Motorola MTR2000 T5544 Instruction / Field Service Manual page 254

1
DESCRIPTION
The DLN6622 Power Supply Module is described in this section. This Power Supply is used on high power (i.e.,
>75 W) stations. A general description, identification of inputs and outputs, a functional block diagram, and func-
tional theory of operation are provided. The information provided is sufficient to give service personnel a func-
tional understanding of the module, allowing maintenance and troubleshooting to the module level. (Refer also
to the Maintenance and Troubleshooting section of this manual for detailed troubleshooting procedures for all
modules in the station.)
The DLN6622 Power Supply Module has built in power factor correction and includes a connection for battery
backup that also serves as the DC input when the supply is used in dc only input mode.
General Description
Note
Note
Motorola Inc., 2006
All Rights Reserved
Printed in U.S.A.
AC/DC POWER SUPPLY
(500 W, 50/60 Hz, 85 to 264 Vac Input
The DLN6622 Power Supply Module accepts an ac or a dc input (ac
input = 85 to 264 Vac, 50/60 Hz, dc input = 21.6 to 32 Vdc) and generates
three output dc voltages to power the station modules: +5.1 Vdc,
+14.2 Vdc, and +28.6 Vdc.
When used in dc input mode the 28.6 Vdc output is determined by the dc
input minus 0.5 Vdc.
The power supply is a high-frequency switched mode design, all con-
tained in a metal heat-sink, mounted on the left-hand side of the station.
The design provides for output over-voltage/over-current protection.
The ac input connection is made at the rear of the station via an IEC-type
connector keyed to accept only high temperature type mating connectors.
Also provided is a Battery Backup connection (see dc mode above). Power
supply cooling, when necessary, is provided by an external fan (located
near the middle of the heatsink) which provides forced air across the pow-
er supply heatsink fins.
An external battery charger system is required to support the battery
backup feature.
Government & Enterprise Mobility Solutions
1301 E. Algonquin Road, Schaumburg, IL 60196
MODULE
MODEL DLN6622
or 21.6 to 32 Vdc Input)
68P81011Y31-O
03/10/06-UP