FOUR CHANNEL LOW POWER RADIO TRANSMISSION SET
WITH PROGRAMMABLE LOGIC AND HIGH SECURITY CODE RP501
A set consists of four-channel radio transmitter and dedicated receiver designed for use in radio remote control
and anti-burglar alarm systems. Both the transmitter (encoder) and the receiver (decoder) use microprocessor
controlled input/output logic and 64-bit coding technology. The system operates on SAW controlled 433,92 MHz
frequency and features up to 500 metres operating range in open field (with standard 20cm transmitter wire aerial).
Range up to 1000 metres in open field can be obtained with simple dipole TV UHF band (ch 21-60) directional
aerial and coaxial cable fixed to the receiver's pcb in place of the standard wire aerial. One receiver may operate
with many transmitters in a system.
The units are in same look like ABS plastic enclosures with different colour led indicators. The transmitter (red
led indicator) may be powered either from line 12VDC supply or, due to extremely low power requirements, from
internal 9V battery. The receiver's bicolour led indicator operates from line 12VDC supply and has four indepen-
dent relay outputs. The receiver has four fully programmable NO/NC relay outputs connecting to the receiver's
ground. The relay action is time-lapse mode depending on user's programming. The S output (open collector type) is
for external beeper device and delivers pulses on alarm state. The S output might also be user set to indicate the
radio link between transmitter and receiver failure. This is done by disconnecting jumper J5 on receiver’s board.
The receiver features built in bicolour led that provides necessary programming and output status indication. The
transmitter’s tamper switch, which is connected in series with D4 input, is user activated by cutting jumper ZT and
closing input D4 to the receiver's ground. It generates alarm transmission in channel 4 on opening of RP501 box.
Modes of operation of the RP501:
Mode 1. Continuous operation.
Opening any of the transmitter's D1..D4 inputs
generates lasting 15 seconds transmission that switches to 1 second transmissions every 1
minute interval if any of the inputs remain still opened. Transmission ends when all inputs
of the transmitter are closed. Receiver resets outputs after passing user-programmed time.
Mode 2. Prolonged transmission operation.
Transmission is prolonged of up to 15 or
40 seconds*, even if any of D1..D4 inputs are opened for a very short while. If the opened
any D input lasts over the set prolonged transmission period, the transmitter auto-switches
to battery saving mode of 1 second transmission every 1 minute stop time.
Mode 3.
Radio relay operation.
Any change on the D1..D4 inputs generates
transmission lasting 15 or 40* seconds with the receiver outputs status corresponding to
the status of the D inputs of the transmitter.
Mode 4. Radio relay operation with cyclic update.
Same as mode 3 above with the
addition of 1 second lasting update transmission every 80 seconds.
In all the above modes of operation the transmitter's battery voltage is tested. It's drop to
7V is indicated by the receiver's green led blinking.
Additionally, operation of the set in any of the above modes may be performed with
radio link testing
. Every 35 seconds transmitter sends a test signal. In case the receiver does
not get any test signal within 90 second time span it indicates that condition by blinking red
LED and delivering pulses (or continuous state if J5 is opened in receiver) to ground on S output. This
function is user set by disconnecting jumper (5-6). Only one transmitter may operate with radio link testing
in a system.
*
40 seconds with jumper 7-8 shorted, 15 seconds with jumper 7-8 opened.
Important!
To ensure proper operation of the set in above selected modes it is necessary to perform instruction 3 of the
programming procedures below.
RP501 PROGRAMMING PROCEDURES
Prior to programming make sure the receiver's LED lights green, otherwise shortly disconnect the power supply.
1. Programming - learning transmitter(s) to receiver's memory:
a) press receiver's
PRG
switch (LED lights red) for less than 3 seconds. Releasing the switch LED continues to light red
indicating entering the programming mode of the decoder,
b) disconnect one of D inputs of the transmitter once, blinking receiver's LED confirm end of the procedure and the
transmitter is receiver's memory.
2. Programming - setting the receiver to time-lapse output mode and reset time:
a) press receiver's
PRG
switch (LED lights red) for more than 3 and less than 8 seconds. Releasing the switch LED light
changes to green indicating entering this programming mode,
b) press shortly PRG switch again to start time-lapse count. Receiver's LED lights red.
c) when desired time has lapsed (up to 6 hours) press the PRG switch shortly again. The receiver's LED changes to green
and after 2 seconds starts blinking confirming end of the procedure.
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