NCI 122X, User Manual, Page: 22 / 40

The rest are not used.
Serial Interface V Serial Interface V
Serial Interface V Serial Interface V
Serial Interface Voltage L oltage L
oltage L oltage L
oltage Levels evels
evels evels
evels
Received data:
Mark = OFF = Logic “1” = -25V to -3V
Space = ON = Logic “0” = +25V to +3V
Clear to send:
Busy = OFF = Logic “1” = -9V
Not Busy = ON = Logic “0” = +9V
Transmitted data:
Mark = OFF = Logic “1” = -9V
Space = ON = Logic “0” = +9V
Model 1220 (2600) Model 1220 (2600) Model 1220 (2600) Model 1220 (2600) Model 1220 (2600)
RS RS RS RS RS-232 Serial V -232 Serial V -232 Serial V -232 Serial V -232 Serial Version ersion ersion ersion ersion
17 17 17 17 17
Pin No. Pin No. Pin No. Pin No. Pin No. Signal Signal Signal Signal Signal DTE Direction DTE Direction DTE Direction DTE Direction DTE Direction Description Description Description Description Description
1 Chassis ground _ Cable shield
2 (RD) Received data To printer Printer data input line
5 (CTS) Clear to send From printer Signal (equivalent to
BUSY) indicating that
printer is ready for
operation and can
receive data.
7 (SG) Signal _ Signal Ground