2.0 HANDHELD TRANSCEIVER SHT12_LEFFER (also referred to as transmitter)
2.1 Normal Operation
Immediately after insertion of the batteries the transceiver is
In its normal operation mode (No push button may be pressed while
insertion of batteries).
Push button 3 „LOCK“ will start immediately the lock function at
receivers side.
The function unlock (push button 2) will only be started if before
push button 1 “ENABLE” is pressed twice within 0.5 seconds.
This enable function will be activ only within 2 seconds.
When the unlock function is started, the red LED (2)
will flash for each data transmission.
The state of each limit switch is displayed by the 6 blue
LEDs (1 to 6 ). If the unlock function at the receivers side is
completed (all limit switches are closed) then the red LED (2)
stops flashing and keeps on state within 10 seconds.
Then the transmitter goes into stand by mode without any display
or transmission.
The lock function is analogous to the unlock funtion.
The green LED (3) flashes after starting this function. The state of each limit switch is displayed by the 6 blue LEDs
and the green LED stops flashing if the lock function is completed.
If lock or unlock function is activated but not yet completed, both of them may be interrupted at any time by pressing
push button 4 “STOP”. This results in stopping all motor outputs at receivers side.
While the stop command is transmitted to the receiver the red and the green LED will flash as long as the signal is
transmitted correctly.
The yellow „LED transmitter“ keeps on state as long as the remote control is activated and the internal battery voltage
is ok. If this LED flashes, the batteries of the transceiver are empty and have to be replaced. If the batteries do not
assure proper function, the device will be switched off.
The yellow „LED receiver“ flashes in case of low battery state of the receivers side. This LED is off in normal operation.
If the radio communication has broken, the handheld transceiver tries automatically to re-establish the communication
within 10 seconds. Without successfully trials the command will be erased.
If a lock or unlock process is not terminated within a preprogrammed time the red and the green LED flashes
alternatively within 5 seconds. This malfunction also is signalised acoustically before the device goes off.