Cable Wiring For Serial Port In Automatic Rs-422 Selection Mode; Transceiver Connector Pin Numbers - 3Com CS/2500 Installation Manual

A-4 A A: P
PPENDIX
Transceiver
Connector
A
IN SSIGNMENTS
DCE
CS/2500 Pin
13
14
16
19
22
25
Figure A-3 Cable Wiring for Serial Port in Automatic RS-422 Selection Mode
Figure A-4 shows pin numbering for the transceiver connector.
Table A-2 lists pin assignments for this connector.
1 2 3 4
• • • • • • • •
• • • • • • •
9 10 11 12
Figure A-4 Transceiver Connector Pin Numbers
Table A-2 Transceiver Connector Pin Assignments
Pin Function
1 Control In Shield
2 Collision Presence (+)
3 Transmit (+)
4 * Receive Shield
5 Receive (+)
6 Power Return
7 Control Out (+) (unsupported) CO-A
*
8 Control Out Shield
9 Collision Presence (-)
10 Transmit (-)
(continued)
TXD+
TXD-
RXD-
RXD+
5 6 7 8
13 14 15
Circuit Use
CI-S Control In circuit shield
CI-A Control In circuit A
DO-A Data Out circuit A
DI-S Data In circuit shield
DI-A Data In circuit A
VC Voltage common
Control Out circuit A
CO-S Control Out circuit shield
CI-B Control In circuit B
DO-B Data Out circuit B