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The 2
nd
wire is the wakeup output. This offers the functionality for the keypad to set other
devices into sleep mode or to wake them up. As long as the keypad is woken up the output is
set to high. Once the device enters sleep-mode the output is turned off and set to open.
11-2 circuit diagram wake-up-out
In the following the voltage levels to enter sleep mode and to wake up the keypad are
explained.
Max. input current wakeup in
Ca. 8 mA (@ 32 V)
Max. output current wakeup out
200 mA
Voltage level low
< 30 % * T30
Voltage level high
> 70 % * T30