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RS-232 Serial Interface
The RS-232 Serial interface enables the printer to operate with bit serial
devices compatible with an RS-232D controller. The interface circuit
characteristics are compatible with the Electronic Industry Association
Specification EIA-232-D.
Input serial data transfer rates of 150, 300, 600, 1200, 2400, 4800, 9600, and
19200 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 it is provided by the host. The length of the data
cable from the host computer to the printer must not exceed 50 feet
(15 meters).
Table 4–3. RS-232 Serial Interface Connector Pin Assignments
Input Signals
Signal
Receive Data (RD)
Clear To Send (CTS)
Data Set Ready (DSR)
Data Carrier Detect (DCD)
RS-232 Serial Interface Signals
The RS-232 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 4–3. RS-232 compatible serial interface signals are defined as follows:
Received Data — Serial data stream to the printer.
4–10
Output Signals
Pin
Signal
3
Transmit Data (TD)
5
Request To Send (RTS)
6
Reverse Channel (RC)
8
Data Terminal Ready (DTR) 20
Miscellaneous
Pin
Signal
2
Chassis Ground
4
Signal Ground
14
Printer Interfaces
Pin
1
7
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