Specifications

EtherNet/IP ControlNet DeviceNet
Max. Segment Length 10,000 m 1 km (coax), 3 km (fiber) 100 m, 250 m 500 m
Max. Length Unlimited 30 km (coax, fiber, or both) 4 km (with repeaters)
Max. Nodes 1024 99 64
Rates 10 Mb, 100 Mb 5 Mbps 125, 250, or 500 kbps
Media Coax, twisted pair, fiber, wireless Coax, fiber 2 twisted-shielded pair, flat
Redundant Media Yes Yes No
Power to Devices From separate source From separate source 24V dc / 8 Amps
Standard IEEE 802.3 IEC 61158 IEC 62026
CENELEC EN50170 CENELEC EN 50325
Organization ControlNet International & ControlNet International Open DeviceNet Vendors Assoc.
Open DeviceNet Vendors Assoc.
Universal Remote I/O Data Highway Plus DH-485
Max. Segment Length 100 ft
Max. Length 10,000 ft 10,000 ft 4,000 ft
Max. Nodes 1 scanner; 32 nodes 64 32
Rates 57.6, 115.2, or 230.4 kbps 57.6 or 230.4 kbps 19.2 kbps
token passing token passing
Media Shielded twinaxial cable Shielded twinaxial cable Belden 3106A
Redundant Media No No No
Power to Devices From separate source From separate source From separate source
Universal Remote I/O
The Remote I/O link connects PLC and SLC processors to
remote I/O chassis and a host of intelligent devices such as
operator interfaces and ac/dc drives. Up to 32 I/O chassis
and other devices can be mounted up to 10,000 feet from the
PLC or SLC processor. PLC or SLC processors access the
Remote I/O link through either built-in scanners or scanner
modules. I/O products communicate with these scanners over
the link through separate adapter modules, or built-in
adapters.
Data Highway Plus
The Data Highway Plus network is a local area network
designed to support remote programming for factory-floor
applications. It permits plant-wide and cell-level data sharing
with program maintenance. Up to 64 nodes are supported per
network link, although 15 or fewer nodes are recommended.
DH-485
DH-485 is a local area network (LAN) designed for factory-
floor applications. DH-485 lets you connect up to 32 devices,
including SLC and MicroLogix controllers, HMI color graphic
systems, and personal computers. Up to 32 nodes are
supported.
DF1
DF1 is a proprietary Allen-Bradley master/slave protocol used
to transport data over a serial data communications RS-232,
RS-422, and RS-485 interface. DF1 is used for applications
requiring messaging to and from Allen-Bradley controllers and
other equipment.
Profibus DP
Profibus DP is a non-Rockwell Automation network that uses
the polling principle for high-speed ( up to 1.5 Mbaud ) data
transmission to Siemens and other controllers supporting the
Profibus DP protocol. It is a remote I/O protocol consisting
of a DP Master(s) and DP slave(s).
Modbus
Modbus is a non-Rockwell Automation control architecture
utilizing a half-duplex, master/slave communications protocol
for Modicon and GE controllers.
NetLinx Open Architecture
Established Networks
Rockwell Automation is committed to delivering plant-wide communication as cost-
effectively as possible. Whether you are integrating into an existing architecture or
building a new system, Rockwell Automation can enhance your control solution.
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The VIEW
Communication Networks