Matrix Orbital GLK19264A-7T-1U - Manual (Page 11)

6 Command Summary
2.4 RS422 Module
The GLK19264A-7T-1U-422 provides an industrial alternative to the standard RS232 communication
protocol. Rather than single receive and transmit lines, the RS422 model uses a differential pair for the
receive and transmit signals to reduce degradation and increase transmission lengths. Power can be
transmitted at distance to a -VPT module or supplied from the immediate vicinity to a regular or –LV
unit. RS422 signals are available in a six pin connector as described in the RS422 Connections section.
RS422 Connections
The GLK19264A-7T-1U-422 provides a robust RS422 interface to the display line. For this interface, a
series of six wires are usually screwed into the RS422 terminal block provided. An alternate header is
also available to provide local power to a regular or –LV unit. To connect to your GLK19264A-7T-1U-422,
adhere to the steps laid out below.
1. Set the Protocol Select jumpers.

RS422: The GLK19264A-7T-1U-422 offers only RS422 protocol and does not require any jumper
changes.
2. Make the connections.
a. Screw one wire; sized 16 to 30 on the American Wire Gauge, into each of the six terminal block
positions. When local power is supplied, a floppy cable may link to the alternate power header.
b. Connect the Vcc wire to the positive terminal of your power supply and the GND terminal to
the negative or ground lead to provide appropriate power as per Voltage Specifications.
c. Secure the A and B wires to your non-inverting and inverting output signals respectively, while
attaching the Z and Y wires to your inverting and non-inverting inputs.
3. Create.
a. In a PC environment, MOGD# or a terminal program will serve to get you started. In addition, a
variety of application notes are available online in a number of different languages to aid in the
development of a host controller. Instructions for these programs can be found below and the
simple C# example at
www.matrixorbital.ca/appnotes is a great first programming reference.