Citizen Systems ct-s851 Betriebsanweisung

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Use a serial interface cable with the connection layout shown below.
CAUTION
„ Always unplug the AC adapter from the printer before connecting the
printer to a Powered USB interface. Failure to do so may damage the host
PC. For information about installing a Powered USB interface, contact your
Citizen Systems dealer.
„ Check the orientation of the Powered USB cable connector before connecting it. Insert
it straight in so that the pins do not bend. Push it in until it clicks.
„ When disconnecting the cable, always hold the connector.
„ Be careful not to insert the USB interface cable into the cash drawer kick-out
connector.
„ To connect more than one printer to a single computer via a USB interface you must
change the serial number of the USB interface. 
CAUTION
Place the interface cable so people do not trip on it.
25-pin - 25-pin cable
PC
Printer
Signal
Pin
Pin
Signal
RXD 2
2
TXD
TXD
3
3
RXD
DTR
4
4
RTS
SG
5
6
DSR
DSR
6
7
SG
CTS
8
20
DTR
9-pin - 25-pin cable
PC
Printer
Signal
Pin
Pin
Signal
FG
1
1
FG
TXD
2
2
TXD
RXD 3
3
RXD
CTS
5
4
RTS
DSR
6
6
DSR
SG
7
7
SG
DTR
20
20
DTR