AMPETRONIC T14-1 Rail Transport Hearing Loop Driver User Guide

: June 4, 2024
: AMPETRONIC

Table of Contents

T14-1 Rail Transport Hearing Loop Driver
SAFETY
TOOLS AND EQUIPMENT
FRONT PANEL & CONNECTIONS
CONTROLS
USING THE WEBSITE
TROUBLESHOOTING
WARRANTY
BASIC SETUP METHOD
DECLARATION OF CONFORMITY
Documents / Resources

T14-1 Rail Transport
Hearing Loop Driver
User Guide

T14-1 Rail Transport Hearing Loop Driver

This guide should be used for the following products

T14-1LW: Lower (24-36VDC) power, Wago connectors
T14-1LH: Lower (24-36VDC) power, Harting connectors
T14-1UW: Upper (72-110VDC) power, Wago connectors
T14-1UH: Upper (72-110VDC) power, Harting connectors

Box Contents

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

Applicable versions

T14-1LH
T14-1LW
T14-1UH
T14-1UW
including the T14-1V VOIP audio option

Related Documents

T14-1 Handbook (UP1A202)
T14-1 2D Drawing (BC1A210 / BC1A410)
T14-1 Protocol Guide (UP1A205)
Testing Hearing Loops on Rail Vehicles (UP1A208)
T14-1 Connector Pin-outs (UP5A201)
T Series Drilling Template (UP4A201)
T14-1LW 2D & Isometric Drawing (BE1A201)
T14-1LW 3D STEP model (BE0A201)
T14-1UH 2D & Isometric Drawing (BE1A601)
T14-1UH 3D STEP model (BE0A601)

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

It is important to read these instructions and follow them.
Clean only with a dry cloth. Cleaning fluids may affect the equipment.
**** Install in accordance with the manufacturer’s instructions.
Do not install this equipment near any heat sources such as radiators, heating vents, or other apparatus that produces significant heat.
WARNING – THIS APPARATUS MUST BE EARTHED / GROUNDED.
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.
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.
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
RISK OF ELECTRIC SHOCK DO NOT OPEN
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, Loop works 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

M6 Chassis Ground Stud
**** Safety ground connection to vehicle chassis – MUST BE CONNECTED
DC Power Input
• ‘U’ option: 72-110 VDC, use +V(HI) and 0V
• ‘L’ option: 24-36 VDC, use +V(LO) and 0V
Use MCB protection according to manual
Loop Output
Connect loop between the two terminals
Status Output and Input Enable
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.
Analogue Audio Input 1 & 2
For each input, connect to 0V(common) and one of 3V / 30V / 100V, as appropriate for the signal source.
LED Indications
| In startup| Normal operation
---|---|---
STATUS (red/green)| Flash green: Testing Fast flash Amber Updating software| Green: OK
Flash Green: Sleep Slow Flash Amber Standby
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: overtime Fast flash: power limit On both of the above
LOOP 0/C (red)| Fast flash:
Loop low resistance| Slow flash: Loop open circuit
USB ‘A’ connector Firmware/config update from USB memory only
10/100 Ethernet M12 connector, D-coded
Ethernet status/activity LEDs

AMPETRONIC T14-1 Rail Transport Hearing Loop Driver

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, and 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:

Username	Access to
(not logged in)	Status page only (default on first connection)
Audi admin	Audio settings page & Status page
net admin	Network settings page & Status page
superadmin	all pages

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

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 < 200 mΩ 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 it on again.
LOOP > 10R LOOP COULD CLIP| The loop is not an 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 IS TOO HOT PLS SWITCH IT OFF| The heatsink is at a critical temperature and thermal protection has activated at startup. Switch off, fix the fault and switch it 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 an 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 drive 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 exceeded and the loop the signal is being clipped
OUTPUT CLIP – ATTENUATED| The driver output maximum voltage is exceeded and the loop the signal is attenuated to prevent clipping

WARRANTY

This product carries a five-year parts and labor warranty from the date of shipment from Ampetronic. To qualify for the five-year warranty, the product must be registered at www.ampetronic.com (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

a. As a minimum, connect power, loop, and audio input signals (see connections above). Enable and status connects can be used if desired.
b. Connect a computer to the ethernet port as described above. Navigate to http://t14-1n.local and log on using ‘audio admin’ or ‘super admin’.
c. Browse to the ‘Audio’ tab of the website.
d. Apply an input audio signal to the unit, and increase the input gain slider for that input on the website until the compression bar graph shows about 6-12dB compression (and the AGC LED is lit)
e. 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.
f. 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.
g. 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:| T14-1

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 50155: 2017	Railway applications. Rolling stock. Electronic equipment.
EN 45545-2:2013+A1:2015	Railway applications. Fire protection on railway

vehicles.

EMC Standards:

EN 50121-3-2:2016+A1:2019| Railway applications. Electromagnetic compatibility. Rolling stock apparatus.
---|---
Environmental Standards:
EN 61373:2010| Railway applications. Rolling stock equipment. Shock and vibration tests and relevant referenced standards

J.R. Pieters
Managing Director,
Ampetronic Ltd.

CAUTION : Changes or modifications not expressly approved by Ampetronic or an authorized 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 Part15 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.

UP1A202-2 / DOI: 12MAY2022 Contents Copyright
© Ampetronic Ltd 2019-2022. All rights reserved.

Documents / Resources

| AMPETRONIC T14-1 Rail Transport Hearing Loop Driver [pdf] User Guide
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---|---
| AMPETRONIC T14-1 Rail Transport Hearing Loop Driver [pdf] User Guide
T14-1 Rail Transport Hearing Loop Driver, T14-1, Rail Transport Hearing Loop Driver, Transport Hearing Loop Driver, Hearing Loop Driver, Loop Driver, Driver