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Battery-free modem cuts costly downtime

A Jekyll Electronic Technology product story
Edited by the Engineeringtalk editorial team Sep 26, 2005

A new version of the Telemodem2 telemetry system is helping ERH Communications count traffic in the wilds of Wales.

Thanks to the engineering expertise at Jekyll Electronic Technology, a new version of the Telemodem2 telemetry system is helping ERH Communications count traffic in the wilds of Wales.

ERH Communications provides regional maintenance for all the communications and signalling equipment in Wales under contract for the Welsh Assembly.

One of the company's tasks is to maintain the 350 traffic counting sites that are situated by roadsides throughout the country and to provide the Assembly with the appropriate figures.

Engineers at ERH need this information daily so traffic management methods can be put in place, if necessary.

Each roadside cabinet is equipped with a modem that is used to communicate sampled data.

With many of the sites in rural and remote locations these modems until now have been battery powered.

However, engineers at ERH were unhappy with the performance as they were having problems with moisture ingress and battery reliability, so approached Jekyll for a more robust, battery-free modem to overcome the high maintenance and costly downtime.

The Jekyll Telemodem2 was the ideal candidate.

Not all modems are suitable for the outdoor environment where they are exposed to changing environmental conditions.

Adapting the Telemodem2 to operate under such circumstances required the unit to be more robust in its overall design.

As a result, Jekyll has launched a weatherproof version of its Telemodem2 range.

This has benefited ERH by reducing the number of field failures, due to moisture ingress and corrosion and this improved design increases product reliability and data integrity.

One of the main advantages of the Telemodem2 is that it uses zero power technology.

This allows the modem to be powered directly from the telephone line, rather than batteries or mains power.

No extra telephone lines are needed, which reduces costs further still, and this technology is highly suited for use with low power, battery powered and even solar power monitoring equipment.

Jekyll recommended the Telemodem2 Freedom but has extended this feature across its range of devices, allowing customers the option to locate the modem outdoors.

Small enough to fit inside a meter, monitor or data logger, Jekyll's Telemodem 2 range begins with the Standard for low power entry level needs, followed by the line powered Freedom version for true remote monitoring.

Key features include data transfer rates up to 2400bit/s, remote diagnostics for online set up, industry standard 25 way D-type data port connections, flexible interfacing, a choice of mounting options and CTR21 compliance for use throughout Europe.

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