-2-
DIMMING CHANNELS
MAINS INPUT
N
L
1
6
5
4
3
2
L
E
N
Introduction
The CDH8U5 is an intelligent LCM providing connections for multiple
luminaires*, up to 5 presence detectors and up to 10 SELV inputs. Provision
is made for 7 switched live outputs plus one volt-free power output. The unit
features a switched output for Maintained Live to allow initiation of
Emergency Lighting Test. In addition, the unit is provided with a volt-free
signalling output to provide control of / interface to other equipment. The
CDH8U5 is designed to simplify installation whilst providing an intelligent
managed lighting system.
Please note that during the installation after the unit is power up and no
detector has been connected (or commissioning has not been done), lights
will be on for 20min and will turn themselves off. Please also note that when
using a MLS2000SSPmk2 with the MLS Network and connecting the lights
directly to the plate instead of to the LCM the command from the RB2000 will
be ignored as it does not get through the CD box.
*Note: Refer to the Technical Data section for the maximum allowable number
of luminaires.
Fixing
The CDH8U5 should be mounted in an enclosure with a DIN-rail.
Consideration should be given to access for installation and maintenance
when selecting the enclosure and location. The external enclosure DIN-rail
should comply with EN 60715.
Electrical Connections
The connections to this equipment should be made only by a suitably
qualified person and in accordance with the current wiring regulations.
A means of disconnection must be incorporated in the fixed mains
wiring to this box in accordance with the current wiring regulations.
All the connections should be routed ensuring adequate strain relief on the
cable before termination to the unit’s pluggable connectors.
CAUTION: DO NOT CONNECT MAINS TO THE MLS BUS OR DIMMING
OUTPUTS.
Connecting the Luminaires
Variants of the CDH8U5 are provided to control DSI
(available on
configuration only),
DALI and 1-10V ballasts. (See Part Numbers section for
more details.)
Note: Dimming Ballast types CANNOT BE MIXED on a single CDH8U5.
The CDH8U5 is equipped with 8 two-wire
pluggable terminals for
(Blue)
dimming outputs and 4 two-wire
pluggable terminals are provided for
(Black)
switched live outputs. Switched Live Outputs 1 through 6 are grouped in pairs
on a single plug to add mechanical strength for plugging/unplugging.
Switched Live Output 7 has two terminals for connecting the load.
Note: Earth and Neutral are connected directly to the luminaire and not
routed through the CDH8U5.
(Black)
(Blue)
Note: + and - relevant for
analogue versions only.
Ballast
Ballast
N
N
L
L
E
E
D
D
D
D
L
E
E
N
N
Loads on Channel 1
Dimming
Dimming
Note: some connectors omitted for clarity
As shown above, one or more luminaires may be connected to each channel
of the CDH8U5.
Note: For the maximum number of allowable ballasts, refer to Technical
Data section.
Connecting Switched Live Output
The CDH8U5 has 7 switched live outputs. As shown in the diagram, the
Neutral and Earth connections should be taken directly to the load.
Each Switched Live output is rated for a load of up to 6A, with a total maximum
switched live load not exceeding 16A for the unit.
Output 8 is provided as a volt-free style for extra flexibility.
Connecting Volt Free and Maintained Live Output
The CDH8U5 provides a 5-way terminal block for connecting mains rated Volt
Free load and Maintained Live output. For wiring convenience, the middle
terminal of the 5-way block is internally linked to the Mains Live input as
shown.
L
E
E
N
N
Ballast
N
L
E
Note: some connectors omitted for clarity
Switched Live
Internal Link
Maintained
Output
External shorting Links