IBASE MB500 - Manual (Page 22)

INSTALLATIONS
J6, J7, J8: COM2, COM3, COM4 Serial Ports
Pin # Signal Name (RS-232)
1 DCD, Data carrier detect
2 RXD, Receive data
3 TXD, Transmit data
4 DTR, Data terminal ready
5 Ground
6
DSR, Data set ready
7 RTS, Request to send
8 CTS, Clear to send
9 RI, Ring indicator
10 No Connect.
COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX-
NC
5 Ground Ground Ground
6 DSR RTS-
NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
10 NC NC NC
J9: IrDA Connector
Pin # Signal Name
1 +5V
2 No
connect
3 Ir RX
4 Ground
5 Ir
TX
18 MB500 User’s Manual