Closed-Circuit Current Cutout

The switching controller (8)  , which supplies voltage to the Star Coupler and satellites, is switched off by the microprocessor (3)  in sleep mode via the signal SHDN1 (shut down) to reduce the current draw of the module to below 1mA.

In order to ensure the necessary basic functions occur also in sleep mode, a 9.8 V linear controller (1)  is switched in parallel to the switching controller and this is permanently in operation.

The wakeable S/E (transmitter/receiver) modules in the Star Coupler and a downstream 5 V linear controller (2)  are supplied with this voltage. This second linear controller supplies the microprocessor.

The satellites ( SZL, ZGM ) are connected to the wakeable S/E modules, and these satellites are able to wake up the byteflight.  The other S/E modules are supplied via the switch (9)  by the switching controller (8)  and are switched off in sleep mode.