IEI Integration NOVA-PV-D4251_D5251 v1.01 - Manual (Page 65)

NOVA-PV-D5251/D4251 5.25" SBC
Page 51
This connector provides RS-232 connections for four serial ports.
Figure 3-26: COM Connector Pinout Locations
Pin Description Pin Description
1 DATA CARRIER DETECT (DCD1#) 2 DATA SET READY (DSR1#)
3 RECEIVE DATA (RXD1) 4 REQUEST TO SEND (RTS1#)
5 TRANSMIT DATA (TXD1) 6 CLEAR TO SEND (CTS1#)
7 DATA TERMINAL READY (DTR1#) 8 RING INDICATOR (RI1#)
9 GND 10 GND
11 DATA CARRIER DETECT (DCD2#) 12 DATA SET READY (DSR2#)
13 RECEIVE DATA (RXD2) 14 REQUEST TO SEND (RTS2#)
15 TRANSMIT DATA (TXD2) 16 CLEAR TO SEND (CTS2#)
17 DATA TERMINAL READY (DTR2#) 18 RING INDICATOR (RI2#)
19 GND 20 GND
21 DATA CARRIER DETECT (DCD3#) 22 DATA SET READY (DSR3#)
23 RECEIVE DATA (RXD3) 24 REQUEST TO SEND (RTS3#)
25 TRANSMIT DATA (TXD3) 26 CLEAR TO SEND (CTS3#)
27 DATA TERMINAL READY (DTR3#) 28 RING INDICATOR (RI3#)
29 GND 30 GND
31 DATA CARRIER DETECT (DCD4#) 32 DATA SET READY (DSR4#)
33
RECEIVE DATA (RXD4) 34 REQUEST TO SEND (RTS4#)