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Appendices ~ Appendix B: Pinouts
Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
Appendix B: Pinouts
RS-232 COM DCE port pinout (female)
Pin Number Control Pin Number Control
1 DCD 6 DSR
2 TXD 7 CTS
3 RXD 8 RTS
4 DTR 9 No connection
5 Ground
1
5
6
9
Figure B.1. RS-232 connector
PC
XAP 400
DB-9
Male
DB-9
Female
TXD (Pin 2)
RXD (Pin 3)
DTR (Pin 4)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
TXD (Pin 2)
RXD (Pin 3)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
Pin 6
Pin 9
Pin 4
Pin 1
Pin 9
Pin 6
Pin 1
XAP 400
Modem
Pin 3
Pin 2
Pin 3
Pin 7
DB-9
Male
DB-25
Female
Pin 5
Pin 2
AMX
XAP 400
TXD (Pin 2)
RXD (Pin 3)
GND (Pin 5)
RX2 (White)
TX2 (Red)
GND (Black)
DB-9
Female
Phoenix
Connectors
CTS (Pin 7)
RTS (Pin 8)
RTS2 (Green)
CTS2 (Blue)
AMX
Modem
DB-25
Female
DB-9
Male
TXD (Pin 2)
RXD (Pin 3)
GND (Pin 5)
CTS (Pin 7)
RTS (Pin 8)
DTR (Pin 4)
TXD (Pin 2)
RXD (Pin 3)
RTS (Pin 7)
GND (Pin 6)
RTS (Pin 20)
CTS (Pin 4)
GND (Pin 5)
Figure B.2. XAP 400 to PC RS-232 connections
Figure B.3. XAP 400 to Modem RS-232 Connections
Figure B.5. Modem to AMX RS-232 Connections
Figure B.4. XAP 400 to AMX RS-232 Connections
ClearOne recommends that
all nine pins be connected to
avoid communication errors.
!