network an open network provides common, end-user solutions, and reduces the need to
support a wide variety of device networks
lower maintenance costs you can remove and replace devices without disrupting other devices
cost-effective wiring one wire supplies communications and 24V power
networked device installation is more cost-effective than traditional I/O wiring
41394
Logix5550 controller with
1756-DNB module
DeviceNet
drive
motor
starter
input/output
devices
other
devices
laptop
sensor
indicator
lights
pushbutton
cluster
bar code
scanner
PLC-5 controller with
1771-SDN scanner module
Data transmission rate: Cable trunk length: Cumulative
drop length:
Maximum
drop length:
Maximum number
of nodes:
125k bit/s 500m (1,640 ft.) 125m (512 ft.)
6 m (20 ft.) 64250k bit/s 250m (820 ft.) 78m (256 ft.)
500k bit/s 100m (328 ft.) 39m (128 ft.)