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The AEL02 Active End of Line Device enables ASL amplifier systems to monitor either single or dual loudspeaker circuits without the need for DC blocking capacitors in the loudspeakers. This makes it ideal for retrofitting into existing installations where it is not possible to modify the installed loudspeakers.
The loudspeaker monitoring using the AEL02 is fully compliant with BSEN 5839 Pt 8. The AEL02 operates by utilising 30 Hz and 20 kHz surveillance tones that are output by the iPAM400 Intelligent Public Address Amplifier Mainframe, or by LSDDC or LSIDC amplifier interfaces in other types of ASL amplifier systems*,**. The AEL02 derives power from the 20 kHz surveillance tone, and monitors the line integrity by detecting the 30 Hz surveillance tone. On detection of the 30 Hz surveillance tone, the unit introduces a periodic signal current which the standard circuit within the ASL amplifier systems unit can detect. If the 30 Hz tone is lost due to open or short circuit, then this periodic signal disappears and a line fault is reported. The earth monitoring circuit within the ASL amplifier system can still detect ‘real’ earth faults.
The AEL02 is fitted at the end on the loudspeaker circuit across the 100 V line, and with an additional connection to earth. This earth is ideally via the loudspeaker drain wire provided that continuity is maintained back to the rack (Figure 1), or can be a local earth*** (Figure 2).
Two AEL02 units may coexist on an amplifier which enables dual A&B loudspeaker circuit monitoring. In this application each AEL02 is set to act for either the A or B circuit by an internal link in order to separately signal to a single LSDDC interface card.
The diagrams in Figure 1 and Figure 2 show the AEL02 in general context in relation to other system components. They also illustrate the possible connections to earth. Field connections are provided by an internal 3-way ceramic block terminal which together with a thermal fuse prevents any short circuits on the loudspeaker line in the event of extreme temperatures. The unit is housed in an IP65 rated diecast aluminium enclosure.
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Orders placed though the Amber Technology website are despatched from our Sydney warehouse. Orders placed before 1.00pm Sydney time (for items in stock) will generally be shipped on the same day.
We ship using Startrack Express. We deliver Australia-wide to residential, business and PO box addresses.
Shipping is free for all orders over $275 including GST (effective 1 March 2018). There is a $22 (including GST) shipping and handling charge for all orders under $275 including GST.
You can track your shipment through the web sites of our couriers:
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Tracking numbers for your order can be found in the order history section of your dashboard. If you have any questions regarding shipping, please contact us.
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
All items purchased from Amber Technology will be covered under warranty. The duration and terms of this warranty are specified by the manufacturer unless otherwise stated. Warranty information is available on the individual product listings on this site.
Refurbished items will include a 12 month warranty unless otherwise stated.Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.
Amber Technology maintains a nation-wide network of carefully selected Authorised Service Agents to ensure that you are never far from convenient, expert technical and service support. If your item develops a problem and requires servicing under warranty, please contact your local Authorised Service Agent.
The availability of stock is communicated via the indicator of each product listing page. "Available" means that reasonable stock is in our warehouse, ready for immediate shipment. "Limited Stock" means that we have only a small number of items in stock. "Out of Stock" means this item is currently unavailable for immediate shipment - orders placed for ‘Out of Stock’ items will be fulfilled as soon as replacement stock arrives.
"Special Order” items are products that are not generally kept in stock in Australia. Lead times for Special Order items vary depending on country of origin, manufacturer’s stock levels, factory production schedules and/or incoming shipment transit times. Please contact us for an estimate as to the likely lead time. Please note that finalized sales for special order items cannot be cancelled.
If refurbished stock is available, this will be shown on the summary page for the product. If a product listing only allows you to choose refurbished stock, we are not holding new stock and we can no longer obtain new stock.
Refurbished items are always in perfect working order and will include all accessories. Refurbished items are may
Refurbished items include a 12-Month warranty unless otherwise stated.
Please visit the Get Support page to find a service agent, log a service ticket, or ask a technical question about your product.
Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.