MS Electronics AL-3 User manual

Issue 1.0
Product Guide
An-ligature switches
3-wire versions
AL-3 Standard
AL-3-L with LED indicator
AL-3
AL-3L
today, tomorrow and in the future
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AL-3/AL-3L
Product Overview
The ALS3 An-Ligature Switch is a vandal-resistant touch-sensive switch for acvang/ deacvang the
connected load. It is ideal for applicaons where an-ligature controls are required for compliance and safety
of the room users. The unit is available in two dierent models
The ALS3 is a standard an-ligature switch
The ALS3-L has an illuminated buon to aid locaon of the unit in the dark.
The unit is simple to install and ts a standard single-gang UK paress or back box (20mm min. depth).
Ideal applicaons include small booths or rooms, workshops, entrance halls, staircases, toilets, store
cupboards, hired sports courts and rooms plus many more. Figure
Figure 1a AL-3 Figure 1b AL-3L
Figure 2 Typical wiring example and dimensions (in millimetres)
60.3
2

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Electrical Requirements
Before aempng to install the unit, ensure that the intended load and wiring arrangement comply
with the following requirements. Figure 2 shows a typical wiring example.
•3-wire (live/neutral + volt-free switch) connecon: The unit requires a permanent live/neutral
connecon, and as such is not suitable for replacing an exisng light switch with no neutral
conductor at the switch locaon. A volt-free relay output is provided, which can be used to
switch a load on the same mains supply (by connecng across from L to LIVE IN, making LIVE
OUT a switched live), or to provide a contact closure to a separate load or control signal. There
is no minimum load requirement.
Also available: ALS2 / ALS2-L (2-wire versions) — Suitable for 'inline' connecon with the load to be switched
(no neutral required), such as to replace a standard light switch. A minimum load of 20W (per switch unit)
applies; a load capacitor is required for smaller loads.
•Maximum load: The maximum load rang is 16A (4000W), however for high inrush loads (such
as most types of lighng), a lower limit applies: see Technical Specicaon.
Installaon
1. Prepare a single-gang paress or back box as necessary.
2. Connect the wiring as shown in Figure 2 (or in any suitably appropriate form).
Supply connecons (L, N): Use appropriate mains cable to power the unit. If the load is also powered
via this wiring, ensure the current rang is adequate. Otherwise (i.e. if the output is independently
powered), low-current cable may be used.
Load connecons (LIVE IN, LIVE OUT): Use cable rated for the load current and voltage.
Fix the unit into posion with the two screws and caps supplied.
Addional Guidelines
The screw caps may be removed at a later date with the aid of an adhesive puy such as Blu-Tack.
3
All electrical installaon and maintenance must be carried out by a competent person. If in doubt,
consult a qualied electrician. Any new wiring must be carried out by qualied personnel in accordance
with the current edion of the IET Wiring Regulaons (BS7671).
Ensure the electrical supply is isolated before making any connecons or adjustments.

AL-3/AL-3L
Operaon
The diagram below illustrates the sequence of operaon for the unit.
Operaon Notes
ALS3-L only In the 'OFF' state, the LED is lit to facilitate locaon of the unit in the dark.

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Fault Finding
Load will not switch on
a) Unit is not powered
Ensure the unit is correctly connected to an acve mains supply.
b) Load is not connected correctly
Ensure the load is connected appropriately. The relay output is volt-free so must be connected suitably
to a supply in order to power a load.
Check that the load works on its own by- passing the an-ligature switch.
Technical Specicaon
Power supply
220V – 240V AC 50Hz (live/neutral)
Output switch type
Volt-free SPST (normally open) relay
Output switch rang
16A, 250V AC (resisve)
Maximum lighng load
Incandescent: 12A (3000W)
Fluorescent: 10A (2500W)
Mounng hardware
20mm (min.) single-gang UK paress box
Operang temperature
-10°C to +40°C
Guarantee
3 Years
Weight
87g
Dimensions
86mm x 86mm x 27 mm
5
Ensure the electrical supply to the unit is isolated before making any adjustments.

Issue 1.0
IMPORTANT INSTALLATION NOTICE
The installaon of this product should be carried out in accordance with the latest IEE
wiring regulaons and all wiring completed by a qualied electrician.
e: [email protected]
t: 0333 666 1176/01708 448566
ENERGY SAVING CONTROLS LTD
Energy Saving Controls reserves the right to alter or change this specicaon without
prior noce
Technical Support
For further help or informaon on this and the other products in the MS Electronics range
visit www.mselectronics.co.uk or call 0333 666 1176.
Alternavely, email [e-mail]
Addional copies of this product guide can be downloaded from our website.
Product Warranty
MS Electronics guarantees all their products against manufacturing defects for
3 years from the purchase date. If your product is found to be faulty, MS Electronics will,
at their discreon, repair or replace the product free of charge.
Note
Any modicaon or damage to the outer casing of the product, as well as any
damage to the product due to abuse or incorrect wiring may invalidate the guarantee.