User Manual

IMPORTANT NOTE
You are advised to read these instructions carefully and completely before using this equipment
BUT
, if you really cannot wait, the Quick-Start Guide found at the end of this manual will give you
the basic do’s and don’ts...
OVERVIEW
Thank you for purchasing a ‘Maxi-MINDA’ RX-500 receiver which uses a low-power
microprocessor to offer the following options:
• A very secure Family Identity Code
• Very low stand-by power consumption by using battery economizer.
• Automatic battery back-up operation if external power source fails.
• Fully protected against inadvertent reversal of external D.C. supply.
• Programmable alarm signal - can repeat at regular intervals.
• Optional loud alarm (up to 1.5 watts) when using external power.
• Internal loudspeaker and jack socket for connection of an external alarm loudspeaker.
• Relay-switched contacts
or
open-drain FET output for external switching.
• 9 volt 200mA regulated D.C. output is available to power other equipment (only when receiver is
using external power).
• Jamming alert - with programmable time delay.
• Lost signal alert - with programmable time delay and repeat option.
• Battery monitoring of transmitters that are using the same Family Code.
• Serial programming interface to a PC (additional items required)
CAUTION
A ‘Maxi-MINDA’ receiver will only respond to signals from those transmitters sending the same
Family Identity Code as the one that it has been pre-programmed to accept. This minimizes the
risk of interference between similar systems that happen to be operating within radio range of one
another.
It is
absolutely vital
therefore, to ensure that all transmitter and receiver units that have to
operate together are programmed correctly with the same Family Identity Code. Any signals
received from an ‘alien’ transmitter operating within range will not be decoded and, instead,
treated by the receiver as radio interference on the channel.
BATTERY INSTALLATION
The ‘Maxi-MINDA’ receiver requires a 9-volt MN1604 alkaline battery which is fitted into the
removable cassette accessible from the rear panel. This battery supply is automatically
disconnected whenever external power of adequate voltage and correct polarity is applied
through the rear connector.
BATTERY ECONOMIZER
The battery economizer operates by switching the receiver on for a very brief period, looking for a
signal and if nothing is found, switching it off again. If a signal is found to be present, the receiver
then ‘locks-on’ for long enough to process and display any alarm signal that may have been
received.
If the single green LED above the ‘On/Off’ switch regularly flashes, this indicates that the battery
economizer circuit is in operation - if it illuminates steadily then the economizer has been over-
ridden. While the receiver is in the pulsing ‘standby’ mode, it is in fact, switched on for less than
two percent of the time, thereby dramatically extending the RX-500's operating endurance when
using the internal battery supply.
The slight penalty for using the battery economizer is that any incoming alarm transmission must
last long enough to catch the receiver during one of its ‘on’ periods and ensure that it is