User's Manual

905U-K.MAN Rev. 1.1 January 2002
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ELPRO Technologies Pty Ltd Page 19
3.1 How to mount the 905U-K
The 905U-K module is housed in an IP66 weatherproof aluminium enclosure. To mount the
905U-K, remove the four screws in the top plate, and carefully remove the cover. The two
mounting holes should now be visible.
It is important to effectively earth the unit to help prevent radio noise and static electricity
damage. The preferred method is to earth the module using the mounting screws to connect
to an earthed surface. If this is not possible, use an earth lug in the mounting screw
connection and secure the other end of the wire to a good earth.
3.2 Antenna Installation
The 905U-K module will operate reliably over large distances. The distance that may be
reliably achieved will vary with each application - depending on the type and location of
antennas, the degree of radio interference, and obstructions (such as hills or trees) to the radio
path. Where it is not possible to achieve reliable communications, a 905U module may be
used to receive the message and re-transmit it. This module is referred to as a repeater. This
module may also have input/output (I/O) signals connected to it and form part of the I/O
network.
905U-K