RW-337D Service Manual I Page 4 of 61
3 Main Control Board Description
RW-337D can be connected to another device with USB, serial, parallel, Ethernet or WIFI interface.
3.1 USB interface
3.1.1 Parameter
➢
Data transfer:
Supports USB1.1 Protocol
➢
Connector:
USB B type standard socket
3.1.2 Interface signal
The printer built-in USB interface supports USB1.1 protocol, of which the outlet is USB A type.
Interface
signal is defined as below:
3.1.3 USB interface connection
Host Printer
VBUS..................................…VBUS
DATA-
................................…DATA
-
DATA+................................... DATA+
GND .......................................GND
Caution:
The vertical USB interface cannot be used when set the receiving buffer to 40Bytes.
3.2 Serial interface
3.2.1 Parameter
➢
Data transmission: Asynchronous serial communicate
➢
Handshaking: DTR/DSR or XON/XOFF
➢
Voltage:
MARK = -3 to -15V: Logic "1"/ OFF
SPACE = +3 to +15V: Logic "0"/ ON
➢
Baud rate:
1200, 2400, 4800, 9600, 19200, 38400, 57600 bps
[bps: bits per second]
➢
Data bit:
7 bit or 8 bit
➢
Parity bits:
No
➢
Stop bit:
1 bit or 2 bit
➢
Connector:
D-SUB 25PIN hole socket
Caution:
Handshaking, baud rate, data bit and stop bit can be set by EEPROM and feed button.
Pin
Signal name
Function
1
VBUS
+5V
2
DATA-
Data-
3
DATA+
Data+
4
GND
Ground
