User`s manual

INSTALLATIONS
16
J2: P8 AT Power Connector
Pin #
Signal Name
1 N.C.
2 +5V
3 +2V
4 -12V
5 Ground
6 Ground
J3, J4: COM1, COM2 Serial Port
J3 and J4 both 10-pin headers, are the onboard serial port connectors of
the CPU card. The following table shows the pin assignments of these
connectors.
Pin #
Signal Name
RS-232 RS-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX- NC
5 GND GND GND
6 DSR RTS- NC
7 RTS RTS+ NC
8 CTS CTS+ NC
9 RI CTS- NC
J3
fixed as
RS-232
J4
Configurable
as RS-232/
RS-422/485
with jumpers
JP1/JP2/JP3
10 NC NC NC