NCR 7772 Series, User Manual

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Hardware Installation 2-25
DB-9 Serial
The Retail I/O Board provides one full RS-232 serial port through a DB-9 connector. The
port has a shunt to select b12V (default), +5V, or normal RI functionality.
Maximum power capability is 1A from this port. The power output from this port is
protected by a self-healing fuse.
Pin Signal Name
1 DCD
2 DSR
3 RXD
4 RTS
5 TXD
6 CTS
7 DTR
8 GND
9 RI
RJ12 Serial
The Hospitality I/O Board provides a quad-package RJ12 serial port. The RJ12 port is an
unshielded 6-pin. The color of the connector is black.
Pin Signal Name
1 RTS
2 GND
3 TX
4 RX
5 GND
6 CTS