Installation
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11
Table 2-2 shows the pin assignments for Ports 1, 2, and 4. Port 1 supports remote keyboard attachment of PS/2-type personal
for information about the PS/2 keyboard interface.)
Serial ports are configured using the
SERIAL
for configuration information.
An optional dual-channel serial communications expansion card, PN 67604, is available. The serial expansion card provides
two additional serial ports, assigned as port numbers 7 and 8. One port on the serial expansion card supports four-wire RS-485
communications. Both ports on the expansion card can support RS-232 or 20mA connections.
Port 3 uses connector J1 to support USB, Ethernet, and fiber-optic interface cards.
Installation of option cards in connector J1 requires removal of the J1/J10 port selection jumper (see
).
Removing the jumper disables RS-232 communications through connector J10. For the USB interface card only,
connections for simultaneous RS-232 (configured as Port 3) and USB communications (Port 2) are provided on the
USB interface card.
See the communications interface card installation instructions for more information.
Connector
Pin
Signal
Port
J9
1
CLK
1
2
+5V
3
GND
4
DATA
J10
1
GND
2
2
RS-232 RxD
3
RS-232 TxD
4
RS-232 RTS
5
RS-232 CTS
6
GND
J11
1
GND
4
2
N/C
3
N/C
4
RS-485 A
5
RS-485 B
6
+20mA OUT
7
–20mA OUT
8
GND
9
RS-232 RxD
10
RS-232 TxD
Table 2-2. Serial Port Pin Assignments
Note
Summary of Contents for 820i
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