ICP DAS USA TDRS4050601 - Manual (Page 14)

Industrial Redundant Ring Switch – RS Series User Manual
TDRS4050601 6
like spanning tree, and SNMP to help with fault finding and system analysis were often
employed to enhance network resilience. If a network failure occurred the IT department
would casually look at repairing the equipment; there was no real rush as it was an office
network.
However, with industrial Ethernet you need very fast repair time and with an IT
department not readily available on the roadside, maintenance personnel need to be
made aware of the fault, find the error and repair it - quickly. To aid this, unique network
recovery features are employed to significantly enhance network recovery times. When
an IT department requires a level of redundancy a common method is to employ the
spanning tree protocol. However, spanning tree can be complex to program and
critically can take over 30 seconds to detect and recover from the fault – far to long for
critical applications!
ICP DAS RS Series incorporate propriety protocols that enable multiple Switches to be
placed into a redundant ring. A single Switch, configured as the network focal point will
monitor, detect and recover from a fiber or copper link failure within approximately
50mS – for the majority of applications a seamless process. The configuration process
of the network focal point is simple as it must be remembered that as the switches are to
be installed on the roadside the first to be called to rectify a fault will more than likely be
Maintenance personnel.
Module
Feature
ICPDAS Ring Switch General Managed Switch
Communication Protocol
Modbus/TCP
Modbus/RTU
SNMP
IGMP
Managed Interface
Serial Console, Utility
DIP Jumpers
Rotary Jumper
Serial Console
Utility
Web
telnet
Service
N/A QoS, CoS, VPN, FTP, HTTP,
HTTPS, SSH, VLAN
Redundancy
Magic Ring
(Variable recovery time from 100
ms to 1.5s)
Trunking, Spanning Tree, Rapid
Spanning Tree
Amount of Rings 2 1
Single Coupling Yes No
Redundant Coupling Yes No
Router/IP sharing No Yes
IEEE standards
802.3
802.3x
802.3u
802.1D
802.3
802.3x
802.3u
802.1D/w
802.1p
802.1Q
Alarm
Relay Output
Modbus
SNMP
Convenience Easy to use/configure N/A