User`s manual

5–9Interfaces
EIA–232D Serial Interface
The EIA–232D serial interface enables the printer to operate with bit serial
devices compatible with an EIA–232D controller. The interface circuit
characteristics are compatible with the Electronic Industry Association
Specification EIA–232D. Input serial data transfer rates of 150, 300, 600,
1200, 2400, 4800, 9600, or 19,200 baud are selectable at the control panel.
The input format consists of a single start bit, 7 or 8 data bits, and one or two
stop bits. The number of data bits is determined by printer configuration. The
data bits are interpreted with the least significant bit first. Parity checking is
determined by printer configuration options selected from the control panel.
The printer interface uses a first–in/first–out buffer. The asynchronous
interface accepts data as they are provided by the host. The length of the data
cable from the host computer to the printer must be no longer than 50 feet.
EIA–232D Interface Signals
The EIA–232D connector mounted on the printer is a 25–pin DB–25S type.
The mating connector is a DB–25P. Signal pin assignments are listed in
Table 5–3. EIA–232D compatible serial interface signals are defined as
follows:
Received Data – Serial data stream to the printer.
Transmitted Data – 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.
Carrier Detect (CD) – Status signal to the printer. The ON condition is
required for the printer to receive data. Available as a configuration setup
option.
Reverse Channel Send – Control signal from the printer. Subject to configu-
ration.