AAEON ECB-902M - Manual (Page 21)

E T X C a r r i e r B o a r d E C B - 9 0 2 M
Chapter 1 Quick Installation Guide 1-21
23 GND 24 SELECT
25 GND 26 PRD1
27 GND 28 PRD2
29 GND 30 PRD3
31 GND 32 #ERROR
33 N.C. 34 PRD4
1.51 COM2 Connector (CN17)
RS-232 Mode
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RING/+5V/+12V 10 N.C.
RS-422 Mode
Pin Signal Pin Signal
1 TXD- 2 RXD+
3 TXD+ 4 RXD-
5 GND 6 N.C.
7 N.C. 8 N.C.
9 N.C. /+5V/+12V 10 N.C.
RS-485 Mode
Pin Signal Pin Signal
1 TXD- 2 N.C.
3 TXD+ 4 N.C.
5 GND 6 N.C.