User's Manual

905U-K Radio Telemetry Module User Manual

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ELPRO Technologies Pty Ltd 2001 Page 4

Important Notice

ELPRO products are designed to be used in industrial environments, by experienced

industrial engineering personnel with adequate knowledge of safety design considerations.

ELPRO radio products are used on unprotected license-free radio bands with radio noise and

interference. The products are designed to operate in the presence of noise and interference,

however in an extreme case, radio noise and interference could cause product operation

delays or operation failure. Like all industrial electronic products, ELPRO products can fail

in a variety of modes due to misuse, age, or malfunction. We recommend that users and

designers design systems using design techniques intended to prevent personal injury or

damage during product operation, and provide failure tolerant systems to prevent personal

injury or damage in the event of product failure. Designers must warn users of the equipment

or systems if adequate protection against failure has not been included in the system design.

Designers must include this Important Notice in operating procedures and system manuals.

These products should not be used in non-industrial applications, or life-support systems,

without consulting ELPRO Technologies first.

For 905U modules, a radio licence is not required in many countries, provided the

module is installed using the antenna and equipment configuration complying with the

country’s regulations.

Check with your local distributor for further information on

regulations.

For 905U modules, operation is authorised by the radio frequency regulatory authority

in your country on a non-protection basis. Although all care is taken in the design of

these units, there is no responsibility taken for sources of external interference. The

905U intelligent communications protocol aims to correct communication errors due to

interference and to retransmit the required output conditions regularly. However some

delay in the operation of outputs may occur during periods of interference. Systems

should be designed to be tolerant of these delays.

To avoid the risk of electrocution, the antenna, antenna cable, serial cables and all

terminals of the 905U/105S module should be electrically protected. To provide

maximum surge and lightning protection, the module should be connected to a suitable

earth and the antenna, antenna cable, serial cables and the module should be installed

as recommended in the Installation Guide.

4. To avoid accidents during maintenance or adjustment of remotely controlled

equipment, all equipment should be first disconnected from the 905U/105S module

during these adjustments. Equipment should carry clear markings to indicate remote

or automatic operation. E.g. "This equipment is remotely controlled and may start

without warning. Isolate at the switchboard before attempting adjustments."

5. The 905U/105S module is not suitable for use in explosive environments without

additional protection.