INSTALLATIONS
16
IB780 User’s Manual
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 IB780. 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