105U-G Wireless Gateway
User Manual
Page
3
©
August 2003
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 licence-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.
1.
For 105G modules, a radio licence is not required in most countries, provided the
module is installed using the aerial and equipment configuration described in the 105U
Installation Guide.
Check with your local 105G distributor for further information on
regulations.
2.
For 105G 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
105U 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.
3.
To avoid the risk of electrocution, the aerial, aerial cable, serial cables and all
terminals of the 105G module should be electrically protected. To provide maximum
surge and lightning protection, the module should be connected to a suitable earth and
the aerial, aerial 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 105U 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 105G module is not suitable for use in explosive environments without additional
protection.
