VK204-25-422 Matrix Orbital, VK204-25-422 Datasheet - Page 11

• Manufacturer Part Number: VK204-25-422
• Description: VF CHARACTER DISPLAY 20X4 RS422
• Manufacturer: Matrix Orbital
• Series: VK204-25r

Specifications of VK204-25-422

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

RS422 Module
The LVK204-25-422 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 each of 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 -V unit.
RS422 signals are available in a six pin connector as described in the RS422 Connections section.
RS422 Connections
The LVK204-25-422 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 -V unit. To connect to your LVK204-25-422, follow the
steps below.
1. Set the Protocol Select Jumpers.
2. Make the connections.
3. Create.
11

a.
b.
c.

RS422: The LVK204-25-422 offers only RS422 protocol and does not require any jumper
changes.
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.
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 in Table 40.
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.
In a PC environment, uProject or hyperterminal will serve to get you started. In addition, a
variety of application notes are also available in a number of different languages to aid in
development. Instructions for the former can be found below and the simple C# example at
www.matrixorbital.ca/appnotes
Figure 8: RS422 Connections
is a great first reference for the latter.
#
1
2
3
4
5
Alternate Power
Dallas One-Wire
Header
Table 3: Standard Headers
Keypad
RS422
GPO
Temperature Probe
16-30 AWG Wire
None Offered
KPP4x4
Mate
PCS