The
controller features 5 relays that offer a large amount of flexibility
and customization within your system. Two relays are programmable with
one intended for fan operations and the other for alarm (all output high
voltage only - do not connect low voltage products to the unit). The
three fan relays trigger in relation to the user defined temperature set
point with relay #1 triggered at the set point, #2 triggered at
approximately 6 degrees higher, and #3 triggered at approximately 15
degrees higher than the main set point. For example, if you have an
existing rack with high-voltage fans, you could attach primary fans to
relay #1 and then secondary fans to relay #2. Venting fans could then be
connected to relay #3. Ultimately the two alarm relays, 4 and 5, could
be used to sound an audible alarm or power emergency fans to protect
against a catastrophic failure if installed, for instance, in a rack
full of server and switching equipment.
Please
Note: This is a high voltage product. Be sure to contract a licensed
electrician to ensure a safe and proper installation according to local
codes.