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B-9
Pin Name Operation
3 Receive Data Input: Connect to transmit data pin of
connected device.
2 Transmit Data Output: Connect to receive data pin of
connected device.
6 Data Terminal
Ready (DTR)
Output: When you use a modem, connect
to modem DTR pin.
When using Intermec Standard Protocol,
this pin indicates that the printer is
switched on.
When using XON/XOFF or hardware
flow control, this pin indicates the printer
mechanical status and the status of the
printer input buffer.
5 Ground To enable communications, connect to
signal ground of connected device.
Completes circuit for all RS-232 signals.
7 Clear to Send (CTS) Input: When you use a modem, connect to
modem CTS pin. The modem must set
CTS true before the printer transmits data.
If not connected, CTS sets itself true.
8 Request to Send
(RTS)
Output: When you use a modem, connect
to modem RTS pin. The modem sets RTS
to true before transmission. The printer
sets RTS to false after transmission.
9 Printer Status Output: When not using software flow
control (XON/XOFF), connect to input of
connected device (for example, CTS).
Indicates printer mechanical status and
status of printer input buffer.