Safety Instructions Components Connections LED Indicators Standards Specifications Troubleshooting Contacta has a policy of continuous product development, therefore small specification changes may not be reflected in this manual. Images, labels, packaging, accessories and product colours are subject to change without notice.
Product Overview The Contacta VLD1 is a compact two output Audio Frequency Hearing Loop Driver for use on passenger vehicles. It is designed to improve communication with all passengers through improved speech intelligibility and signal to noise ratio. The driver uses advanced class D amplifiers and integrated switching power supply offering maximum efficiency.
Safety Instructions Read and keep these instructions. 2. Heed all warnings. 3. Follow all instructions. 4. Do not use this apparatus near water. 5. Clean only with dry cloth. 6. Install in accordance with the manufacturer’s instructions. 7. Do not install near any heat source. 8.
7. 3x 2 Pin Connectors 8. 4 Pin Connector 9. Connector Tool Related Document: VLD1 Software User Guide, available in the Resources section of the Contacta Systems Ltd website: www.contacta.co.uk/resources Cable & Equipment: A length of loop cable determined by the loop design is also required.
Connections Earthing Point DC Power Input USB Input Audio Inputs - B1, B2, A Line Out and SPDIF Input Enables and Status Loop Outputs...
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1. Earthing Point A location is provided for earthing the product to the vehicle; this is not a safety earth, but is required for EMC performance. An M6 bolt and serrated washer are included within the kit for this purpose. 2.
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Connector Type USB Type B 4. Audio Inputs - B1, B2, A All adjustments for the audio inputs are made via the Contacta VLD1 GUI, accessed by connecting a PC to the USB connection. Input B1 This input is transformer isolated. It is designed to be used as a line level input.
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Pin No Pin Description High Level Audio in (Hot) High Level Audio in (Cold) Line Level Audio in (Cold) Line Level Audio in (Hot) Line/Mic in (Hot) Line/Mic in (GND) Voltage Current Frequency Notes Nominal Max/Min Typical 100Vrms-1Vrms <1mA 100Hz -5000Hz Transformer Isolated 1Vrms (0dBV) 2Vrms-0.01Vrms...
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One pair is normally open, and the other is normally closed. These can be connected to external circuits or systems. Should the VLD1 detect a fault the relay will operate. This will open the normally closed contacts and close the normally open contacts.
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Enables EN1 and EN2 These inputs can be configured in the GUI to perform various operations such as muting inputs or enabling low power mode. For details on how to configure the enable please refer to the “Transport Driver Software and Setup Guide”. Pin No Pin Description Enable Return...
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7. Loop Output(s) The loop outputs are configurable from the GUI and can be used in parallel, phased or separate. Loop drive level is also adjustable from the GUI. These outputs are bridged tied meaning that each pin is floating and must not be connected to ground.
LED Indicators Power – Illuminated when the power to the VLD1 is present and within the correct voltage range. 2. Input A – Illuminated when there is a signal present at input A. The pre-amp gain must be set correctly.
– 0dBV) Microphone Input Frequency Range 100Hz-6000Hz (microphone bias: optimized for Contacta Topology Electronically Balanced microphones) Microphone Bias Optimised for Contacta microphones [Optional extra feature, Connection SPDIF not fitted on standard Encoding PCM 16 bit units] Sample Rate 44.1KHz, 48KHz, 96KHz...
2) Use a larger diameter cable. 3) Create a two-turn loop and reduce the current output. 4) Use a higher voltage driver. Please contact your distributor (or Contacta if appropriate) if you are experiencing technical difficulties with the product.
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Local dealer: UK & ROW US & Canada +44 (0) 1732 223900 +1 616 392 3400 sales@contacta.co.uk info@contactainc.com www.contacta.co.uk www.contactainc.com...
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