GU256X128E-3900B Hardware Specification
- 10 -
Notice for the Cautious Handling of VFD Modules
Handling and Usage Precautions:
Please carefully follow the appropriate product application notes and operation standards for proper usage, safe handling, and
maximum performance.
[VFD tubes are made of glass]
The edges of the VFD glass envelope are not smooth, so it is necessary to handle carefully to avoid injuries to hands.
Use caution to avoid breaking the VFD glass envelope, to prevent injury from sharp glass particles.
The tip of the exhaust pipe is fragile so avoid shock from impact.
It is recommended to allow sufficient open space surrounding the exhaust pipe to avoid possible damage.
Please design the PCB for the VFD module within 0.3 mm warping tolerance to avoid any forces that may damage the
display due to PCB distortion causing a breakdown of the electrical circuit leading to VFD failure.
[High voltage]
Avoid touching conductive electrical parts, because the VFD module uses high voltage exceeding 30 – 100 volts.
Even when electric power is turned off, it may take more than one minute for the electrical current to discharge.
[Cable connection]
Do not unplug the power and/or data cables of VFD modules during operation, because unrecoverable damage may
result.
Sending input signals to the VFD module when not powered can cause I/O port damage.
It is recommended to use a 30cm or shorter signal cable to prevent functional failures.
[Electrostatic charge]
VFD modules need electrostatic-free packaging and protection from electrostatic charges during handling and usage.
[Structure]
During operation, VFD and VFD modules generate heat. Please consider sufficient heat radiation dissipation using heat
sink solutions.
Preferably, use UL-grade materials or components in conjunction with VFD modules.
Warp and twist movement causes stress and may break VFDs and VFD modules. Please adhere to allowances within
0.3mm at the point of attachment.
[Power]
Apply regulated power to the VFD module within specified voltages to protect from failures.
VFD modules may draw in-rush current exceeding twice the typical current at power-on, so a power supply with sufficient
capacity and quick starting of the power regulator is recommended.
VFD module needs a specified voltage at the point of connection. Please use an adequate power cable to avoid a
decrease in voltage. As a safety measure, a fuse or other over-current protection is recommended.
[Operating consideration]
Illuminating phosphor will decrease in brightness during extended operation. If a fixed pattern illuminates for an extended
period (several hours), the phosphor efficiency will decrease compared to the non-operating phosphor, causing
non-uniform brightness. Please consider programming the display patterns to use all phosphor segments evenly.
Scrolling may be a consideration for a period of time to refresh the phosphor condition and improve even illumination of
the pixels.
A signal cable 30cm or less is recommended to avoid possible disturbances to the signal.
[Storage and operating environment]
Please use VFD modules under the recommended specified environmental conditions. Salty, sulfuric and dusty
environments may damage the VFD module even during storage.
[Disposal]
VFD uses lead-containing materials (RoHS directive exempts these lead compounds in the glass for electronic devices).
When discarding VFDs or VFD modules, please adhere to applicable laws and regulations.
[Other cautions]
Although the VFD module is designed to be protected from electrical noise, please plan your circuitry to exclude as much
noise as possible.
Do not reconstruct or repair the VFD module without our authorization. We cannot assure the quality or reliability of
unauthorized reconstructed VFD modules.
Notice:
We do not authorize the use of any patents that may be inherent in these specifications.
Neither whole nor partial copying of these specifications is permitted without our approval. If necessary, please ask for
assistance from our sales consultant.
This product is not designed for military, aerospace, medical or other life-critical applications. If you choose to use this
product for these applications, please ask us for prior consultation or we cannot accept responsibility for problems that
may occur.
MBBZ-009-S18A
