Serial Communication - Extech Instruments APEX 2 User Manual

3.3 Serial Communication


The RS232C Interface signals for the APEX 2 Series printers are terminated on a 6 PIN
RJ type data connector located on the side of the printer.

Six connections are provided from the Serial Interface to the host computer.
below, lists the Serial Interface signals and pin outs on the RJ connector. The
connector pin locations are shown in Figure 11.

A minimum of two pin connections are required for operation, RXD – pin 3 and
Common – pin 1.

Dip Switch #1 and #2 must be in the <OFF> position to activate the serial
communication interface
Note: The communication parameters: Baud rate, Data Bit and Parity settings must match those
of the host device. Dip switch #1 must be in the OFF position.
APEX2 User's Guide
FIGURE 11: RJ DATA CONNECTOR
Table 3 – APEX 2 Serial RS232C Interface signals
Rev 1.0
Table 3,
16