GFE AD ISO

Global Fire Equipment GFE-AD-ISO Standalone Loop Isolator

Loop-powered addressable negative-switching isolator designed to protect addressable detection loops by isolating short-circuits on the loop of all GFE addressable fire alarm control panels.

Main Features:

• Loop operating voltage: 17 V to 40 V DC
• Quiescent loop current: 0.25 mA @ 28 V nominal
• Loop current when isolated LED is on: ~6.2 mA @ 28 V nominal
• Maximum series impedance: 28 m?
• Maximum leakage current: 2.7 mA
• Maximum rated switching current: 1 A
• Cable size: up to 2.5 mm² conductor
• Operating temperature: ?10 °C to +50 °C; up to 95% RH non-condensing
• Housing: ABS plastic (white or red); IP rating: IP50
• Dimensions: approximately Ø 100 mm × 48 mm (H); Weight: ~105 g (module) / ~142 g including packaging
• Compliant with EN54-17 for short-circuit isolators
• Allows up to 32 detection devices to be connected between two isolators, maintaining loop integrity in case of short-circuit

Notes:

• The module is polarity sensitive — ensure correct wiring orientation for loop “IN” and “OUT”.
• When a short-circuit occurs between two isolators, the two yellow LEDs (one on each isolator) identify the section containing the fault; the loop is still maintained for unaffected sections.
• After the short-circuit fault is removed, the isolator automatically reconnects the loop section once resistance exceeds the threshold; the control panel may require reset.
• Installation must consider loop load, correct termination and compliance with EN54-13 for system-wide certification.