Related Manuals for Edin Univox TLS-2.2
Summary of Contents for Edin Univox TLS-2.2
- Page 1 Univox® TLS-2.2 Loop amplifier for railway use Technical manual and installation guide...
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Page 2: Table Of Contents
Content Safety Univox TLS-2.2 - Introduction Planning and setup of hearing loop systems on-board a train car General information about loop systems Background noise Loop cable and its position Installation Univox setup procedure Trouble shooting General information... -
Page 3: Safety
IP class 40 Univox TLS-2.2 - Introduction Univox TLS-2.2 is an audio induction loop driver developed for hearing loop installations in railway and other large vehicle applications. With its rugged and sophisticated design TLS-2.2 ensures efficient and reliable operations in environments completely or partially enclosed by metal, like train cars, trams, subways and ships. - Page 4 • EN 45545-2 Fire protection of railway vehicles - Part 2: Requirement for fire behaviours of materials and components, HL2 (Hazard Level 2) Univox TLS-2.2 has been tested against and fulfils the requirements in all the above standards. TLS-2.2 ha also passed the test for the following American standards: •...
- Page 5 Univox TLS-2.2 - driver 86 mm 219 mm 290 mm Weight: 2940g Front side - overview Rugged WAGO con- nectors for railway applications Power LED Input level LED Loop LED Power connector Input connector Diagnostic output Loop cable connector connector...
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Page 6: Planning And Setup Of Hearing Loop Systems On-Board A Train Car
Overview of the different connections and connectors Connector Function description Name Type Gender Pin signal Pin no. Voltage Current Loop + WAGO Loop wire J1-Loop Male <35Vrms <30Arms 769662 connection Loop - Open 20mA Diagnostic collector signal Emitter 20mA J2-Power WAGO Male <15ADC... -
Page 7: General Information About Loop Systems
With the test loop in place, the input sensitivity, loop output level and possible Metal Loss Compensation (MLC) level, can be determined during an on-site measurement of the test loop. If needed, adjustments to the loop figuration, loop cable location, cable type and cross-section and location of the loop driver can be done at this point. -
Page 8: Loop Cable And Its Position
The IEC 60118-4 recommends a maximum magnetic background noise level of -22dB(A) for announcements. With a stipulated field strength level of 0dB in the program peaks, this equals a signal-to-noise (S/N) ratio of 22dB(A). The PA speaker level in trains is normally specified for a S/N ratio of 15dB(A), i.e. the speaker level is 15dB higher compared to the acoustic A-weighted ambient noise. - Page 9 Location of loop cable Metal The loop wire should be placed as far as practically possible from any metal structures to avoid excessive attenuation of the field strength. Even small variations in distance can in- fluence the performance of the loop substantially. It is recommended to add some distan- ces, whenever possible, to the metal chassis when altering the cable path.
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Page 10: Installation
Low voltage power supplies (LVPS) need to be fused. Actual fuse specification is highly dependent on the loop figuration. In a suggested figuration we estimate 8A (slow) will be sufficient even for the most demanding loops. Univox TLS-2.2 has a non-retrigger fuse 10A (slow) built into the unit. Quiescent current is approximately 50-100mA. - Page 11 Grounding Signal ground (from PIS) and chassis ground must be kept galvanically separated to avoid floating ground loops. The actual DC shift between the two ground systems needs to be specified before installation, but must never exceed 1500VDC. To avoid any risk of damage due to potential differences between the loop amplifier and other connected units, a floa- ting output DC/DC converter is strongly recommended.
- Page 12 Signal source (from train PA system) The TLS 2.2 input is galvanically isolated, fully balanced and low-pass filtered with common mode transformer, to avoid EMI interference. Recommended source signal: Low Ohmic (OP amplifier or such), fully balanced with a quality screen. Recommended input level: 0dBu=0.775Vrms according to audio standard (+4dBu will give another 4dB noise headroom but the advantage is marginal).
- Page 13 If all DIP switches are set to OFF (left position), no damping of the input signal will result. However if for example the 16dB switch is set to ON, the input signal will be attenuated by 16dB. If two or more DIP switches are set to ON, the combined damping effect of both switches will occur.
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Page 14: Univox Setup Procedure
The typical set up for the initial train start-up procedure: • When booting the on-board computer system an audio test signal activates the 20mA current loop, to verify the function of the hearing loop systems • The loop amplifier´s opto-coupler indicates if there is any loop output current, i.e. the hearing loop driver transmits •... - Page 15 4. Plan for the loop layout of the loop cable and its placement, considering all parameters as discussed above and as described above 5. An initial test with a loop wire of 2.5-5mm2 using a 4-turn connection is recommended. Select a cable practical for the installation, such as a flat wire with four conductors or two twin-cables giving four conductors.
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Page 16: Trouble Shooting
d. If there is no significant level difference when alternating the number of turns, repeat the above installation procedure by using an oscilloscope (current clamp). Set the output level accepting slightly clipping (rounding in current domain) in the high-level speech peaks on each connection. Choose the highest number of turns that will fulfil or give the highest level at the reference position 16. -
Page 17: General Information
Please also note that warranty is not valid for any damage or defects on the product due to incorrect or incautious handling. Bo Edin AB shall not be held responsible or liable for interference to radio or TV equipment, and/or to any direct, incidental or consequential damages or losses to any person or entity, if the equipment has been installed by unqualified personnel and/or if installation instruc- tions stated in the product Installation Guide have not been strictly followed. - Page 18 For additional information, please refer to product data sheet/brochure and CE certificate which can be downloaded from www.univox.eu. If required, spare part lists or other techni- cal documents can be ordered through support@edin.se. Environment and recycling directives Please follow existing disposal regulations. Thus, if you respect these instructions you...
- Page 19 Notes _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________ _______________________________________...
- Page 20 +46 (0)8 767 18 18 Bo Edin AB info@edin.se Sweden and International Sales www.univox.eu Hearing excellence since 1965...
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