Telpar, Inc. MTP Series Receipt Thermal Printer User Manual
2011 Telpar, Inc. (Rev.20110809)
Page 28
4.3 Serial (RS-232C) Interface
4.3.1
Serial (RS-232C) Interface Specification
Serial (RS-232C) Interface Specification
Item
Specification
Data receive speed
Baud rate selected at factory (written in flash). Default
baud rate is 115200 bps. Default Data Bits = 8,
default Stop Bits = 1, Default Parity = none
Synchronizing method
Asynchronous, Full duplex
Handshake
Hardware or XON/XOFF
Input output level
RS-232C
Signal level
Space (logic=0) +3 V
+12 V
Mark (logic=1) -3 V
-12 V
04.3.2 Serial I/O Connector
J9 Pin #
Function:
1
NA
2
DTR Data Terminal Ready, Output from printer)
3
TxD (Transmit Data, Output from printer)
4
CTS (Clear To Send, Input to Printer)
5
RxD (Receive Data, Input to Printer)
6
RTS (Request To Send, Output from Printer)
7
DSR (Data Set Ready, Input to Printer)
8
NA
9 & 10
Circuit Common
Location of J9, the
Serial Port RS-232
Connector, on the
Printer‟s main circuit
board.
Pins 1-9 (odds)
are bottom row, left to
right. Pins 2-8 (evens)
are top row, left to
right.
Pin 1
Pin 9
RS-232 Connector,
J9 Pinout
Mates with .1”X.1”
Socket Connector