11
JP8 (4-pin): COM3 Header Pin9 Function Select
JP8
→
COM3 Header
4-6 Close:
RI= +12V.
1
3
5
3-4 Close:
RI= +5V;
2-4 Close:
RI=RS232;
4
6
2
6
5
3
1
4
2
5
3
1
6
4
2
JP9 (4-pin): COM4 Header Pin9 Function Select
JP9
→
COM4 Header
4-6 Close:
RI= +12V.
1
3
5
3-4 Close:
RI= +5V;
2-4 Close:
RI=RS232;
4
6
2
6
5
3
1
4
2
5
3
1
6
4
2
