4
ABB Automation
1MRS 750109-MUM
Router Option Card for Lon
Star Coupler
RER 111
SROUT
1. Introduction
The router option card is designed to be used within the LON
Star Coupler RER
111. This device is not a "stand-alone" device.
The router option card connects two different communication channels and forwards
LonTalk
messages between them. One channel is the open collector bus of the
RER 111 unit, while the other can be a fibre-optic type or a transformer-isolated
twisted pair type channel with a speed of 78 kb/s or 1.25 Mb/s.
The router option card contains 9-pin D-type connector for the twisted pair interface
and a pair of fibre-optic transceivers.
Two types of transceiver pairs are available:
- ST-type glass fibre-optic transceiver
- snap-in-type plastic fibre-optic transceiver
The router option card can be used for improving network performance by dividing
a large communication network into smaller sub-groups of nodes, or it can be used
as media converter to twisted pair media.
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Fibre-optic connection
to bay level devices
MicroSCADA
Router option card
SROUT-C-
Devices with transformer isolated
TP transceivers (communication
speed 1.25 Mb/s or 78 kb/s)
Twisted pair
connection
Fibre-optic connection
SUBNET 1
SUBNET 2
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