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Serial (RS-232) Connector Technical
Information
NOTES: The maximum current available through the serial
and/or parallel port is not to exceed a total of 0.75 Amps.
When XON/XOFFhandshaking is selected, dataflow 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.
Figure31showstherequiredcableconnections.
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)interfacecablemustbeused.Figure32shows
the connections required for this cable.
45
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