AMPETRONIC T14-1 Bus and Coach Transport Hearing Loop Driver User Guide

AMPETRONIC T14-1 Bus and Coach Transport Hearing Loop Driver

Product Information

The T14-1LB is a versatile audio device that is designed to provide high- quality audio output. It is equipped with a range of features and connections to ensure optimal performance and ease of use. The device supports the T14-1V VOIP audio option, allowing for seamless integration with VOIP systems.

Box Contents

• T14-1LB audio device
• Related documents

Safety Instructions

It is important to follow the safety instructions provided to ensure safe and proper usage of the device:

1. Read and follow the instructions carefully.
2. Clean the device only with a dry cloth. Avoid using cleaning fluids, as they may damage the equipment.
3. Install the device according to the manufacturer’s instructions.
4. Avoid placing the equipment near heat sources.
5. Contact qualified personnel for servicing if the device has been damaged or exposed to moisture.
6. Exercise caution when connecting the device to a 70V/100V line speaker system, as it may involve the risk of electric shock.
7. Do not remove the cover of the device, as there are no user-serviceable parts inside. Refer servicing to qualified personnel.

Tools and Equipment

To set up and maintain the T14-1LB, you will need the following tools and equipment:

• Small hand tools, including a wire stripper and small flat blade screwdrivers
• Magnetic field strength meter or an induction loop receiver to check loop system performance
• Loopworks Measure App & R1 Receiver (recommended) for comprehensive loop system measurement

Front Panel & Connections

The front panel of the T14-1LB features various connectors and indicators for easy setup and monitoring:

• M6 Chassis Ground Stud: Connect the safety ground to the vehicle chassis. This connection is mandatory.
• Loop Output: Connect the loop between the two terminals.
• Status Output and Input Enable: The status output is an isolated relay contact. To remotely enable an input, apply +5V to +24V DC between the relevant input terminal and common. Note that remote control must be enabled in the web interface before use.
• Analogue Audio Input 1 & 2: For each input, connect to 0V (common) and one of 3V / 30V / 100V, depending on the signal source.

LED Indications:

• STATUS (red/green): Indicates the overall status of the device.
• AGC (green): Green light indicates the signal is more than 6dB above AGC threshold.
• CLIP (red): Red light indicates clipping in the output.
• CURRENT (green): Green light indicates normal current flow.
• PROTECT (red): Red light indicates a protective measure is activated.
• LOOP O/C (red): Red light indicates an open circuit in the loop.

Front Panel Connectors:

• USB `A’ connector: Used for firmware and configuration updates from USB memory only.
• 10/100 Ethernet M12 connector, D-coded: Connects to Ethernet for network connectivity.

Controls

The T14-1LB is controlled through a built-in website interface. To access this interface, you need to know the IP address or hostname of the driver. DHCP is enabled by default, and the driver supports both direct connection and larger managed networks. Ensure
that your device with a web browser is on the same subnet as the driver.

Refer to the complete user manual for detailed instructions on advanced settings and usage of the T14-1LB audio device.

This guide should be used for the following products

T14-1LB: Bus approvals, 24V power, Wago connectors

• including the T14-1V VOIP audio option

Box Contents

• 1 x T14-1LB Driver
• 1 x T14-1LB Quick Start Guide (this document)

Related Documents

• T14-1 Handbook Bus (UP1AB02)
• T14-1 2D Drawing (BC1A210)
• T14-1 Protocol Guide (UP1A205)
• T14-1 Connector Pin-outs (UP5A201)
• T Series Drilling Template (UP4A201)
• T14-1x Wago 3D STEP model (BE0A201)

This symbol is used to alert the user to important operating or maintenance instructions. The Lightning bolt triangle is used to alert the user to the risk of electric shock.

SAFETY

1.  It is important to read these instructions, and to follow them.
2. Clean only with a dry cloth. Cleaning fluids may affect the equipment.
3. Install in accordance with the manufacturer’s instructions.
4. Do not install this equipment near any heat sources such as radiators, heating vents or other apparatusthat produces significant heat.
5. WARNING – THIS APPARATUS MUST BE EARTHED / GROUNDED.
6. Refer all servicing to qualified personnel. Servicing is required when the apparatus has been damaged in any way, such as a power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to any rain or moisture, does not operate normally or has been dropped.
7. WARNING – To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. The apparatus shall not be exposed to dripping or splashing and no objects filled with liquids shall be placed on the apparatus.
8. WARNING – Connection to a 70V/100V line speaker system may involve the risk of electric shock and therefore must be carried out by an instructed or skilled person.

CAUTION
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE THE COVER. THERE ARE NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL

TOOLS AND EQUIPMENT

Small hand tools including a wire stripper, and small flat-blade screwdrivers will be required.A magnetic field strength meter, Loopworks Measure App & R1 Receiver, or at minimum an induction loop receiver is vital to check that the loop system is providing the desired level of performance.

FRONT PANEL & CONNECTIONS

1. M6 Chassis Ground Stud
   Safety ground connection to vehicle chassis – MUST BE CONNECTED

2. DC Power Input (Wago)
   24 VDC, use +V(LO) and 0V
   Use MCB protection according to manual

3. Loop Output
   Connect loop between the two terminals Status Output and Input Enable

4. Status output is an isolated relay contact To remotely enable an input, apply +5V to +24V DC between the relevant input terminal and common.
   NB remote control must be enabled in the web interface before use.

5. Analogue Audio Input 1 & 2
   For each input, connect to 0V(common) and one of 3V / 30V / 100V, as appropriate for the signal source.

6. LED Indications
    | In startup| Normal

operation

---|---|---
STATUS

(red/green)

| Flash green: Testing Fast Flash amber: Updating software| Green: OK

Flash Green: Sleep Flash Amber: Standby Flash red: Error

AGC

(green)

| –| Green: Signal >6dB above AGC threshold
CLIP

(red)

| –| Red: Clipping (output)
CURRENT

(green)

| Slow flash : overcurrent| Green: Output >-20dB (flashes on/off in normal use)
PROTECT

(red)

| Slow flash: overcurrent| Slow flash: overtemp Fast flash: power limit On: both of the above
LOOP O/C

(red)

| Fast flash :

Loop low resistance

| Slow flash:

Loop open circuit

7. USB ‘A’ connector Firmware/config update from USB memory only
8. 10/100 Ethernet M12 connector, D-coded
9. Ethernet status / activity LEDs

Figure 1: Front panel, WAGO connectors

CONTROLS

The T14-1 is controlled through a built-in website interface, to access this you will need to know the IP address or hostname of the driver. DHCP is enabled by default and the driver supports direct connection or larger managed networks. You must have a device with a web browser on the same subnet as the driver. DHCP Enabled Network: use the admin interface of your DHCP server to find the IP address of each driver. Alternatively use an IP scanner utility. Enter the IP in the address bar of your web browser.
Direct Connection: enter http://t14-1n.local in the address bar of your web browser. Check the driver is on the latest firmware before installation, compare the Status page to the latest version available at www.ampetronic.com /firmware-updates/

USING THE WEBSITE

The web interface is used to monitor and adjust the driver.
Four levels of access are available, usernames and passwords are case- sensitive:

For all usernames, the default password = ampetronic (all lowercase)
You can change the password for each user from the website. For full details of the web control interface see the T14-1 product handbook.

TROUBLESHOOTING

In case of error, the website Status tab colour will change and error messages will be displayed on the Status page.

Startup test messages

DIAGNOSTICS IN PROGRESS| This message is displayed whilst start-up tests are being performed. Not an error.
LOOP R < 200mR FIX AND RESTART| The driver measured < 200mΩ for the loop impedance. This is too low for the driver and must be fixed before the driver will finish the start-up diagnostics. Switch off, fix the fault and switch on again.
LOOP > 10R LOOP COULD CLIP| The loop is not open circuit but has a resistance of > 10Ω. This is too high – the output will clip on signal peaks. This is a warning and the driver will continue to operate.
HEATSINK TOO HOT PLS SWITCH OFF| The heatsink is at a critical temperature and thermal protection has

activated at startup. Switch off, fix the fault and switch on again.

OUT IDLE OVERCURRENT

OUT FUNC TEST HIGH OVERCURRENT

| Error in the internal circuitry of the driver. Please contact Ampetronic technical support if any of these errors are seen, quoting the error message text.
Error messages during operation
OUTPUT OPEN CIRCUIT| This message is displayed if the loop is disconnected whilst the driver is operating (e.g. if the loop is cut). This is a critical state and the output will not operate.
LOOP > 10R LOOP COULD CLIP| The loop is not open circuit but has a resistance of > 10Ω. (See notes above for startup error)
POWER LIMIT – DERATED| The driver is overloaded and the drive current has been reduced
POWER LIMIT – SHUTDOWN| The driver is seriously overloaded and the loop output has been shut

down

TEMP LIMIT – DERATED| The internal heatsink is hot and the driver current has been reduced.
TEMP LIMIT – MUTED| The internal heatsink is too hot and the output has been turned off.
OUTPUT CLIPPING| The driver output maximum voltage is being exceeded and the loop signal is being clipped
OUTPUT CLIP – ATTENUATED| The driver output maximum voltage is being exceeded and the loop signal is being attenuated to prevent clipping

WARRANTY

This product carries a five year parts and labour warranty from date of shipment from Ampetronic. To qualify for the five year warranty, the product must be registered at www.ampetronic.co (products/warranty), without which the warranty will be valid for two years only. The warranty could be invalidated if the instructions in this handbook are not followed correctly, or if the unit is misused in any way.

BASIC SETUP METHOD

• As a minimum, connect power, loop, and audio input signals (see connections above). Enable and status connects can be used if desired.
• Connect a computer to the ethernet port as described above. Navigate to http://t14-1n.local and log on using ‘audioadmin’ or ‘superadmin’.
• Browse to the ‘Audio’ tab of the website.
• Apply an input audio signal to the unit, and increase the input gain slider for that input on the website until the compression bargraph shows about 6-12dB compression (and the AGC LED is lit)
• Enable the ‘combi’ test signal using the website interface. Turn up the loop output current until the correct magnetic field strength (0dB re: 400mAm-1) is obtained in the intended area of use. Measure the magnetic field strength using a magnetic field strength meter.
• Enable the ‘pink noise’ test signal using the website interface. Use the magnetic field strength meter to measure the frequency response of the magnetic field. On the website adjust the Metal Loss Control (using the dual-slope feature if necessary to correct a more complex curve), and repeat the test adjusting until the frequency response is +/- 3dB re: 1kHz value over the 100Hz to 5kHz range.
• Turn off the test signals and connect the intended audio input signals, adjusting input attenuation so that the AGC LED is lit when audio is present.

DECLARATION OF CONFORMITY

Manufacturer:
Ampetronic Ltd.
Unit 2, Trentside Business Village, Farndon Road, Newark, Nottinghamshire, NG24 4XB, United Kingdom.

Declares that the product:

Description: Hearing / Induction Loop Driver
Type name: T14-1LB

in accordance with the following statutory instruments:

• 2017 No. 1206 Radio Equipment Regulations and its amending directives
• 2016 No. 1091 Electromagnetic Compatibility Regulations and its amending directives
• 2017 No. 1206 Radio Equipment Regulations and its amending directives
• 2012 No. 3032 RoHS in Electrical and Electronic Equipment Regulations and its amending directives
• 2006 No. 1907 UK REACH Regulations and its amending directives

in accordance with the following directives, conforms to the following Directive(s) and Norm(s):

• 2014 / 35 / EU The Low Voltage Directive and its amending directives
• 2014 / 30 / EU The Electromagnetic Compatibility Directive and its amending directives
• 2011 / 65 / EU The RoHS Directive and its amending directives

and has been designed and manufactured to the following specifications:

Safety & General Standards:
EN 62368-1, UN/ECE-R10

EMC Standards:
EN 55032, EN55035

Environmental Standards:
EN 61373
Date: February 2023
J.R. Pieters
Managing Director,
Ampetronic Ltd.

FCC

CAUTION: Changes or modifications not expressly approved by Ampetronic or an authorised partner could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at their own expense

UP1AB02-3 / DOI: FEB2023 Contents Copyright © Ampetronic Ltd 2023. All rights reserved.

References

• Ampetronic hearing loop system drivers and loop design - 60118-4
• Ampetronic Firmware Updates

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