Installation
This photocell is suitable for flush fitting to a suspended ceiling of thickness up to
54mm. If it is to be fitted into a plasterboard ceiling, a PB64 (Plasterboard Fixing
Kit) should be used - contact Ex-Or for details.
A minimum clearance of 125mm is required between the front surface of the
ceiling tile/plasterboard and the end of the ceiling void.
Choose a suitable mounting location; ideally this would be within the area of the
controlled lighting at the furthest point from all sources of natural light.
Note: Do not mount within 0.25m of a luminaire.
To mount in a suspended ceiling, cut a hole in the ceiling tile using a 50mm hole
saw. Feed the MP2000UF into the hole and secure in position with the locking
ring.
For plasterboard mounting please refer to the dedicated PB64 installation
instructions.
Connection
Connect the MP2000UF in accordance with the diagram below observing the
following:
This equipment must be installed only by a suitably qualified person.
A means for disconnection must be incorporated in the fixed wiring in
accordance with the current wiring regulations.
Although nominally 12V, the dimming output is not SELV, and as such,
should be treated with the same respect as mains with regard to wiring
practice. The 0V line of the dimming output is connected internally to the
Neutral supply.
Press send
in the ‘Set
Light Level’
menu
Operation
continues
Lights ‘blink’
to show
successful
operation
Create required
ambient light
level using
HP2000 and lux
meter
Dimmable
(DSI, DALI, Analogue 1-10V)
Photocell Commissioning Flow-chart
Snapshot taken
by MP2000UF
with lights ON.
Value stored in
Set Point L
25% added to
value in
Set Point L.
New value stored
in Set Point H
Select
Ballast Type
using HP2000
(Factory Default
DSI 1%)
Regulating
light level set
successfully
Turn
ON
lights
No
Non-dimmable
Snapshot taken
by MP2000UF.
25% added to
value and stored
in Set Point H
New snapshot
taken and stored
in Set Point L
Switching
level
configured
successfully
Are
controlled
luminaires
ON?
Yes
Press send
in the ‘Set
Light Level’
menu
Create
required
ambient
light level
Lights
turn
OFF
Lights
turn
ON
BLACK CABLE:
Yellow - Dimming Control + ve
Green - Dimming Control - ve
115mm
65mm
MP2000UF
WHITE CABLE:
Brown - Live
Blue - Neutral
Green/Yellow - Earth
(no internal connection)
Black
Grey
Volt-free Output
6A Max
Electrical Connections
Commissioning - Dimming Photocell
The light level should be set using an HP2000. Select the ‘Set Light Level’ menu
item and adjust the light output of the luminaire to the approximate required lux
value using ‘Up’ and ‘Down’ as necessary. Once the correct light level is
achieved press ‘Send’ to store that level. See flow-chart.
Commissioning - Switching Photocell
Commissioning should be carried out at the time of day when the ambient light
level is near the desired switching level. If this is not practical, the desired light
level can be created by opening/closing curtains/blinds and by turning
uncontrolled luminaires on or off as required. Pressing SEND on the HP2000 will
store a snapshot of the light level.
There is a green LED on the front bezel to aid commissioning in Non-Dim mode.
The LED will be on when the MP2000UF requires more light. This is useful
because the relay may not be responding instantly to light level requirements
due to the passing cloud timer.
Note
Due to the fact that the photocell is on the ceiling looking down, it is not possible
for measurements made with a lux meter on the working plane to remain
constant when daylight illuminates the ceiling and the working plane to a different
extent. Therefore, products of this type should be regarded as being capable of
maintaining an APPROXIMATE light level only.
Light levels should be measured using a lux meter and commissioned at table
height, preferably without daylight contribution (i.e. at night).
After commissioning has taken place, the values stored in Set Point L and Set
Point H can be adjusted using the HP2000 if required. Please refer to the flow-
chart below and the default parameter values overleaf for further commissioning
information.
Specification
Operating Voltage: 230V 50Hz
Power Consumption: <10W
Volt-free Contact: 6 Amps max. Any type of lighting load
o
Ambient Temperature Range: 0 - 40 C
Ballast Control Type: Single master; no other masters to be connected
Ballast Control Capacity: 25 max (1-10V, DSI, DALI Ballasts - select via HP2)
Photocell Sensitivity: 0 - 5000 Lux (with a 20% reflective workplane)
Recommended Mounting Height: 2.4m
Maximum Mounting Height: 6.0m
Material: Flame Retardant PC/ABS
IP Rating: 4X
Weight: 350g
Compatible with optional HC5 or HC6 Hand-held Controller
MP2000UF Universal Photocell
ImportantAdditional Notes
1. The dimming control output should be connected only to the control input of the
ballasts - never to other detectors.
2. This equipment should be used to control only those ballasts powered from the
same phase as the detector.
3. 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 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.
W4142F
