GE LM10, Instruction Manual

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LM10 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL A–1
LM10 Motor Protection System
Appendix A
GE Consumer & Industrial
Multilin
A.1 DeviceNet Overview
A.1.1 Description
DeviceNet™ is an open low-cost digital, multi-drop network based on the reliable CAN
technology to interconnect industrial devices (such as limit switches, photoelectric
sensors, valve manifolds, motor starter, process sensors, panel displays, etc.) via a single
network. This eliminates expensive wiring and failure due to the increase of number of
connections. It also reduces the cost and time to install industrial automation devices while
providing reliable interchangeability of components from multiple vendors. The direct
connectivity provides improved communication between devices as well as important
device-level diagnostics not easily accessible or available through hard-wired input/output
interfaces.
DeviceNet systems can be configured to operate in a master-slave or a distributed control
architecture using peer-to-peer communication. DeviceNet systems offer a single point of
connection for configuration and control by supporting both input/output and explicit
messaging. DeviceNet also has the unique feature of having power on the network. This
allows devices with limited power requirements to be powered directly from the network,
reducing connection points and physical size.
DeviceNet permits the interchangeability of simple devices while making interconnectivity
for more complex devices possible. In addition to reading the state of discrete devices,
DeviceNet provides the capability of reading analog data such as temperatures, load
current or to count the number of items that have passed on a conveyor belt in the given
period.