
Title
Rev.
Page
HP-283 Technical Manual
Ver1.01
P.19
3-2) Interface
3-2-1) RS-232C
1) Data transmission : Serial
2) Hand shake : Hardware (RTS/CTS or DTR/DSR )
Software (XON/XOFF)
3) Baud rate : 9600, 19200, 38400, 115200 bps
4) Data bit length : 7, 8 bits
5) Parity
: None, Odd, Even
6) Stop bits
: 1 or 2
7) Connector : DSUB-25(Female)
8) Pin
No
Signal
In / Out
Remark
1
FG
-
Frame Ground
2
TxD
OUT
Transmit Data
3
RxD
IN
Receive Data
4
RTS
OUT
Printer Busy( the same with DTR)
5
CTS
IN
Host Busy
7
GND
-
Signal Ground
20
DTR
OUT
Printer Busy
22
Power
OUT
*1) +5Volt or +3.3Volt
6,8-19,21,23-25 N.C
-
None Connection
*1)Option : JP1 short : P5 Volts
JP2 short : P3.3 Volts
Notice
: Do NOT short JP1 and JP2 at the same time.
9) Connection Example
: It
‟s connected inside the printer.
Host (PC)
Pin Signal
2
RxD
3
TxD
8
CTS
7
RTS
5
GND
6
DSR
Printer
Pin Signal
2
TxD
3
RxD
4
RTS
5
CTS
7
GND
20
DTR