HLS-DM1 Hearing Loop Module

HLS-DM1 Loop Driver
Part code: HLS-DM1

The HLS-DM1 Hearing Loop Module is an advanced Hearing/Induction Loop driver for use in smaller area local applications. The unit is designed to be integrated into communication systems such as elevators, intercoms, help points and kiosk systems etc. It is backed by Ampetronic’s 5-year warranty and free technical support.

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Features
  • Compact & lightweight. Ideal for low profile OEM integrations
  • Easy & fast installation
  • Constant Current Drive technology for Induction Loop applications
  • Low power consumption & simple integration
  • Area coverage of up to 45m2 with perimeter loop
  • Localised area loops counters, walls, panels etc
  • Low lifetime cost excellent reliability, 5 year warranty & free technical support
  • Power supply: 8 to 24V DC (Standard version)
  • Transformer isolated input
  • Mic Input
  • Metal loss correction
  • Unrivalled intelligibility
Specifications (PDF)

Click here to open datasheet in a new tab

HLS-DM1 Hearing Loop Module
The HLS-DM1 uses efficient class D current drive technology to reduce power consumption and heat output. It is the only small area induction loop driver capable of reliably driving most practical local area loops to meet the IEC60118-4 Standard even where available power or allowable heat is limited, e.g. connecting to equipment that uses PoE or in plastic enclosures. The transformer isolated balanced input allows simple connection to all intercoms, help points and kiosk systems, making the HLS-DM1 the obvious choice for any quality intercom system.

Applications include:

  • Intercom systems for most environments:
    • Lifts / elevators
    • Help & information points
    • Refuge points
    • Door entry systems
    • Car parks & toll booths
    • Security barriers & drive throughs
  • Information points & kiosks
  • Interactive exhibits

Power supply options:

  • 8-24V DC: Typical local DC supply inside equipment where another supply is already present.
Whilst the HLS-DM1 draws less than 3W with typical signals, you should still check that an existing supply has enough spare capacity.
  • Compact & lightweight. Ideal for low profile OEM integrations
  • Easy & fast installation
  • Constant Current Drive technology for Induction Loop applications
  • Low power consumption & simple integration
  • Area coverage of up to 45m2 with perimeter loop
  • Localised area loops counters, walls, panels etc
  • Low lifetime cost excellent reliability, 5 year warranty & free technical support
  • Power supply: 8 to 24V DC (Standard version)
  • Transformer isolated input
  • Mic Input
  • Metal loss correction
  • Unrivalled intelligibility

Inputs

Power Supply Standard format: 12V DC
Nominal voltage: 12V DC
Voltage range: 8-24V DC
Fuse: 1.5A PTC
Power Consumption: 2.88W (240mA) continuous pink noise
9.2W (765mA) continuous sine
14.4W (1200mA) max short term peak
Indication: LED on PCB
Connector: DC: Fixed clamp connector, 1.5mm2
Input 1 Fixed clamp connector, 0.75mm2
Line Level Rated source impedance: 1.8kΩ differential
Input isolation: 1500V
Rated source EMF (sensitivity): -16dBu for full output
Overload: >+22dBu
SnR: >90dB
Adjustment: Level control, per channel
Input 2 Fixed clamp connector, 0.75mm2
Mic Level Rated source impedance: 10kΩ differential
Rated source EMF (sensitivity): -55dBu
Overload: > -22dBu
Bias 12V though 11kΩ
Adjustment: Level control, per channel

Outputs

Loop Output Compliance voltage: 4.2VRMS (6Vpk)
Max output current (sine): 3ARMS
Rated temperature limited output current (pink):  1.5ARMS
Rated time for delivery: 1min
Rated THD: <1%
Output Impedance: >9Ω
Current Adjustment: Full range
Current Indication:: LED indicates 1ARMS
Connector: Fixed clamp connector, 1.5mm2
Loop Impedance  0.3Ω to 1Ω, 1.3Ω reactive at 1.6kHz
Rated Load: 80uH, 0.5R

Audio Sytem

Freq. Response 100Hz to 5kHz ±1.5dB relative to 1kHz at low level, measured as loop current with no metal loss correction.
Compression Time constants optimised for speech
(AGC) Dynamic range: >36dB
Control: by adjusting input level/gain
Indication: LED on PCB
Metal Loss 0dB to 3dB / octave boost
Correction Adjusted on internal screw adjustment control

Physical

Dimensions
Width 72mm
Length 90.5mm
Height 9mm + mounting clearance
Weight 44g
Environment IP00: (PCB for integration)
 Heat dissipation

Perimeter Loops Area Coverage

The HLS-DM1 can be used to cover a small area using a perimeter loop. A two-turn loop will give best results in these small areas:*

Room aspect ratio 1:1 2:1 3:1
Maximum area m2 30 40 45

* Wire must be 2.5mm2 for optimum audio performance in maximum areas shown – see handbook for maximum area with each wire size. Contact Ampetronic for further advice or if best choice is unclear.

hidden tab
Features
  • Compact & lightweight. Ideal for low profile OEM integrations
  • Easy & fast installation
  • Constant Current Drive technology for Induction Loop applications
  • Low power consumption & simple integration
  • Area coverage of up to 45m2 with perimeter loop
  • Localised area loops counters, walls, panels etc
  • Low lifetime cost excellent reliability, 5 year warranty & free technical support
  • Power supply: 8 to 24V DC (Standard version)
  • Transformer isolated input
  • Mic Input
  • Metal loss correction
  • Unrivalled intelligibility
Specifications (PDF)

Click here to open datasheet in a new tab

Book a demonstration

For more information on these products or any other requirement you may have, please complete the form or call us on +44 (0) 1636 610062

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