ICP DAS USA TDRS4050601 - Manual (Page 15)

Industrial Redundant Ring Switch – RS Series User Manual
TDRS4050601 7
It is likely that these people will not be fully trained on Ethernet and the protocols that are
in operation, nor will they fully understand the principles of SNMP etc. However, with a
fault contact, fault LED‟s and graphical interface implemented they have a multi-level
approach to fault finding:
The fault contact is hard-wired to an alarm on a control panel or as an input to a DCS. If a
link failure occurs (between two switches or an Ethernet Device) or a network failure
occurs the fault contact on the Switches will be energized. The Maintenance Engineer
can easily locate the fault.
With the increased use of Ethernet in the field to pass critical data the greater the
reliability in network infrastructure. Where multiple rings are configured in a system it is
also critical that the links between the rings are also duplicated to provide enhanced
redundancy. This can be achieved using Multi-ring Redundancy
Industrial Fiber Optic
Why Fiber Optics?
The utilization of fiber optic data transmission for industrial automation and process
control has become increasingly popular over the past decade.
A basic fiber optic system, using an optical transceiver circuit and fiber optic media, offers
a wide array of benefits that are not available with traditional copper conductors.
Advantages of Fiber Optic Data Transmission Technology
 High data rate and wide bandwidth
 Immunity to EMI/RFI and lightning damage
 No ground loops
 Low attenuation (data loss)
 Longer distance – up to 1.8 miles (3 km) with Muliti Mode fiber and over 15 miles
(25 km) with Single Mode fiber
 Small cable diameter fits almost anywhere - requires less duct space
 Light weight
 No sparks if cut – ideal for Hazardous Area applications
 No electric shock hazard
 Secure communications
 Flexible networking topologies
 Corrosion resistant
 Longer life expectancy than copper or coaxial cable
 Economical total system cost
Disadvantages of Electronic Cabling (Twisted Pair (TP), Coax, Twinax)
In selecting the signal/data transmission technology for your Industrial Automation and
Process Control networking, the following limitations of electronic cabling should be
considered:
 Cabling hassles: weight, routing, size, attenuation and cross-talk
 Distance between terminals and hosts is severely limited
 Large diameter cable fills plenums and conduits
 Needs to be routed away from power cabling
 Poor security
 Limited topologies