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P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
3-77
Boards for HiPath 3000
Central Boards
Switches and indicators
● LED, green: +5-V output voltage is available.
● LED, yellow: –48-V output voltage is supplied by the external EPSU2-R power supply.
● Slide switch for setting the ring frequency:
– 25 Hz (Germany + international market)
– 20 Hz (U.S.)
– 50 Hz (France)
● Slide switch for activating and deactivating the battery voltage (batteries):
– up = off, battery voltage deactivated (battery backup off)
– down = on, battery voltage activated (battery backup on)
7
Caution
System voltage can only be switched on or off by plugging in or out the power plug.
If using an uninterruptible power supply, switch off the battery voltage first.
Figure 3-31 UPSC-DR - Switches and LEDs
Slide switch for activating and deac-
tivating the battery voltage (batter-
ies)
LED, green: +5-V output voltage is
available
Slide switch for setting the ring fre-
quency
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