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INSTALLATIONS
CN1: PS/2 Keyboard and PS/2 Mouse Connectors
Keyboard
Signal
Pin # Mouse
Signal
Keyboard data 1 Mouse data
N.C. 2 N.C.
GND 3 GND
5V 4 5V
Keyboard clock 5 Mouse clock
N.C. 6 N.C.
Mouse (top)
Keyboard (bottom)
CN2, J2, J7, J8: COM1/2/3/4 Serial Ports
CN2 (COM1) is a DB-9 connector, while J2, J7 and J8 are a COM
pin-header connectors.
COM1 COM2
Signal Name Pin # Pin # Signal Name
DCD, Data carrier detect 1 6 DSR, Data set ready
RXD, Receive data 2 7 RTS, Request to send
TXD, Transmit data 3 8 CTS, Clear to send
DTR, Data terminal ready 4 9 RI, Ring indicator
GND, ground 5 10 Not Used
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
14 MB886 User’s Manual