DPSI LR Description Version 1.1
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Handling:
Mechanical switches contain the risk of failure. In order to rule out any possible mechanical influence,
the DPSI LR (S) uses a self-holding electronic switch, which is activated just by an electrical pulse. For
the DPSI LR you use a gold-plated 2 mm plug pin to generate this pulse. Putting it into the ON socket
(red) turns the DPSI LR on; putting it into the OFF socket (black) turns it off. Many tests provided that
the pin could not be lost due to vibrations. Even if the pin should get lost, the DPSI LR remains switched
on (in switched on mode). If the ribbon cable gets damaged or is being removed, the DPSI LR stays on
in switched on mode, as well!
The DPSI LR can only be switched off if the pin plug is plugged into the off socket. The contact pin
should always remain plugged in the corresponding socket (ON or OFF)! If the pin should get lost, a
2 mm wire or a 2 mm screw can be used; simply plug it into the respective socket.
The ON/OFF switch can be placed wherever desired (e.g. on a fuselage side wall). The connection
cable with plug is plugged into the respective multiple plug of the DPSI LR until it locks into place on
impact. In the event that replacement or removal is necessary, the plug can be disengaged from the
multiple plugs by carefully pulling it out parallel (take hold of the cable directly at the plug).
In the DPSI LR S, the pulse to turn on the device is being generated by the built-in ON push button. If
you press this button momentarily, the DPSI LR S is turned on. The LED between both push buttons is
steady on (respectively in "parallel" to the buzzer). You turn off the DPSI LR S by pressing the OFF
button for at least 2 seconds. Due to the built-in time delay it is impossible to turn off the DPSI LR S by
short loose contacts. Here too, maximum safety is guaranteed.
The central, ultra-bright light-emitting diode (LED) in the switch (respectively on the printed circuit board
of the DPSI LR S) always illuminates when the DPSI LR S is switched on (pin plug in the red ON
socket). In case of low voltage, the LED blinks in sync with the buzzer.
A commercial battery controller (monitor) can be plugged directly to the backside of the switch (at "B1"
or "B2"). This enables additional optical voltage monitoring of the battery. When using this type of
battery controller, you must ensure that the required number of cells is correctly set.
If the pin plug is plugged into the black (OFF) socket, the entire receiver station is switched off (any
battery controllers that may be connected as well). In switched-off position, the batteries will not
discharge. The minimum "no-signal current" of the DPSI LR (S) is far below the self-discharge of the
connected batteries. Theoretically, it would take 274 years for the "no-signal current" to discharge a
battery with 2.4 Ah.
When turning the DPSI LR (S) on, you hear a buzzing signal (1 to 5 beeps, dependent on the
programmed battery type). After shipping, the DPSI LR (S) is programmed for LONGGO batteries
(LiPo). Therefore, the buzzer sounds 4 times! Programming is possible to adjust the thresholds
for the low voltage detection of different battery types.
