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Cooper Bussmann BU-905U-L Wireless I/O Installation Manual
Testing Your Units
We recommend you bench test the complete system before installing a new system.
Configuration problems are easier to identify and fix when the units are next to each other.
The following table describes common problems and recommended solutions:
If your installation has …
You should check …
Cooper Bussmann recommends …
Poor radio channel
• The antenna installation.
• Higher performance antennas if the path is too long.
communications
• For radio interference on the same channel.
• Higher mounting points to overcome obstructions.
• TX LED flashes but no RX LED
• The radio path is adequate.
• Using an intermediate unit as a repeater.
• Output LEDs flash quickly
Red OK LED
• Power Supply voltage
• Supply should be between 9 and 30Vdc.
• Analog loop supply current
• The analog loop supply is rated for 35mA max.
• Module configuration
• Your module configuration may be invalid. Re-load
or restore factory default configuration.
TX LED flashes but no RX LED
• Ensure the BU-905U-L-R is set to the same
• Register the receiver with the transmitter.
(bench testing)
country and frequency band as the
(Refer to the Quick Start Guide)
BU-905U-L-T
RX LED Flashes but no
• For a user-defined customized configuration,
• Check the configuration and reprogram
outputs change
- check the configuration.
the modules.
• For default configuration, check the receiver is • Repeat the procedure to register the
registered with the transmitter.
receiver with the transmitter.
For support for other testing issues, please contact Cooper Bussmann.
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3A1580Rev1.7
