![background image](http://html1.mh-extra.com/html/aaeon/ecb-915a/ecb-915a_quick-installation-manual_3212455022.webp)
C O M E x p r e s s
E C B - 9 1 5 A
C a r r i e r B o a r d
Chapter 1 Quick Installation Guide
1-22
Chassis GND
H1 C-GND
H4
C-GND
H2 C-GND
H5
C-GND
H3 C-GND
1.38 COM3 Connector (CN25)
Pin Signal
Pin Signal
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI/12V/5V
10 NC
1.39 COM4 Connector (CN26)
Pin Signal
Pin Signal
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI/12V/5V
10 NC