GST DC-9503E Short Circuit Loop Isolator

The GST DC-9503E is a short-circuit loop isolator for GST addressable fire alarm loops. It isolates a shorted section of the loop so that the rest of the system keeps working and the fault can be found, then automatically reconnects the devices once the short is cleared. It is certified to EN 54-17 and works with the GST-IFP8 and GST200N panels.

Key features

• Isolates a short circuit and restores automatically when it is cleared
• Supports Class A or Class B wiring
• Surface mounting or 35mm DIN rail mounting
• Yellow indicator flashes in standby and stays on in fault
• Up to 70 devices per isolator
• EN 54-17 certified (LPCB, CE)

Technical specifications

• Part number: DC-9503E (product code 10105102)
• Operating voltage: loop 24V DC (16–28V)
• Standby current: 0.15mA
• Action current: 1.5mA
• Capacity: up to 70 devices
• Maximum continuous current: 1A
• Maximum transient current: 5A
• Maximum leakage current: 7.5mA
• Recommended cable: 1.0–2.5mm² twisted pair
• Operating temperature: -10°C to +55°C
• Relative humidity: up to 95%, non-condensing
• Ingress protection: IP30
• Enclosure: white ABS (RAL 9016)
• Dimensions: 78 x 45.3 x 28.5mm
• Weight: approx. 41.4g
• Standard: EN 54-17