1. SCOPE
This specification applies to VFD module (Model No: 9MS09SS1) manufactured by SSOT (Shanghai Shuyi Opto
Electronics Technology).
2. FEATURES
* Simple connection to the host system data bus via two-wired serial interface.
* Since a DC/DC converter is used, only +5VDC power source is required to operate the module.
* One chip controller offers integral 64×16 bit programmable logic array, low power consumption and high reliability in
services.
* 32 brightness levels can be selected by brightness control command.
* High quality blue-green(505 nm) vacuum fluorescent display provides an attractive and readable medium. Other colors
can be achieved by simple wavelength filters.
* Characters are provided in an attractive 14-segment starburst format.
3. PRECAUTIONS (OPERATING RECOMMENDATIONS)
* Avoid applying excessive shock or vibration beyond the specification for the VFD module.
* Since VFD is made of glass material, careful handling is required. i.e. Direct impact with hard material to the glass
surface(especially exhaust tip) may crack the glass.
* When mounting the VFD module to your system, leave a slight gap between the VFD glass and your front panel. The
module should be mounted without stress to avoid flexing of the PCB.
* Avoid plugging or unplugging the interface connection with the power on, otherwise it may cause the severe damage to
input circuitry.
* Exceeding any of maximum ratings may cause the permanent damage.
* Since the VFD modules contain high voltage source, careful handling is required during powered on.
* When the power is turned off, the capacitor does not discharge immediately. The high voltage applied to the VFD must
not contact to the ICs. In other words, the compulsory short-circuit of mounted components on PCB within 30 seconds
after power-off may cause damage to the module.
* Sending any input signals to the VFD module during power-off condition may cause I/O port damage in VFD circuitry.
* The power supply must be capable of providing at least 5 times the rated current, because the inrush current maybe 5
times the specified current consumption when the power is turned on.
* Avoid using the module where excessive noise interference is expected. Noise may affects the interface signal and causes
improper operation. And it is important to keep the length of the interface cable less than 15 meters (50 feet).
* Since all VFD modules contain C-MOS ICs, anti-static handling procedures are always required.