The Short Circuit Isolator (FQIU004-SCI) is used to provide additional reliability for a fire protection system by isolating a segment of an Signaling
Line Circuit (SLC) in which a short circuit has occurred. This makes it possible for the remainder of the loop to provide normal monitoring functions.
FQIU004-SCI employs one red LED to indicate the status. In normal condition, the LED is deactivated. When the short circuit is happened,
FQIU004-SCI will cut off the short circuit and turn on the LED.