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5–16 Interfaces
Table 5–5. RS–232 Serial Interface Connector Pin Assignments
Input Signals Output Signals Miscellaneous
Signal Pin Signal Pin Signal Pin
Receive
Data (RD)
3 T
ransmit Data (TD)
2
Chassis Ground
1
Clear T
o Send (CTS)
5
Request T
o Send (R
TS) 4
Signal Ground
7
Data Set Ready (DSR)
6
Data T
erminal Ready (DTR)
20
Data Carrier Detect (DCD)
8
Received Data (RD) — Serial data stream to the printer.
Transmitted Data (TD) — Serial data stream from the printer for transmitting
status and control information to the host. Subject to protocol selection.
Request To Send (RTS) — Control signal from the printer. Subject to
configuration.
Clear To Send (CTS) — Status signal to the printer indicating the host is ready to
receive data/status signals from the printer.
Data Set Ready (DSR) — Status signal to the printer indicating the host is in a
ready condition.
Data Carrier Detect (DCD) — Status signal to the printer. The ON condition is
required for the printer to receive data.
Data Terminal Ready (DTR) — Control signal from the printer. Subject to
configuration.