B. INTEGRAL PARTS AND FUNCTIONALITY
B-8
BeFREE 20 – TECHNICAL OVERVIEW
Pin #
Signal
1
A– (GND)
2
A+ (RxD)
3
B+ (TxD)
4
B– (GND)
Figure B.6 Digital Inputs Connector
Port Internal circuitry
Suggested external circuitry
A
B
Figure B.7 Applying Digital Inputs
These inputs have an alternative function (direct access to the Tipro controller from an
external computer via serial RS232 port, as per Figure B.6) which is intended for
installation and maintenance purposes. More details can be found in the Chapter C.1 as
well as in the Reference [10].
