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2.1.3.
The Power Supply and Serial Interface
The interface connector allows for:
For testing purposes, Adcon supplies a 220VAC power
adapter that provides also an RS-485 to RS-232 conversion. Thus, the unit can be
connected to a serial port of a PC and can be switched in various operating modes.
A list of commands is given in the sub chapter "Controlling the Unit" on page 50.
2.1.4.
External Power Supply
In order to test the unit over the specified supply range, a special power cable is sup-
plied by Adcon Telemetry. This cable must be connected to the interface connector
of the unit before the serial cable (see Figure 3). The two wires with banana plugs
may then be connected to an external variable power supply: the red plug to plus
and the black plug to minus.
WARNING! Do not apply more than 10 Volts to the unit: permanent damage of the
device may result.
Figure 3.
2.2.
Specifications
The A440 fulfills the specifications of the EN 300 220-1, Class 12, and ETS 300 113,
as well as the FCC Part 90.214 (Subpart J) of the CFR 47.
• External supply (any DC source from 5.6 to 10
volts)
• Communication over serial lines, at 19200 baud
(RS-485).
ANT
INTERF
A440
Connection of an external power supply.
The Power Supply and Serial Interface
Gnd
B
To Interface Unit
Red
+
5.6 to 10 Volt
Black
-
1
2
V+
3
4
A
13
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