Parallel (Centronics)
The most simple way to connect to other hosts(not PC compatible) or
terminals is:
The parallel port is a standard 36-pin Centronics. Its pin assignments are
listed as following.
Printer
Terminal/Host
Pin 2- RxData
………… TxData
Pin 3- TxData
………… RxData
Pin 5- Ground
………… Ground
Pin Direction Definition
Pin
Direction Definition
1
In
/STROBE
13
Out
SELECT
2
In
Data
1
14,15
NC
3
In
Data
2
16
-
Ground
4
In
Data
3
17
-
Ground
5
In
Data
4
18
NC
6
In
Data
5
19~30
-
Ground
7
In
Data
6
31
NC
8
In
Data
7
32
Out
/Fault
9
In
Data
8
33~36
-
NC
10
Out
/ACK
11
Out
BUSY
12
Out
PE
In general as long as the data quantity is not too large or you use
Xon/Xoff as flow control, there will be no problem at all.
Baud rate
: 2400, 4800, 9600, 19200 and 38400.
(set from bits 6 ~ 8 of DIP switch)
Data format
: always 8 data bits, 1 start bit and 1 stop bit.
Parity
: always non parity
Handshaking
: XON/XOFF as well as CTS/RTS (hardware flow control).
If you run an application with the bundled printer driver under Windows
and use the serial port, you should check the above parameters and set
the flow control to “Xon/Xoff” or “hardware”.
Auto Polling
Both the serial and parallel ports are active at the same time on this
printer, i.e. data can be received on either one, however no provision is
made for port contention. If data is transmitted to both ports
simultaneously, it will cause the data in the received buffer to be
corrupted.
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