Wiren Board 5: RS-232 Extension Module

Hardware

RS-232 Extansion Module

The module is based on the MAX202 chip and provides a +/- 10V signal levels.

Pinout

RS-232 signals goes to terminals extansion module O1-O3.

Pinout:

Terminal	Function
O1	RX
O2	TX
O3	GND

Operation

Port is available in the system as

• /dev/ttyAPP2 - when installed in first slot for expansion module (MOD1)
• /dev/ttyAPP3 - when installed in second slot for expansion module (MOD2)

For work you need to disable hardware flow control.