Com1/Com2/Com3/Com4 Pin 9 Output Type Setting (Jp5, Jp7, Jp6, Jp8); Table 4-6: Com1 / Com2 Pin 9 Output Type Setting (Ijp4) - Advantech POC-174 User Manual

4.4.2 COM1/COM2/COM3/COM4 pin 9 output type
setting (JP5, JP7, JP6, JP8)

Table 4-6: COM1 / COM2 pin 9 output type setting (IJP4)

RI (COM1,2) (default)
* default setting
Note:
42 POC-174 User's Manual
Pins 1 and 2 are for COM1.
Pins 3 and 4 are for COM2.
+5V 0.25A (COM1,2)