User's Manual

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

page 46 of 79

Second solution could be done using a MAXIM transceiver (MAX218)

In this case the

compliance with RS232 (+-5V) is possible.

Another level

adapting method could be done using a standard RS232 Transceiver

(MAX3237EAI) adding some resistors to adapt the levels on the

GL865 Input lines.

NOTE: In this case has to be taken in account the length of the

lines on the application to avoid problems in case of High-speed

rates on RS232.

The RS232 serial port lines are usually connected to a DB9

connector with the following layout:

9.3.