CDH8U5
8-Channel Programmable
Intelligent Lighting Control Module
Installation and Commissioning Instructions
Installation and Commissioning Instructions
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.
*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.
L
Loads on Channel 1
Ballast
Dimming
Ballast
Dimming
E
L
N
D
D
E
L
N
D
D
E E
N N
L1
Note: + and relevant for
analogue
versions only.
MAINS INPUT
N
DIMMING CHANNELS COMMS BUS
B A B A B A B AB A
B COM A B COM A
12 11 10 9 854 3 2 1
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
L
5
4321 1 21 2
SELV SWITCH INPUTS DETECTOR PORTS
B COM A
5
7 7
3
6
421
87
6
B COM A
B COM A
5
4 3 2 1
8
ML
LIVE
N/C COM N/O
AUX 1
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.
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.
N
E
L
2
MAINS INPUT
N
3
4
DIMMING CHANNELS
1
L
5
7
6
Connecting the Luminaires
Variants of the CDH8U5 are provided to control DSI, 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 dimming
outputs and 4 two-wire pluggable terminals are provided for 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.
Connecting Switched Live Output
L
E E
Ballast
E
L
N
N N
L1
MAINS INPUT
N
DIMMING CHANNELS COMMS BUS
B A B A B A B AB A
B COM A B COM A
12 11 10 9 854 3 2 1
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
L
5
4321 1 21 2
SELV SWITCH INPUTS DETECTOR PORTS
B COM A
5
7 7
3
6
421
87
6
B COM A
B COM A
5
4 3 2 1
8
ML
LIVE
N/C COM N/O
AUX 1
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
Maintained
Output
Switched Live
MAINS INPUT
L
N
3
4
21 1 21 2
DIMMING CHANNELS MLS
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
5
5
3
7
6
6
421
8
7 7
External
Shorting
Links
8
LIVE ML
Note: Earth and Neutral are connected directly to the luminaire and not
routed through the CDH8U5.
Internal Link
B A B A B A B AB A
12 11 10 9 8
SELV SWITCH INPUTS DETECTOR PORTS
B COM A B COM A
5
B COM A
B COM A
4 3 2 1
B COM A
5
4 3 2 1
N/C COM N/O
AUX 1
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.
-2-
Switched Live
Live in from
same Phase
External
Shorting
Connecting Switches with High Density Connector
Maintained
Output
Link
MAINS INPUT
L
N
5
3
4
21 1 21 2
DIMMING CHANNELS MLS
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
5
3
421
7
8
6
7 7
6
8
LIVE ML
Internal Link
B A B A B A B AB A
12 11 10 9 8
SELV SWITCH INPUTS DETECTOR PORTS
B COM A B COM A
5
4 3 2 1
B COM A
B COM A
B COM A
5
4 3 2 1
N/C COM N/O
AUX 1
The diagram above shows Maintained Live generated from the internal link of
the mains supplied to the unit. Alternatively, the external shorting link can be
removed and an external supply (from the same phase) can be connected to
create a Maintained Output.
Connecting Presence Detectors
The following SELV detectors are designed to interface to the CDH8U5:
MLS2500CDR Corner-mount Microwave presence detector with
photocell, semi-flush mounted. Available with surface
mount (SM suffix).
MLS2401CDR 360° Microwave presence detector with photocell, flush
mounted. Available in surface mount version (SM suffix).
MLS2001CDR 360° PIR presence detector with photocell, flush mounted.
Available in surface mount version (SM suffix).
MLSM2002CDR Controller for a 360° PIR detector with photocell. Used
with the DHS OR DHW mini-head to form an integral
luminaire-mounted unit.
Each connects to the CDH8U5 by means of an Ethernet-style RJ45 connector
terminated patch lead which are available ready-made in 3m, 5m and 10m
lengths. Up to five detectors may be connected to a CDH8U5.
Positioning Presence Detectors
For information on installing and positioning detectors, please refer to the
installation instructions provided with the particular detector.
The CDH8U5 also has provision to connect 5 additional SELV switch inputs in
order to meet the requirement of additional inputs. Unlike the 3-pole connector,
this provides two terminals A&B for each of the 5 inputs. The high density input
plug (not supplied) can be ordered using the code CDHHDIP.
Note: For the switches on the High Density Connector (SW 8-12) use any of the
‘C’ common connectors from switches 1-5.
Wiring for HD SELV Input:
B A B A B A B AB A
12 11 10 9 8
SELV SWITCH INPUTS DETECTOR PORTS
B COM A B COM A
5
4 3 2 1
B COM A
B COM A
B COM A
5
4 3 2 1
N/C COM N/O
AUX 1
For HD switches 8-12, use any of the ‘COM’ connections from switch inputs 1-5.
Connecting SELV Output, Aux 1
The CDH8U5 has a single SELV change-over output for signalling purposes
only. This can be used to signal an external system e.g. BMS. Connection is
made via a 3-pole pluggable terminal block (supplied) of the same type used for
SELV inputs 1-5 (CDHIP).
MAINS INPUT
L
N
3
4
21 1 21 2
DIMMING CHANNELS COMMS BUS
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
5
5
3
7
6
6
421
8
7 7
8
LIVE ML
Connecting Switches
The CDH8U5 is equipped with SELV switch inputs which will typically be two
way, centre off, momentary rockers,(e.g. the MK K4900 range). The logical
function of a switch can be configured from a wide range of options and its
action can be associated with any combination of channels. The switch
connection consists of a 3-pole pluggable terminal block comprising a
common and two returns from normally open contacts. Six plugs are provided
with each CDH8U5. The plug type is common with the Aux output channel.
Additional plugs can be ordered using the code CDHIP (5 pieces per pack).
Note that if the SELV status of any one of the switches
is compromised by reason of inadequate insulation or
segregation of the cabling, then the SELV status of all
other switches AND OF THE DETECTORS will also be
compromised.
A
Com
B
The recommended cable for use with the SELV switches is 3-core 300/500v
0.75mm² cable to CMA Reference 3183Y or for LS0H, to CMA Reference
3183B. The maximum allowable cable length between the switch
mechanism and the CDH8U5 terminal block is 100m.
Three separate single wires should not be used.
B A B A B A B AB A
12 11 10 9 8
SELV SWITCH INPUTS DETECTOR PORTS
B COM A B COM A
5
4 3 2 1
B COM A
B COM A
B COM A
5
4 3 2 1
N/C COM N/O
AUX 1
External BMS
Signal In
24V AC/DC
Note: The external voltage connected to Aux 1 must never exceed 24V
AC/DC. The SELV Output must be used only for signalling purposes.
Maximum current shall not exceed 1A.
Connecting the Communications Bus (MLS)
It is imperative that the MLS Bus be wired in the correct type of cable. Normally
it should be 1.5mm unscreened twisted pair. See Application Note AN4001.
2
Do not connect Mains to the MLS Bus.
MAINS INPUT
L
N
3
4
21 1 21 2
DIMMING CHANNELS
SWITCHED LIVE OUTPUTS VOLT FREE CHANNELS
5
5
3
7
6
In In
6
421
8
Out Out
7 7
COMMS BUS
8
LIVE ML
MLS Bus 1 MLS Bus 2
For connection of Bus Power Supply variants, see also Supplementary
Installation Instructions W5071.
W5054E
-3-
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