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Serial (RS-232) Connector
Pin No. Description
1 Not used
2 RXD (receive data) input to the printer
3 TXD (transmit data) output from the printer
4
DTR (data terminal ready) output from the printer -- controls when the
host may send data
5 Chassis ground
6 DSR (data set ready) input to the printer
7
RTS (request to send) output from the printer -- always in the ACTIVE
condition when the printer is turned on
8 Not Used
9 +5 V @ 0.75 A fused
The maximum current available through the serial and/or parallel port is not
to exceed a total of 0.75 Amps.
When XON/XOFF handshaking is selected, data flow is controlled by the
ASCII control codes DC1 (XON) and DC3 (XOFF). The DTR control lead
will have no effect.
Interconnecting to DTE Devices —The printer is configured as data
terminal equipment (DTE). To connect the printer to other DTE devices
(such as the serial port of a personal computer), use an RS-232 null modem
(crossover) cable.
Interconnecting to DCE Devices —When the printer is connected via its
RS-232 interface to data communication equipment (DCE) such as a
modem, a STANDARD RS-232 (straight-through) interface cable must be
used.
74 980476-001A