DeviceNet Protocol
DeviceNet dramatically cuts installation costs by integrating up to 62 devices on a 4-wire trunk network. DeviceNet interfaces directly with many popular PCs and PLCs including Allen Bradley, GE Fanuc and others. The DeviceNet protocol is based on CAN (Controller Area Network) technology originally developed for automotive applications and extensively used throughout that industry.

DeviceNet enables you to directly attach simple discrete and complex analog devices. Power is carried over two wires with data on another bundled two wires making up the four wire bus. DeviceNet has been designed for, and proven in, mission critical applications such as anti-lock brakes and air bags. It also has high noise immunity, making it suitable for industrial and process environments.

System Benefits
  • Save over 30% on installation costs.
  • Power and communication supplied over 4-wire bus.
  • Install up to 62 devices on the same bus network.
  • Cycle count for automated valve and other diagnostics available.
  • Electronic Data Sheet provides for rapid commissioning of devices.
  • Auxiliary bus-powered 4 to 20 mA input attaches conventional analog devices for more wire savings.
  • Open/Closed sensor inputs and 2 power outputs available to handle all On/Off automated valve applications.
  • Hot insertion of devices may be done without dropping bus power (non-hazardous applications.)
Unit of Measure

Technical Data


N/A StoneL

VCT Specifications


N/A (2) Discrete Inputs
(Open & Closed)
(2)Power Outputs (Solenoids)
(1)4-20 mA Auxiliary Input, 8 Bit Resolution: No Additional Power Source Required

Baud Rates

N/A Software Selectable 125K, 250K or 500K baud


N/A Polling, Cyclic & Change of State


N/A Max. Current 160 mA. Both Outputs Combined (Current Limited to 250 mA)

Max. Power

N/A 4 Watts. Both Outputs Combined

Outputs. Voltage

N/A 24 VDC

Temperature Range

N/A -40° to 82°C (-40° to 180°F)

Devices per Network

N/A 62

Network Specifications


N/A Trunk line with drop and branch lines, trunk terminators required


N/A Two seperate shielded twisted pairs contained in one shielded cable

Data Delivery

N/A 8 bytes of data for I/O; can be unlimited if using fragmentation services

Cable Length

N/A 156m

Transmission Rate

N/A 125 kb/s
250 kb/s
500 kb/s

Communication Method

N/A Master/Slave, multi-master and peer-to-peer polling

Data Signal

N/A Non-return to zero with bit stuffing

Error Detection

N/A Automatic retransmission of cirrupted messages and auonomous switching off of defective nodes