Analogue Isolator Base B524IEFT

Analogue Isolator Base for detector SYSTEM SENSOR B524IEFT
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B524IEFT - Analogue Isolator Base SYSTEM SENSOR

The System Sensor B524IEFT-1 isolator base is designed for use with all System Sensor 200 analogue addressable detectors. The B524IEFT isolator base prevents an entire communications loop from being disabled when a short circuit occurs. It achieves this by isolating the part of the loop containing the short from the remainder of the circuit. The base will automatically restore the entire loop when the cause of the short circuit is corrected. Up to 20 devices may be isolated per isolator base, depending on the device type.
This base accepts the following System Sensor detectors : 1551E, 2551E, 5551E, 5551HTE, 5551RE, 1251E and 2251E.


- Low profile (26mm)
- Low Current consumption (100 uA)
- Up to 99 isolators per loop
- Complete isolation of short circuits
- Automatic restore when short circuit is corrected
- Rugged industrial construction
- Remote LED Connection
- Sensor continues to operate in case of a short circuit on either side of isolator base


  • Operating Voltage Range : 15 to 28.5VDC
  • Standby Current : 100uA maximum @ 24VDC
  • Maximum ON Resistance (24V) : 0.2 ohms
  • Maximum ON Resistance (15V) : 0.29 ohms
  • Application Temperature Range : -30°C to +70°C
  • Operating Humidity : 0 to 95% Relative Humidity (non-condensing)
  • Base Diameter : 102mm
  • Base Height : 26mm
  • Max Wire Gauge for Terminals : 0.5mm2 - 1.5mm2
  • Weight : 70g