MLSUCA MK2 INSTALLATION GUIDE
Doc:50054519-001 Rev. B
Ex-Or, Novar ED&S Ltd
Haydock Lane, Haydock, Merseyside, WA11 9UJ
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MLSUCA MK2 Product Descri pt ion
The MLSUCA MK2 is an embedded controller/web-page server for remote monitoring and control
of Ex-Or Digital Managed Lighting Systems, (MLS Systems). It also has the capability of
presenting its status information and receiving commands in BACnet protocol form.
As a controller/web-page server exclusively for the Ex-Or MLS System it is able to control and
display up to 700 lighting zones spread over a number of Ex-Or RB2000/MLS Bus served areas of
a building or campus. With the inclusion of the BACnet capability it is able to serve 450 lighting
zones.
For the lighting control and lighting status display application the MLSUCA MK2 takes the role of
Bus Master on the RS485 Spine linking a number of RB2000s each of which drives an MLS Bus
capable of supporting up to 100 separate lighting zones comprised of up to 200 individual
presence detectors with photocells.
Control functions in the lighting application can be either pre-programmed actions governed by an
onboard time-of-day clock or manual interventions delivered via the supported web-page from any
co-networked Personal Computer running a web-browser. With the BACnet capability installed
real-time control actions can also be initiated by remote BMS devices.
Conversely via the BACnet protocols information gathered by the lighting system’s detectors,
typically occupancy data, can be passed to other BMS disciplines.
System Overview
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Technical Data
Construction: Plastic, screw mount chassis with plastic cover.
Enclosure rating IP40 – designed for indoor use only.
Overall Dimensions: 197mm (W) x 321mm(H) x 58mm (D)
Weight: 1.36kg
Power supply: 90-240V ~ 50-60Hz universal PSU.
Cooling: Internal air convection.
Wiring access: 21.5mm hole provided at top and bottom of case.
Knock-outs in base of case for hidden wiring.
Segregat ion of mains and signal wiring provided for.
Operating
Temperature Range: 0°C to 50ºC
Relative Humidity: 5 to 95% at 25ºC, non-condensing.
MLSUCA MK2 Mounting and Wiri ng Instructions for MLS System Applications
Preparing the MLSUCA MK2 for Fixing
The MLSUCA MK2 should be mounted on a rigid surface with its long axis vertical and the two
screw mounting tabs at the bottom. This allows a proper flow of cooling air through the enclosure.
Overheating may result from mounting it in any other orientation.
Before fixing it is recommended that the wiring scheme is carefully planned. If it is intended to use
the rear-face knock-outs for cabling through e.g. a cabinet chassis-plate, first remove the righthand cover as shown in Fig1 below.
With the right-hand cover removed the circular knock-outs in the floor of the cable chamber can
now be seen. Removing the AC Power Wiring Shield reveals an additional oval slot for the
segregated entry of the power cable.
To remove a knock-out hold the unit with the cable chamber side on a firm, flat surface, as shown
in Fig 2-1a and, from the back of the unit, wedge a straight bladed screwdriver into the knock-out
edge. Twist the blade to pry the knock-out disc inwards, as in Fig 2-1b. Now turn the unit right way
up and push the displaced knock-out disc upwards, see Fig 2-2, disengaging it f in a lly by twist ing it
free.
In addition to the rear knock-outs, there are two 21.5mm diameter wiring holes provided, one at
the top and one at the bottom of the cable chamber, for general low voltage circuit wiring. If the
upper 21.5mm diameter hole is to be used a “U” shaped knock-out must be removed from top of
the right-hand cover.
There is a single 22mm diameter hole, compatible with a 20mm trunking bush, immediately
adjacent to the Mains Input Terminal Block, for segregated routing of the mains supply cables.
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Fig. 1. Right Cover Removal.
Fig. 2. Location and removal of knock-outs
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Fixing the MLSUCA MK2
Once the cable routes have been opened in the unit enclosure they can be copied in the chassisplate, if one is used, and the unit can be mounted on the supporting surface. Fig 3 shows the
steps involved in emplacing a suitable pan-head woodscrew (No.8), for wall fixing, or cap bolt
(M5), for plate fixing, to engage with the keyhole support near the top of the back of the unit’s
enclosure, When the unit has been levelled, two further pan-head woodscrews (No.8 ) or bolts
(M5) are inserted through the mounting tags at the base of the unit to steady it.
Fig. 3. Fixing Centres and Methods
The Mains Power Connections
If not already removed for earlier operations, remove the right-hand cover of the unit. Remove the
shield over the three-way mains terminal block and retain it for later replacement. Route the Live,
Neutral and Earth cables into the unit enclosure either through the oval knock-out, from behind a
chassis-plate, or via conduit, through the circular cut-out provided immediately below the mains
terminal block. See Fig 4. In either case the mains cabling should not be allowed to pass through
the main cable chamber of the MLSUCA MK2 enclosure.
After connecting the mains supply cables replace the shield over the mains terminal block. If the
mains cables have been routed through the oval knock-out a blanking plug should be inserted into
the circular cut out.
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Fig. 4 Alternative entry routes for Mains Wires.
IMPORTANT NOTE: A means of disconnection must be incorporated into the fixed wiring in
accordance with the current wiring regulations.
Connection to the RB2000 S pine
The MLSUCA MK2 is supplied with a 120ohm (120R) resistor inserted into each of the two threeway cable sockets provided for connection to the bus cabling of the RB2000 Spine. These allow
the MLSUCA MK2 to terminate the two RS485 buses if the MLSUCA MK2 is to be the last device
on one end of the bus. However if the MLSUCA MK2 is to be connected with at least one RB2000
between it and each of the ends of the Spine bus lines, then these resistors must be discarded.
Fig. 5. Connection to the RB2000 Spine.
The MLS U C A MK 2 assumes the role of Bus Master on the RB2000 Spine. This means that all the
RB2000s should be given non-zero addresses.
The last unit at each end of the chain should be configured to terminate the two RS485 signal
pairs, A-B and Y-Z. In the case of an RB2000 being the last device this is simply a matter of sliding
the switch behind the address setting switches to the ON position.
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Network Connection
Connection to the building services network is made by means of a straight-through, CAT5E patch
lead from the upper “LAN1” RJ45 socket to a fixed network access socket. The unit comes with a
fixed IP address which the LAN administrator can change. Default IP address is 192.168.1.12n
where n is the same as the last digit of the units serial number which can be found on the carton’s
label. Details of the IP configuration can be found under the commissioning section.
Power Up and Initial Checkout
Apply power to the MLSUCA MK2. The top green “STATUS” LED will light.
This indicates that the MLSUCA MK2 has powered-up internally. There follows a “boot sequence”
of up to 30 seconds duration during which the MLSUCA MK2’s microprocessor configures the
system before commencing to blink the yellow “BEAT” LED at a steady rate of about once a
second.
If, after applying power, the STATUS LED goes out, or if the yellow BEAT LED comes on (steady)
and stays on for longer than two minutes, power the MLSUCA MK2 down and seek technical
assistance.
Documenting the wiring pl a n
The next stage after installing the unit is commissioning. This requires knowledge of the wiring
plan.
It is therefore important to pr ovide this information preferably using the architectural plans provided
prior to installation. This should include the following when handing over and getting sign off with
the client, but it must be noted that these assume ideal circumstances and that an architect has
available such plans.
• RB2000 locations
• Zones and their respective RB2000 address must be clearly marked.
• The Ballast type and timeout period should also be listed.
• Zone identities. Such as room names or numbers
Some of this information may only be available from those who commission the MLS lighting
control system which may or may not be an Ex-Or commissioning Engineer.
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