Ring Topology Fibre Modems
WESTERMO ODW-622 RS232 MULTIDROP OR REDUNDANT RING FIBRE OPTIC MODEM

Introduction

RS-232 to Fibre Optic Modem

Features

The Westermo ODW-622 is a fibre optic modem that can be used to create either redundant ring or multidrop fibre optic solutions for devices with RS-232 interfaces.The ODW-622 is designed for harsh industrial usage as well as road or railway installations meeting industrial level EMC specifications and having a wide operating temperature range.The maximum distance of a fibre link depends on selected transceiver and fibre type.Fibre distances up to 80 km (50 miles) are possible on each leg of the ring meaning huge rings over 1000 km (621.4 miles) in circumference could be created.The unit has a retiming function that eliminates the problem of jitter and hence ensures reliable communications in all situations.The unit has LED indication to display fault conditions as well as relay contacts that can be connected to a PLC or similar device to allow network problems to be diagnosed at a central point.It is possible to mix ODW-622 with ODW-632 in a network and hence have both RS-232 and RS-422/485 devices in the same network.For a multidrop network it is possible to use the ODW-621 or ODW-631 as the endpoints.