The DNA-VR-608 is an 8-channel, variable reluctance sensor interface and frequency out board. Each channel provides a fully differential input and is capable of monitoring VR output levels as high as 250 Volts peak-to-peak and is fully isolated from the UEI chassis as well as other I/O boards installed in the chassis. The board is also an ideal solution as a general counter unrelated to variable reluctance sensors and can be used to measure an extremely wide variety of AC signals and speed sensor signals such as hall effect, magnetic pickups, and optical.The VR-608 provides a unique and powerful signal conditioner mode where the VR/Hall inputs are conditioned and made available as a TTL compatible digital outputs. The board supports a matrix configuration where any input can be directed to any or all of the digital outputs. For applications where the VR-608 is primarily used as a signal conditioner, the input to TTLout mapping can be set to start running at power up, even if the host Cube or RACK is not running any applications software. The DNx-VR-608 offers a maximum input pulse rate of 300 kHz. The minimum detectable input signal may be fixed at 50 mVp-p or may be set to “Adaptive Peak Threshold” mode where the threshold is set at approximately 30% of a time averaged input. A watchdog circuit resets the input to minimum threshold level if the input “drops out” for 85 mS. Open sensor/disconnected cable detection is also provided on the VR-608 board
