User's Guide

5
2.2 Hardware Overview
UC501 UC502
Data Interface 1:
Pin
Description
1
5V/9V/12V(Switchable)
2
3.3V
3
GND
4
GPIO1
5
GPIO2
6
RS232/RS485(Switchable)
7
8
Reserved
Pin
RS232
RS485
6
TXD
A
7
RXD
B
Data Interface 2:
Pin
Description
1
5V/9V/12V(Switchable)
2
3.3V
3
GND
4
Analog Input 1
5
Analog Input 2
6
Reserved