Citizen CT-S851 III

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Data can be exchanged by serial communication.
Connecting the Interface Cable
1. Turn off the power.
2. Orient the cable correctly and insert it into the connector.
3. Insert the other connector firmly into the interface port of the host computer.
Use a serial interface cable with the connection layout shown below.
3.2 Serial Interface Board
CAUTION
 When disconnecting the cable, always hold the connector.
 Place the interface cable so people do not trip on it.
 Do not connect multiple interfaces at the same time.
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