AAEON PFM-C42C - Manual (Page 13)

P C / 1 0 4 P e r i p h e r a l M o d u l e P F M - C 4 2 C
PFM-C42C Quick Installation Guide 1-13
1.5 List of Jumpers
The board has a number of jumpers that allow you to configure your
system to suit your application. The table below shows the function
of each of the board's jumpers:
Label Function
JP1 (8-port only) COM5 Ring/+5V/+12V Selection
JP2 (4/8-port) COM1 Ring/+5V/+12V Selection
JP3 (8-port only) COM6 Ring/+5V/+12V Selection
JP4 (4/8-port) COM2 Ring/+5V/+12V Selection
S1 (4/8-port) COM1 & 2 RS232/422/485 Selection
S2 (8-port only) COM5 & 6 RS232/422/485 Selection