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| 型号： | 02-ATB-1200 |
| 英文描述： | RS232 INTERFACE PCB FOR |
| 中文描述： | RS232接口电路板的 |
| 文件页数： | 12/15页 |
| 文件大小： | 1095K |
| 代理商： | 02-ATB-1200 |
ATB1200 User Guide Page 6 of 15
3.4
J2 PINOUTS (RS-232 HOST COMMUNICATION CONNECTOR)
The 6-way data connector has the following pinouts:
Pin
Name
Function
Pin 1
SGND
Signal Ground (Common with Power Ground)
Pin 2
RXD
Receive (RS 232)
Pin 3
BUSY
Busy (RS 232)
Pin 4
TXD
Transmit (RS 232)
Pin 5
N/C
Reserved for +5 V Logic Input (Do Not Connect)
Pin 6
RESET
Reset Input
Pin 5: The standard ATB1200 derives its internal controller logic supply from the Vmech DC Power In
(on J1) via an on-board low dropout regulator. As an option the ATB1200 may be provided without
this component fitted. In this case the +5V +/- 5% supply for the controller logic should be supplied to
pin 5 of J2. Please contact the factory for more details on this option.
Pin 6: An external reset input is provided. This should be left unconnected or linked directly to SGND
if it not used. To reset the printer, this signal should be taken to between +2V and +25V.
3.5
HOST COMMUNICATION DATA FORMAT
The default serial interface format is RS-232, 9,600 baud, 8 data bits, 1 or 2 stop bits, and no parity.
Other formats can be programmed into the ATB1200 at the factory or by the host.
Serial data is expected on RxD in RS-232C format with -12V meaning 'mark' or logical '1', and +12V
meaning ‘space’ or logical '0', with reference to the common ground. The serial data output line, TxD,
transmits XON/XOFF to the host at the same baud rate and format as the serial data input. The
hardware busy line, Busy, is true (nominally -12V) when busy.
Some host equipment use a constant space condition (+12V) to indicate a reset condition or wait
state. Some battery powered host equipment present the same output signal when they go to sleep.
By default the ATB1200 will not ignore this condition. It will print a series of question-mark characters
(‘?’) to indicate a data problem. This behaviour can be modified so that the printer ignores the
condition. See the Programmers Guide for details.
As an option, the ATB1200 may be supplied with TTL interface. Please contact the factory for details.
3.6
SUGGESTED CONNECTIONS TO A PC
To operate from a PC the ATB1200 should be connected to a serial COM port on the PC. Suggested
connections to a 9-Pin COM port are shown below:
ATB1200
J2 Pin
ATB1200
Signal
PC
D-9 Pin
PC Signal
Name
Function
(refers to PC)
2
RXD
3
TXD
Transmit Output (RS 232)
4
TXD
2
RXD
Receive Input (RS 232)
1
SGND
5
SGND
Signal Ground
3
BUSY
6 & 8
DSR & CTS
Busy Input (RS 232)
Other pins are unconnected
It is strongly recommended that a screened data cable be used, with its braided screen connected to
the system ground.
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