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  • Easy to Use
  • Reduce Installation Cost
  • Simple Expansion Using Existing Wiring
  • FAST™ Addressing
  • Integral Short Circuit Isolator
  • Auxiliary 24V dc Powered
  • Protec Conventional Detector and Call Point Zone
  • Built in Sounder Circuit Monitored for Open / Short Circuit Faults
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The Protec 6000/APZA is a zone alarm interface which allows the 6000 series intelligent addressable loop to interface to a zone of conventional devices and a conventional sounder circuit.

This interface is ideally suited for small conventional fire detection to be fully integrated with Protec Intelligent addressable systems. The 6000/APZA is powered using an external EN54 Part 4 power supply. It can support up to 20 Protec conventional (3000PLUS) detectors.
The zone end of line is selectable using the on board DIL switch and can be programmed to resistive or capacitive as per the requirement of BS5939-1. The sounder circuit is monitored for open and short circuit faults and has 1A current drive capability.

The interface has an inbuilt loop short circuit isolator fitted as standard.

Loop Protocol

Protec Algo-tec 6000™

Loop Isolator


Loop Voltage

18 to 28V peak loop

Number of Addresses


24V Auxiliary Voltage

18 to 28V dc


-10 to 50°C (maximum 95% RH no condensation or icing)

Loop Quiescent Current


Loop Alarm Current


Auxiliary 24V Current

0.6mA Quiescent + detector load ( 13mA max ) + resistive end of line load ( 3mA )
7.5mA Alarm, plus zone circuit current and sounder circuit current

Zone Circuit EOL²

Resistive - 8.2Ω ±5% ¼W                                              Capacitive - 100µF ±20% in series with 22Ω ±5% ¼W

Manual Call Point

Must be fitted with a 330Ω or 180Ω series resistor

Detectors Supported

Protec 3000 and 3000PLUS

Sounders Supported

Protec 3000 series

Sounder Circuit EOL²

10kΩ ±5% ¼W

Sounder Circuit Current





On-board red indicating LED showing when the device is polled, or in the alarm state

Product Approval

BSI Kitemark No: KM589455
CoCP No: 0086-CPR-589456
DoP No: PFD-CPR-0059
Relevant Standard: EN54-17 & 18
CE Marked

Note: EOL = End of Line

Loop Diagram

Download Technical Information

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