CFA633 USB

Robust packet based communications protocol with 16-bit CRC.
Compact size: fits in a 1U rack mount case (35 mm overall height).
Advanced digital GPIO control with PWM output.
Four fan connectors with RPM monitoring or variable PWM fan power control.
NOTE: Not recommended for use with 4-Wire fans
Available in a 5.25" half-height LCD drive bay kit.
ATX power supply control functionality allows the buttons on the CFA-633 to replace the "power" and "reset" buttons on your system, simplifying your front panel design.
Temperature monitoring: up to 32 channels at up to 0.5 deg C absolute accuracy. Ready-to-use WRDOWY17 Dallas Semiconductor 1-Wire temperature sensors are optional. Alternatively, you can create your own sensors using DS1822 or DS18B20 parts and the tutorial on creating temperature sensors.
Integrated LED backlit 6-button translucent silicon keypad with screened legend.
"Fail-Safe" fan power setting allows safe host fan control based on temperature.
Non-volatile memory ("EEPROM") capability: Customize the "power-on" display settings plus a 16-byte "scratch" register for storing IP, netmask, system serial number, etc.