User`s manual

Chapter 2 Hardware Configuration
PMB-1751LF USER'S MANUAL
Page: 2-11
2-7. COM3 & COM4 RI & VOLTAGE SELECTION
JP1: COM3 & COM4 RI & Voltage Selection
The selections are as follows:
COM PORT SELECTION
JUMPER
SETTINGS
JUMPER
ILLUSTRATION
RI 7-9
9
10
1
2
JP1
5V 1-3
9
10
1
2
JP1
COM3
12V 3-5
9
10
1
2
JP1
*** Manufactory default -- RI.