Exicom Limited EX7100-1 Benutzerhandbuch
EX7100 Technical Manual - Module Descriptions
©1999 Exicom Technologies (1996) Ltd
7-3
Issue 3 - May 2001
Figure 7.3: UHF EX7100 Terminal with Bottom Cover Removed
7.2
Power Supply Module Type 2964
7.2.1 General
The Power Supply module (PSU) converts the incoming DC input from the rear panel to
the voltages needed to operate the circuitry within the EX7100 terminal.
the voltages needed to operate the circuitry within the EX7100 terminal.
There are two variants of the Power Supply
:
>
10.8 VDC - 30 VDC Input
>
30 VDC - 60 VDC Input
The incoming supply may be positive earth, negative earth or floating (with no earth
connection).
connection).
Refer to Figure 7.4. The first stage of the power supply is an isolated “forward” converter.
This converts the incoming DC voltage to +24 volts, negative earth. The +24 volt supply is
used as required within the EX7100 terminal and is used to supply a second stage “fly-
back” converter that provides ±5 and ±15 volt outputs.
This converts the incoming DC voltage to +24 volts, negative earth. The +24 volt supply is
used as required within the EX7100 terminal and is used to supply a second stage “fly-
back” converter that provides ±5 and ±15 volt outputs.
1
Refer to Section 2, page 2-6 for IMPORTANT WARNINGS re the power supply
PA Type 8048
Transmitter Type
8053
Receiver Type
8054
Receiver Front-
End Type 8055
Power Supply Type
2964
PSU Measurement
Board Type 2998
Transmitter CPU
Type 8044