Ring / Multidrop Fibre Converter RS-232



✔ Numerous fibre configuration options

• Up to 120 km distance
• BiDi support (single fibre)
• Multimode and singlemode SFPs

✔ Designed for use in Industrial applications

• Dual 10 V to 60 VDC power input
• 500,000h MTBF according to MIL HDBK-217K
• Compact housing with integral DIN rail clip

✔ Unique solutions for serial RS-232 protocols

• Data rates to 250 kbit/s and up to 12 data bits
• Dual channel for data or status
• Half- and full duplex bus mode (Y/V mode)

✔ Extensive resilient fibre optic network solutions

• Ring recovery < 1 ms
• Latency < 0.5 ms allowing 250 units per ring
• Galvanically isolated fault status output


The ODW-720-F2 has been designed to allow the use of fibre optic cables on RS-232 networks. The design allows the use of a range of Westermo verified SFP (Small Form Pluggable) transceivers which can provide solutions with, for example, only a single fibre or distances up to 120 km.

Both multidrop networks and redundant rings can be formed using a mixture of transceiver types.

This unit has been designed for industrial use where the requirement is for a long and reliable service life, in a harsh environment. To ensure this reliable operation we manufacture using the highest quality components.

The ODW-720 draws on Westermo’s many years of knowledge of serial protocols and can even transmit a second data channel if necessary.

Large ring networks can be created to provide network resilience to guarantee system functionality, even if a cable is damaged. The ring recovery time ensures that the network devices are not aware of the failure. The fault contact provides a method to communicate network failures.

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Technical Specifications

Ring / Multidrop Fibre Converter RS-232
1 xRS-232 port 300 bit/s – 250 kbit/s

Nuri Shakeer

International sales

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