Chapter 9: Maintenance and Options
88 Alpha 600sc User’s Guide
The pin description for the serial port on the cash register is shown below.
Pin number
Pin No. I/O Signal Name Abbreviation
1NC
2 IN Receive Data RXD
3 OUT Transmit Data TXD
4NC
5 N/A Signal Grand SG
6NC
7 OUT (Request to send) RTS
8 IN (Clear to send) CTS
9 OUT(+5V) Power supply for BCR +5V
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