Linesense Digital Location Interface

(Monitoring distance 10km)

Dimensions: H200 x W164 x D116 mm
Part Number: 52100-002 & 52100-004


The Digital Location Interface (DLI) monitors the Linear Heat Detection (LHD) cable and when activated identifies the location of the alarm. The distance in meters is then displayed on the 4 digit LCD. Providing detection and location along the complete length of the LHD cable.

With the ability to monitor up to 10,000m for both Fire and Fault conditions the DLI enhances any fire detection capability and allows an appropriate action to be taken.

The DLI offers flexible interfacing options, designed as a two wire device for connecting directly into a conventional fire alarm panel, it also has the ability to signal via volt free relay contacts for Fire and Fault, plus a 4-20 mA output representing 0m to 10,000m.

The DLI is available as a DIN Rail mountable unit or fitted into an IP 65 weather proof enclosure.


  • Detection & display of Alarm location for the complete length of LHD cable, from 0m to 9,999m
  • 4 Digit LCD
  • LED Fire and Fault indicators
  • Fire and Fault Test Functions
  • DIN Rail mounted or IP 65 Housing available
  • Volt free relay outputs for Fire and Fault
  • 4-20mA output
  • Configurable for 2 wire mode
  • Remote reset input


  • Power Generation
  • Cable Trays / Tunnels
  • Road and Rail Tunnels
  • Car Parks
  • Conveyors (Bearing) protection
  • Storage racks warehouse, Refrigerated rooms and cold stores.


Operating voltage:

14 - 30 VDC Two wire mode
20 - 30 VDC Relay mode

Operating Current Normal:

1.7 mA Two wire mode
11.5 mA Relay mode.

Fire Alarm (max):

12 mA Two wire mode
29 mA Relay mode.

Fault Condition:

700 uA




2 x VFCO relays, 1 amp 24 VDC / 120 VAC Resistive


2 x VFCO relays, 1 amp 24 VDC / 120 VAC Resistive

4 - 20 mA signal loop output



4 Digit (Accuracy ±1 digit, Tolerance ±3%)


Remote Reset

Maximum length of LHD:




H105 x W86 x D58 mm (DIN Rail version)
H200 x W164 x D116 mm (Polystyrene enclosure)
Cable entries : 4 x M20, 1 x M25 Top
4 x M20, 1 x M25 Bottom
2 x M20 each side.


SIL-2 Capable - Third party assessed to IEC61508

Ordering Information

Part Number



DLI-10K Digital Location Interface 10Km (IP65 Enclosure)


DLI-10K Digital Location Interface 10Km (DIN rail version)

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