美国科动2003年起进入中国市场,在中国设有独资工厂,产品性能优异,价格公道,大家不妨考虑对比一下.
http://www.erk-elec.com/devicenet_extender.html 可实现将CAN/DeviceNET网络延长至6.7km.
www.erk-elec.com 0512-66094006,sales@erk-elec.com
Features
Extends the length of DeviceNet? networks up to 6 km
Fully DeviceNet compliant
Fiber optic or coaxial cabling
Star, bus or distributed-star topology
Variable data rates up to 500 kbps
Low-voltage AC- or DC-powered
Panel-mount or DIN-rail mount
Product Overview
The EXTEND-A-BUS Series can extend DeviceNet up to six kilometers—linking individual DeviceNet subnets together into a single larger network.
Each EXTEND-A-BUS unit creates a DeviceNet subnet and at least two units are needed to link subnets together. The data rate on each subnet can differ from those of other subnets. DeviceNet identifiers or MAC IDs cannot be duplicated on any of the subnets. Each EXTEND-A-BUS pair is best viewed as an extension cord. A unit does not consume a permanent MAC ID, therefore it is transparent to the network.
The backbone side of the EXTEND-A-BUS must adhere to standard ARCNET? cabling rules. Companion AI ARCNET active hubs are available for extending the backbone cabling. Hubs are cascaded to achieve the maximum distance: up to 6 km when using coaxial cabling and ten active hubs or up to 4.8 km when using a fiber optic backbone and two active hubs.
EXTEND-A-BUS Series
Model Description
EB/DNET-CXB EXTEND-A-BUS for DeviceNet with coaxial bus backbone
EB/DNET-FOG EXTEND-A-BUS for DeviceNet with fiber optic backbone
