H3C PSR650-A, User Manual, Page: 5 / 13

1
Introduction
The PSR650-A is a built-in power module with AC input and DC
output while the PSR650-D is a built-in power module with DC input
and DC output. These two power module models can transfer the
input voltage into 12 V or 3.3 V needed by the device.
Table 1 Features of the PSR650-A and PSR650-D power
modules
Feature Description
Protection
functions
Support input under-voltage protection,
output over-voltage protection, short-circuit
protection, and overheat protection
Hot swap
support Support hot swap while the device is in
operation
1+1 hot backup
support
Support 1 + 1 hot backup and current sharing
CAUTION:
For a device that supports both AC and DC inputs, you can
choose either of the two types of power modules as needed, but
do not use different types of power modules in the same device.