VK202-25-VPT Matrix Orbital, VK202-25-VPT Datasheet - Page 19

• Manufacturer Part Number: VK202-25-VPT
• Description: VFD ALPHA/NUM DISPLAY 20X2
• Manufacturer: Matrix Orbital
• Series: VK202-25r

Specifications of VK202-25-VPT

• Outline L X W X H: 116.00mm x 37.00mm x 29.48mm
• Viewing Area: 89.75mm L x 11.50mm W
• Display Format: 20 x 2
• Display Type: Character
• Format: 5 x 7 Dots
• Voltage - Supply: 9 V ~ 35 V
• Character Size: 4.70mm H x 2.40mm W
• Interface: Serial
• Operating Temperature: -20°C ~ 70°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Dots: -

3 Troubleshooting
3.1 The display does not turn on when power is applied.
3.2 The display module is not communicating.
Matrix Orbital
First, you will want to make sure that you are using the correct power connector. Standard floppy drive
power cables from your PC power supply may fit on the Power/Data Connector however they do not
have the correct pin out as can be seen in figure 13 on page 7. Matrix Orbital supplies power cable
adapters for connecting to a PC, which can be found in the Accessories Section on page 2.
The next step is to check the power cable which you are using for continuity. If you don’t have an
ohm meter, try using a different power cable, if this does not help try using a different power supply.
The last step will be to check the Power / Data Connector on the VK202-25. If the Power / Data
Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital,
see 14.5 on page 54 for contact information.
First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com Port.
Second, please ensure that the display module is set to communicate on the protocol that you are
using, by checking the Protocol Select Jumpers. To change the protocol used by the display module
see Section 2.3 on page 11.
Third, ensure that the host system and display module are both communicating on the same baud rate.
The default baud rate for the display module is 19200 bps.
If you are communicating to the display via I
address. The default slave address for the display module is 0x50.
Figure 23: Keypad Interface Connector
VK202-25
2
C please ensure that the data is being sent to the correct
15