Marquette Hellige GmbH MicroSmart V 2.xx Page 11
Servicing Instructions 227 470 35 B - 97.12
3.3.1 Voltage supply and monitoring
On-Off electronics
Toggel-
function
ON/OFF
key
G_OFF
Uin Uout
Z502, Z503
T2
The unit is switched on and off via the ON/OFF key (on the membrane keypad). Enabling and
disabling operates via a toggle function: if the unit is switched off, press the ON/OFF key to switch
the unit on. If the unit is switched on, press the ON/OFF key to switch the unit off. The processor
can switch the unit off via the signal lead "G_OFF" if:
- the input voltage is too low (exhaustive discharge protection for the battery)
- the unit is not operated for any length of time (approx. 5 minutes)
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