HLS-DM2 Hearing Loop Driver Module

Hearing Loop Driver Module
Part code: HLS-DM2

The HLS-DM2 OEM Compact Induction Loop Amplifier for Integration is an advanced 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 Low power consumption & simple integration
  • Area coverage of up to 56m2 Two turn perimeter loop @ 1:1 ratio
  • Localised area loops Counters, walls, panels etc
  • Low lifetime cost
  • Excellent reliability, 5 year warranty & free technical support
  • Power supply 12-24V DC
  • Transformer isolated inputs
  • Metal loss correction
  • Unrivalled intelligibility
Specifications (PDF)

Click here to open datasheet in a new tab

HLS-DM2 Hearing Loop Driver Module

The HLS-DM2 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-DM2 the obvious choice for any quality intercom system.

HLS-DM2 OEM Compact Induction Loop Amplifier for Integration 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 and consumption:

  • 12-24V DC: Typical local DC supply inside equipment where another supply is already present.

Whilst the HLS-DM2 draws less than 2.9W @ 12V DC with typical signals, you should still check that any existing supply has enough spare capacity.

The video below is an example of the audio experience for a hearing aid user at a help point with an integrated HLS-DM2.

  • Compact & lightweight
  • Ideal for low profile OEM integrations Low power consumption & simple integration
  • Area coverage of up to 56m2 Two turn perimeter loop @ 1:1 ratio
  • Localised area loops Counters, walls, panels etc
  • Low lifetime cost
  • Excellent reliability, 5 year warranty & free technical support
  • Power supply 12-24V DC
  • Transformer isolated inputs
  • Metal loss correction
  • Unrivalled intelligibility

Inputs

Power Supply Standard format: 12V DC
Nominal voltage: 12-24V DC
Min/Max Voltage: 8-30V DC
Fuse: 1.5A PTC
Power Consumption: 2.88W (240mA) continuous pink noise 9.2W (765mA) continuous sine 0.17W (14mA) quiescent Power Save 14.4W (1200mA) max short term peak
Indication: LED on PCB
Input 1 & 2  Connector:  Wago 2060 cage clamp for 0.2 – 0.75mm2 solid core or untinned fine stranded wire
Line Level Rated source impedance: 1.8kΩ differential,
 Lo Z speaker Input isolation: 1500V
Rated source EMF (sensitivity): -16dBu for full output
Overload: >+22dBu
SnR: >90dB
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: Wago 2061 cage clamp for 0.5 – 1.5mm2 solid core or untinned fine stranded wire.
Loop Impedance  0.3Ω- 1Ω,  1.3Ω reactive at 1.6kHz
Rated Load: 80uH, 0.5R

Audio System

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 Adjustable

Physical

Dimensions
Width 72mm
Length 90.5mm
Height 9mm + mounting clearance
Weight 44g
Environment IP00: (PCB for integration) <90% relative humidity, -30 to 75°C
Heat dissipation < 3W maximum, normally less

Perimeter Loops Area Coverage

The HLS-DM2 can be used to cover a small area using a two turn perimeter loop* at floor level for seated and standing use.

Room aspect ratio 1:1 2:1 3:1
Maximum area m2 56 50 48

* Wire must be 1.5mm2 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 Low power consumption & simple integration
  • Area coverage of up to 56m2 Two turn perimeter loop @ 1:1 ratio
  • Localised area loops Counters, walls, panels etc
  • Low lifetime cost
  • Excellent reliability, 5 year warranty & free technical support
  • Power supply 12-24V DC
  • Transformer isolated inputs
  • 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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