VXC-112(i)(A)U/142(i)AU/182i(A)U/114(iA)U/144(i)U, VEX-114(i)/144(i) , VEX-112(i)/142(i) User’s Manual (Ver. 1.5
Aug.10 2012) -----5
Self-Tuner:
The VXC/VEX card is equipped with a “Self-Tuner” chip to control the sending/receiving
direction of RS-485 ports automatically.
Without the help of Self-Tuner, users need to enable RS-485 transmitter before sending,
and disable the transmitter after finishing sending. The timing to enable and disable transmitter
(direction control) is the major issue on many communication problems, and it is very difficult to
debug.
The built-in Self-Tuner on VXC/VEX cards effectively gets rid of this direction control issue
and also simplifies software programming for communication applications.
Isolation:
Some VXC/VEX cards offer photo isolation to protect your computer and equipment against
damages in harsh environment.
Photo coupler is a device that uses a short optical
transmission path to transfer a signal between elements of a
circuit, typically a transmitter and a receiver. This keeping them
electrically isolated — since the signal goes from an electrical
signal to an optical signal, the electrical contact along the path is
broken.
It can help cutting down on ground loops, common mode
voltages and block voltage spikes, provide electrical isolation, and
offer significant protection from serious over-voltage conditions in one circuit affecting the other.
Short Card Design
:
The “Short Card” design is suitable for compact-sized computer, especially for IPC (Industrial
Personal Computer) and servers.
Universal PCI (3.3 V and 5 V):
The Universal PCI card works with both new 3.3 V PCI bus that has been widely-used in
servers, and traditional 5 V PCI bus. The universal PCI interface will be the standard for every
card from ICP DAS in the near future.
