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2022/04/11
Page: 17
Configuration
Power
5.3
P
OWER
S
UPPLY
For regular operation, an external power supply must be connected. Powering the device through
micro-USB is not (!) sufficient.
5.3.1
Barrel Connector
Power supply at the “D
-
Sub” version is realized using a widely used barrel
connector:
The matching plug has the following dimensions
(which are widely used and very much a ‘standard’):
•
Diameter outside: 5.5 mm
•
Pin inside: 2.1 mm
•
Shaft of 9.5 mm
•
Polarity: middle pin is + voltage, outside is ground (-) voltage
•
Voltage: 6 to 32 V DC (recommendation: 9V or 12V)
5.4
RS232
I
NTERFACE
This is an industry standard RS232 connection.
5.4.1
Default RS232 settings
Those are the default settings:
Baudrate
9600
No of bits
8
Parity bits
none
Stop bits
1
Flow control
none