Product category:
Plant- and Machine-Wide Communications
News Release from: RF DataTech | Subject: ZRT Series
Edited by the Engineeringtalk Editorial
Team on 09 January 2007
Radio modems add more interface options
RF DataTech has added RS422/RS485 and 5V TTL versions of its popular ZRT Series of low-cost radio modems.
RF DataTech has added RS422/RS485 and 5V TTL versions of its popular ZRT Series of low-cost radio modems These new versions complement the original RS232 versions and offer additional flexibility to designers of industrial wireless telemetry systems
This article was originally published on Engineeringtalk on 28 Apr 2004 at 8.00am (UK)
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Many of today's industrial telemetry and process control products use RS485 or RS422 serial interfaces for multidrop configurations and the introduction of the RS422/RS485 versions of the ZRT allows these units to be easily connected by radio without the need for external data conversion products.
The new 5V TTL version is particularly suited to direct integration into OEM products which already use these logic levels internally.
All the ZRT radio modem versions are fully compatible with each other and it is possible to mix and match the different data interfaces within a single system.
VHF, UHF and 869MHz versions are available and all models can operate at speeds up to 9600bit/s over air in a 12.5kHz channel.
A discrete component RF stage is used to give better performance than would be possible using the simpler "single chip" solutions found in many other low cost designs and careful attention to spurious response, adjacent channel and blocking performance, makes the product ideal for crowded telemetry radio channels.
The low power (10-750mW) versions comply with the European ETSI EN300-220 specification for unregulated/unlicensed applications, and the higher power (50mW-5W) versions comply with the more stringent EN300-113 requirements which generally apply to the licensed radio telemetry bands.
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