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
