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
MS1201PSM / 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.
MS1201PF / 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
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.
Multiple Units
Larger areas can be covered by connecting extra units in parallel. The total load current must not exceed 6 Amps
in case only one unit is activated.
N
E
L
Permanent
or switched
supply
VOLT-
FREE
OUTPUT
VOLT-
FREE
OUTPUT
LIVE IN
LIVE IN
LIVE IN
NEUTRAL
NEUTRAL
EARTH
EARTH
LOAD
(Max 6 Amps)
LIVE IN
*
*
*
*
*
The Live terminals are internally linked
External Link
External Link
N
E
L
Permanent
or switched
supply
VOLT-
FREE
OUTPUT
LIVE IN
LIVE IN
NEUTRAL
EARTH
MS1201PF or MS1201PSM
LOAD
(Max 6 Amps)
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.
*
*
External Link
*
The Live terminals are internally linked
N
E
L
Permanent
or switched
supply
VOLT-
FREE
OUTPUT
LIVE OUT
LIVE IN
NEUTRAL
EARTH
LOAD 2
(Max 6 Amps)
NOT INFLUENCED
BY PHOTOCELL
LOAD 1
(Max 6 Amps)
INFLUENCED
BY PHOTOCELL
R2
R2
R1
TOTAL LOAD
NOT
TO EXCEED 10A
R1
R1
EXAMPLE SHOWS
2 x MS1201P
R1
R1
R1
R1
MS1221PF or MS1221PSM
