Context UL-Plus common Isolating base for the Context UL-Plus detectors. Isolating Base c/w Xpert card- UL LISTED

The Context UL-Plus common Isolating base for the Context UL-Plus detectors. Isolating Base c/w Xpert card- UL LISTED is part of the Analogue Addressable Fire Detectors range from Context Plus, supplied and supported by SPS. The Isolating Base senses and detects short-circuit faults on the addressable loops and spurs. Designed to sense and isolate short-circuits on Context Plus addressable loops, the Context Plus Negative Switching Isolating base can be used in place of standard bases.

Specifications & features

• The Isolating Base senses and detects short-circuit faults on the addressable loops and spurs.
• Designed to sense and isolate short-circuits on Context Plus addressable loops, the Context Plus Negative Switching Isolating base can be used in place of standard bases.
• Under normal operating conditions the isolating circuit provides a low resistance of 0.2 ohm in either direction.
• If the loop voltage falls to 14±0.4V the isolator will switch from the closed state to the open state in order to isolate the loop ‘in’ and ‘out’ lines.
• The isolated section is tested every four seconds and is automatically re- connected when the load resistance is 175 or greater.
• Up to 20 detectors or the equivalent load may be connected between two isolating circuits.
• Interfaces and sounders are counted as one detector for every milliampere of switch-on surge current.
• A Yellow LED illuminates if a short-circuit is detected either side of the isolator.
• When the short-circuit is removed, the power will automatically be restored.