Siemens HiPath 3000 Service Manual page 217

EPSU2 external power supply
The EPSU2 AC/DC converter is an external power supply unit for use when the UPSC-D is un-
able to provide sufficient power for the base stations and telephones at the HiPath 3550.
The external power supply EPSU2 comes in two versions:
S30122-K7221-X1 - This version is always supplied with four built-in batteries. These bat-
●
teries guarantee approx. 30 minutes of bridging time in the event of a power failure.
S30122-K7221-X2 - This version is supplied without batteries. To use this model's uninter-
●
ruptible power supply function, four batteries must be ordered separately and installed.
The new EPSU2 model S30122-K7221-X2 is designed to replace S30122-
>
K7221-X1.
Differences between the two models are indicated at the appropriate point in the
following description.
P31003-H3550-S403-4-7620, 02/05
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
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Boards for HiPath 3000
Peripheral Boards
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