Thorn SWITCHLITE MRE SLD2 Installation And Commissioning Instructions

Setting the Photocell

1. If the lights are not already on, switch them on manually by pressing the 'up' button of the SENP (96004189).
Fluorescent lights do not reach full output until up to 15 minutes after being switched on, so ensure that the lights are
fully warmed up before continuing. This stage may be omitted if the intention is to operate the detector's photocell
in Passive Mode only [the detector must have already been programmed to Passive Mode].
2. Wait until the time of day when the natural light level is at the point below which you
and above which you would not want the lights to be on.
3. Start the internal self-programming mechanism by pressing the 'Store' button of the SENP. The detector takes a
measurement, adds a small amount and stores the value in the Upper Threshold. Then it turns the lights off, makes
another measurement and stores the value in the Lower Threshold.
acknowledge a successful programming operation.
The two switching thresholds have now been set, and the difference between them is equal to the contribution made by
the electric lighting; this is the perfect amount of hysteresis to ensure that the lights will not oscillate. Please note that
the values are non-specific units i.e. not lx.
Active Mode
Passive Mode
Upper Threshold
Natural
Light
Level
Lower Threshold
Occupancy

Washroom Mode

The unit may be used in conjunction with a 230V solenoid valve and a trickle valve or 'petcock' to effect a urinal flush
system. Set the water flow rate by adjusting the petcock so that the cistern
the detector. Note that in this mode, the photocell should be disabled, unless using the dual output unit.

Technical Data

OPERATING VOLTAGE: 230V 50Hz
RECOMMENDED CIRCUIT PROTECTION: 10A
2
TERMINAL CAPACITY: 2 x 2.5mm
MAXIMUM LOAD: 6A per output [not exceeding 10A in total]
MAXIMUM RECOMMENDED MOUNTING HEIGHT: 3 metres
RANGE: Cone-shaped detection
pattern, diameter (at floor level)
= 2.4 x mounting height
PHOTOCELL: Adjustable 50-5000 lx via SENP (96004189)
OFF DELAY 1 & 2: 1 minute - 96 hours adjustable (5 - 35 minutes via SENP) and 10 second Walk Test Mode
COLOUR: White
MATERIAL: Flame retardant ABS
WEIGHT: 200g approx
IP RATING: 40
POWER CONSUMPTION: <10W
want the lights to be on,
would
The lights now switch on again to
Lights ON = Lights OFF =
Note that when the natural light
level exceeds the 'upper threshold'
value, the lights do not immediately
Duration of
turn off. They will turn off only when
Off Delay
the upper threshold has been
exceeded for the duration of the
programmed Off Delay.
Area Occupied =
Area Unoccupied =
just fills within the chosen Off Delay period of
Dimensions
62mm
deep
(behind ceiling)
2.5m
6.0m
100mm
Switchlite Dual Circuit detectors, ceiling
mounted, recessed (MRE) or surface (MSF)
(formerly known as S3D2PF and SD2PSM)
Note: SENP Programmer (96004189) reqd. for commissioning
10mm deep
(Flange)
Thorn Lighting Limited
www.thornlighting.com
SWITCHLITE MRE SLD2 (96013492)
SWITCHLITE MSF SLD2 (96013493)
MRE
MSF
Installation and Commissioning
Instructions
User override available via SENRC
Hand-held Controller (96004175)
At the end of their useful life
the packaging and product
should be disposed of via a
suitable recycling centre.
Do not dispose of with normal
household waste.
Do not burn.
W4235B