Printer User Manual

Page 22
3.1.5 MSP SERIES - OPTIONAL RJ11 - RS232C CONNECTOR
The table below lists the Serial Interface signals and pinouts for the Extech MSP
printer series with RJ11 type space saving data connector.
The six (6) pin RJ11 data connector is located at the left side of the printer adjacent to
power input connector. The pin # 1 is on the left side of the connector.
Five connections are provided from the Serial Interface to the host computer for proper
operation of this option. A minimum of two connections are required for operation,
RXD-pin3 and Common-pin1 or pin5.
MSP RJ11 CONNECTOR
PIN #
FUNCTIONAL
DESCRIPTION
SIGNAL
NAME
1 and 5 Logic common COM
2 RS232 serial output
From Printer to Host
TXD
3 RS232 serial input
From Host to Printer
RXD
4 Clear To Send output
From Printer to Host
CTS
6 Request To Send input
From Host to Printer
RTS
3.1.6 MSP SERIES - RS232C TECHNICAL SPECIFICATIONS
RS232C technical specifications are as follows:
DATA TRANSFER RATE: 1200 Through 9600 Baud
Dip switch select
WORD LENGTH: 1 Start bit
7 Or 8 Data bits
1 Or 2 Stops bits
SIGNAL LEVELS: Mark or Logical 1 = -3 to -15VDC
Space or Logical 0 = +3 to +15VDC
HANDSHAKING: RTS/CTS or XON/XOFF