IBM LCD PC - Manual (Page 31)

I n d u s t r i a l P a n e l P C s O n y x - 1 5 8 / S
Onyx-158/S Series User Manual V1.2 31
RS-232/422/485 COM2 (JP4,JP5) Setting
PIN Function
1-2 RS-232 *
3-4 RS-422
5-6 RS-485
PIN Function
1-2, 4-5, 7-8, 10-11 RS-232 *
2-3, 5-6, 8-9, 11-12 RS-422
2-3, 5-6, 8-9, 11-12 RS-485
*Default
Auto detect CPU Frequency (JP7/JP8)
JP7 JP8 Function
On On AUTO
System Frequency (JP9 & JP10)
JP9 JP10 Function
On On 66MHz
Off On 100MHz
Off Off 133MHz or AUTO