Connecting An External Device - Citizen CT-S801 Mode D'emploi

3.4 Connecting an External Device

1. Turn off the power.
2. Remove the protective seal from
the external device connecter.
3. Confirm the orientation of the
external device cable connecter
and connect it to the external
device connecter at the back of the
printer.
CAUTION
Use only the specified external device cable to connect to the external device connector
(do not use phone, LAN, or USB cables).
(1) Connector pin configuration
No. Signal I/O
1 FG —
2 RXD Input
3 TXD Output Data sent to printer
4 DTR Output Indicates that the external device can
5 DSR Input
6 SG —
7 PS —
8 PG —
Transmission to external devices done at 19200 bps, 8-bit, no parity.
Function
Frame ground
Data received from external device
receive.
MARK: External device cannot receive
SPACE: External device can receive
Indicates that the printer can receive
data.
MARK: Printer cannot receive
SPACE: Printer can receive
Signal ground (common ground on
circuits)
Power supply terminal (24 VDC)
Flyback line for power supply
External device cable
connector
— 24 —
External device
connector
Protective
seal
Connector used: RJ-45
Applicable connector:
RJ-45