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unknown connector
In use by the following Casio models: TE-100 TE-2000 TK-T200 TE-2200 TE-2400 TK-3200 TE-3000S TE-4000F TE-7000S TE-8000F QT-6000 and many other past models such as: CE-300, CE-4000, TK-800 and QT-2000.
Device 1
Pin Number
Device 1
Pin Name
Direction Device 2
Pin Number
Device 2
Pin Name



-- 2 RD
2 RX/RXD -- 3 SD
7,8 RS/RTS, CS/CTS  LOOP    
    LOOP 7,8 RS, CS 
8 CS/CTS -- 1 CD
1 CD/DCD -- 8 CS
4 ER/DTR -- 6 DR
6 DR/ DSR -- 4 ER
5 GND -- 5 GND





Source link also describes pinout from 9 pin D-SUB at cash register to 25 pin D-SUB at computer.

According to 2 reports in our database (2 positive and 0 negative) the Casio cash registers RS232 PC link cable (PRL-CB-2 cable) pinout should be correct.

Is this pinout
Casio cash registers RS232 PC link cable (PRL-CB-2 cable) visual pinout:click to enlarge
Source(s) of this and additional information: Casio Europe ( Page 10.
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