User's Manual

Depending on the power supply, the number of installed CHUs and, if applicable, a
redundantly implemented power supply, up to two Power Supply Modules (PSM) are
installed.
The Power Supply Module (PSM) is a rectifier module and is used with V
AC
power supply.
The PSM is used for converting AC voltage (V
AC
) into DC voltage (V
DC
).
The following table describes the recommended number of PSMs depending on the
power supply and the number of installed CHUs per equipment or compact rack. The
number is higher if redundant PSMs are used (maximum 4 per equipment or compact
rack).
Recommended number of PSMs (per equipment or compact rack)
Power supply Number of CHUs Number of PSMs
90 V
AC
- 185 V
AC
(nominal) 1 to 2 2
3 to 4 4
185 V
AC
- 250 V
AC
(nominal) 1 to 2 1
3 to 4 2
The following figure shows the front view of the PSU. The following table describes it in
detail.
Figure 13: PSU (front view)
Legend: PSU (front view)
No. Component Description
1 Mounting frame The mounting frame is used for accommodating the Power
Supply Modules (PSM)
2 Power Supply
Module (PSM)
Number depending on the V
AC
voltage at the site and the
number of installed CHUs, refer to Ä Table “Recommended
number of PSMs (per equipment or compact rack)” on
page 39
The following figure shows the front view of a PSM. The following table describes it in
detail.
Product description
Components > VAC power supply
DIB-R5 flexibleTx
39Operation Manual 90DIBR5flexibleTxOM02 - 1.2