MLS2421DF & MLS2421DSM for DSI ballasts
MLS2421DALIF & MLS2421DALISM for DALI ballasts
Digital Gold Series Detector
with regulating photocell
MLS2421DF
MLS2421DALIF
MLS2421DALIFXAA
MLS2421DSM
MLS2421DALISM
Installation and Commissioning
Instructions
Note: QuickSet Pro required for commissioning
Digital Gold Series Detector with Regulating Photocell
Please note that UltraLite versions of these detectors (suffix CWL7) do not offer MLS functionality
and cannot be connected using MLS cable.
Only suitably qualified personnel should install this equipment.
The Digital Gold is a high-performance, communicating presence detector which can be used as part of a full
Ex-Or MLS Digital Managed Lighting System or as a stand-alone unit. The MLS2421D detector is equipped
with a regulating photocell to control digital DSI or DALI ballasts (when using the detector’s Digital Output)
and a volt-free output for control of non-dimmable lighting loads. Digital Gold incorporates Ex-Or’s OneSwitch
Dimming, local manual operation of any controlled lighting load.
Location
This is an extremely sensitive movement detector; it is essential therefore that it be installed on a rigid surface
that will not itself be subject to movement or vibration.
Please note that this detector is not recommended for applications where there are large surface areas of
metal, e.g. metal ceiling or floor tiles, as unpredictable sensitivity may result.
The units are graded according to four variations in operating frequency. Each type can be identified by
different colour-coding on the detector label and carton. For reliable operation it is essential that units of the
same colour code do not occupy adjacent positions in open-plan areas or in adjoining rooms (see below).
Blue
Red
Red
Red
Yellow
Green
YellowBlue
Green
YellowBlue
Green
Blue
Red
Blue
Red
Blue
Red
Yellow
Green
Yellow
Green
Yellow
Green
YellowBlue
Red
Green
YellowBlue
Red
Green
YellowBlue
Red
Green
Blue
Red
Red
Red
Yellow
Green
YellowBlue
Green
YellowBlue
Green
Blue
Red
Blue
Red
Blue
Red
Yellow
Green
Yellow
Green
Yellow
Green
YellowBlue
Red
Green
YellowBlue
Red
Green
YellowBlue
Red
Green
Note: Should you need to order additional detectors for an existing installation
and need specific colour-coded detectors, please add the following suffixes to
the part number: Y = Yellow, B= Blue, G= Green, R = Red. (There is normally
no need to specify the colour codes as orders are dispatched with a suitable
colour-code mix.)
Fixing
MLS2421DSM/DALISM - The housing may be secured to a hard surface or a BESA box. The unit fits into
the housing with a simple bayonet action.
MLS2421DF/DALIF - Depth required behind ceiling: 62mm from front flange plus an allowance for the
minimum bend radius of the cable. Sinking box fits into a 89mm diameter hole in ceiling tile or plasterboard
ceiling. To avoid damage to ceiling tile, do not overtighten. No access above the ceiling is necessary.
MLS2421DALIFXAA - The sensor can be secured to the ceiling using the screw provided.
Please note: Do not position this product on a pitch narrower than 5m.
Do not mount within 0.25m of a luminaire.
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Electrical Connections
These Digital Gold detectors should be connected in accordance with the diagrams below. Both the Digital Output
and MLS connections are polarity-free however other MLS products require that polarity be maintained. The MLS
cable should be mains-rated, unscreened, twisted pair of at least 1.5mm CSA. For further information please refer
to Wiring Application Guide AN4001. Please note that UltraLite versions of these detectors (suffix CWL7) do
not offer MLS functionality and cannot be connected using MLS cable.
These detectors are designed to control up to 25 DSI or DALI luminaires, a switched load of up to 6 Amps or a
combination of the two. When controlling DSI or DALI ballasts the ballast type must not be mixed. The DSI or
DALI input terminals on the ballasts should be connected in parallel with each other and to the Polarity-Free Digital
Output terminals on the rear of the detector. Each DSI or DALI luminaire is controlled completely by its digital input
and therefore would normally have a permanent power supply. Turning the power off to some lights within a control
circuit will not have affect the operation of those lights that remain powered up and under the control of the detector.
When switching via the volt-free output multiple detectors may be connected in parallel provided the controlled
load does not exceed 6 Amps. If digital ballasts are also being controlled the digital outputs from each detector
must not be mixed even if they are of the same type.
Wiring Examples
Using OneSwitch, MLS*, Switched
and Digital Outputs
VOLTFREE
OUTPU T
LIVE
NEUTR AL
EARTH
ONESW ITCH
DIMMI NG
(MAX 10 AMPS)
LOAD
Momentary
push-to-make
switch
These Connections are Polarity-Free
Digital
MLS
Output
BUS
1 2 1 2
L
Permanent
or switched
N
supply
E
Please note that the Earth terminal has no internal connection
and is used for termination only.
* UltraLite-version detectors (suffix CWL7)
do not offer MLS functionality and cannot
be connected using MLS cable.
MLS Bus Connection
(Some MLS devices require
that polarity be maintained)
Digital output
Using Switched Output and MLS*
VOLTFREE
OUTPU T
LIVE
NEUTR AL
EARTH
ONESW ITCH
DIMMI NG
2 x MLS2421D In Parallel, using
Switched Output only
VOLTFREE
OUTPUT
LIVE IN
NEUTRA L
EARTH
ONE
SWITCH
NC
NC
LOAD
(MAX 10 AMPS)
VOLTFREE
OUTPUT
L
N
E
LIVE IN
NEUTRA L
EARTH
ONE
SWITCH
These Connections are Polarity-Free
Digital
MLS
Output
BUS
1 2 1 2
NC
Permanent
or switched
supply
Please note that the Earth terminal has no internal connection
and is used for termination only.
LOAD
(Max 10 Amps)
* UltraLite-version detectors (suffix CWL7)
do not offer MLS functionality and cannot
be connected using MLS cable.
MLS Bus Connection
(Some MLS devices require
that polarity be maintained)
Any connection not shown is NO C ONNE CTIO N
Relay outputs may be connected together in
parallel to cover larger areas, however the
total load on all combined relay outputs
must not exceed 10 Amps.
NC
L
Permanent
or switched
N
supply
E
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