Triner Scale MP-20 - Manual (Page 9)

5. SERIAL INTERFACE
5.1 Specifications
1) Synchronization: Asynchronous
2) Baud rate: Fixed at 9,600 Baud / sec
3) Word configuration:
Start bits: 1
Data bits: 8 (no parity)
Stop bit: 1
4) Signal polarity RS-232C
* Mark = Logic “1” (-3 to –12V)
* Space = Logic “0” (+3 to +12V)
5) Handshaking control: None
5.2 Connector Pin Assignment
PIN No. PIN NAME FUNCTION
1
3
2
1
2
3
TXD
RXD
GND
Transmitted data
Received data
Signal ground
Note: 1. Signals for RS-232C are based on EIA RS-232C level.
Applicable connector (Mini-DIN connector)
Printer: Female
Cable: Male
5.3 Description of Input / Output Signal
(1) I / O signals
1) TXD
Serial output data signal.
2) RXD
Serial input data signal. Data is ignored when command format error or overrun error has occurred.
3) GND
Common ground for the circuit.
(2) Data configuration
1) Start bit (1 bit)
2) Data bit (8 bits)
3) Stop bit (1 bit)
(3) Electrical characteristics
1) RS-232C circuit
Input (RXD)
MAX 232 equivalent
Mark = (-8V) : Stop bit
Space = (+8V) : Start bit
5-1