Advertisement
Silver Series LightSpot with photocell
The Silver Series LightSpot is a high performance presence detector with photocell. In all operating modes, the
photocell can hold lights off as a vacant area becomes occupied, and if the light level falls too low during the
period of occupancy, the lights switch on. In 'Passive Mode' the lights do not switch off whilst the area is occupied
no matter how much light is measured. In 'Active Mode' the photocell is able to switch the lights off whilst the area
is occupied.
Fixing
MS1221PSM - The housing may be secured to a hard surface or a BESA box. The unit fits into the housing with
a simple bayonet action.
MS1221PF - Supplied with a sinking (dry lining) box for flush fitting. Sinking box fits into an 89mm diameter hole
in ceiling tile or plasterboard ceiling. To avoid damage to ceiling tile, do not overtighten. Depth required behind
ceiling: 62mm from front flange plus an allowance for the minimum bend radius of the cable. No access above
the ceiling is necessary.
Note: Do not mount within 25cm of a luminaire.
Connection Examples
The MS1221 has two outputs, one influenced by the photocell (R1), the other not (R2). This is useful in
applications where a fan or water is being controlled in addition to any lighting.
VOLT-
FREE
OUTPUT
LIVE OUT
LIVE IN
NEUTRAL
EARTH
Important Additional Notes
1.
Only suitably qualified personnel should install this equipment.
2.
All terminals on this product are provided for final connections. It is not intended that the product be used as a junction box
for looping cables.
3.
A means for disconnection must be incorporated in the fixed wiring in accordance with the current wiring regulations.
4.
This equipment switches lights no more frequently than would a responsible human occupant. However, manufacturers of
some lighting types (e.g. '2D' luminaires) may specify a maximum number of switching cycles and/or a minimum on-time in
order to achieve a predicted lamp life. Please check with the manufacturer of the luminaires to ensure that they are
compatible with automatic controls in this respect.
R2
R2
LOAD 1
(Max 6 Amps)
R1
INFLUENCED
BY PHOTOCELL
LOAD 2
(Max 6 Amps)
NOT INFLUENCED
BY PHOTOCELL
TOTAL LOAD NOT
TO EXCEED 10A
L
N
E
Permanent
or switched
supply
Advertisement
