The CCU1 family:
The CCU1 is powered directly from the mains and supplies a switched Live output to control the lights. It uses occupancy and light level sensing to ensure that lighting is switched on only when an area is occupied and the light level is too low. The units can be overriden and configured using an I.R. control system. Each controller has its own microprocessor and associated non-volatile memory so that the configuration settings may be changed at any time and re-stored without being affected by power loss or mains fluctuations. The power control relay is capable of controlling up to 8 amps of inductive loading safely and securely with complete isolation when off.

The coverage of the PIR and the switching capability make the CCU1 most suited to small rooms or offices. A typical installation would be above a desk in an office, in the centre of, and controlling, four luminaires directly.

Fitting Variations
The CCU1F is a flush fitting unit for mounting directly into ceiling tiles from 2mm to 20mm thick with a single 54mm mounting hole. It is supplied as standard with 2 metres of three way mains cable. All F variants can be modified to a K with a spring Klip kit to allow for single sided fitting. The CCU1S is for surface mounting and comes complete with a receptacle fitted with a standard 20mm round conduit entry. The receptacle is mounted on the ceiling and wired in before the CCU1S is plugged into place. The CCU1S has also been designed so that it can be pushed home or removed even when the mains are on. The connections for both versions are Mains Live, Mains Neutral and Switched Live.

Other Variations
The CCU1F/VF is a flush fitting unit that has Volt-Free contacts for operating circuitry other that the circuit which supplies mains to the unit, e.g. another supply phase or low voltage. It is only available in the ‘F’ fitting and has a four way cable with connections of Mains Live, Mains Neutral, Common and Normally Open.

All the above units use the 8 Amp inductive load heavy duty relay.

The CLC1F is a flush fitting unit that has Volt-Free contacts for operating circuitry other that the circuit which supplies mains to the unit, in this case normally low voltage and/or low current. This is primarily to cover the inability of the 8 Amp relay to switch currents below 100mA reliably. The relay used will handle 2 Amp @ 30V or 100mA @ 230V mains. It is only available in the ‘F’ fitting and has a four way cable with connections of Mains Live, Mains Neutral, Common and Normally Open.


The CWU1 family:
The CWU1 is powered directly from the mains and supplies a switched Live output to control the lights. It uses occupancy and light level sensing to ensure that lighting is switched on only when an area is occupied and the light level is too low. The units can be overriden and configured using an I.R. control system. Each unit has its own microprocessor and associated non-volatile memory so that the configuration settings may be changed at any time and re-stored without being affected by power loss or mains fluctuations. The power control relay is capable of controlling up to 8 amps of inductive loading safely and securely with complete isolation when off.

The coverage of the PIR and the switching capability make the CWU1 most suited to corridors or medium size rooms or offices where high sensitivity is not as important as sheer distance. A typical installation would be in a corner of a classroom facing the door controlling the classroom lights, normally all together, or in two rows as with CWU1/2. A novel installation is that where CWU1 devices are mounted on their backs on a ceiling above aisles in a warehouse.

The CWU1/1 connections are Live, Neutral, Common and Normally Open (N/O). An internal link supplies Live to the N/O. If this link is cut then the contacts become volt free.

Two Zone Variation CWU1/2
This version of the CWU1 has been designed for the control of two zones by light level. This may be used for a room with windows on one side only e.g. a typical classroom. The zone furthest from the windows is set to come on at a higher light level than the zone by the windows to equalise the lighting across the room.Therefore, this unit has two relays each capable of 8 Amps inductive load switching. In the evening as the light started to fade the inner lights would come on first and as the light level fell further the outer lights would then come on.

Fitting
The CWU1 is fitted either directly into the corner between two walls, or at an angle on one wall, or flat to the wall simply using knockouts provided in the back of the case. For best detection results it is recommended that the unit be mounted at, at least 2 metres above the floor level.

The CWU1/2 connections are Live, Neutral, Common 1, Normally Open 1 (N/O1), Common 2 and Normally Open 2 (N/O2). An internal link supplies Live to the N/O1. If this link is cut then these contacts become volt free. The second contacts are volt free already.

The ELC1
The ELC1 with its many variations is suitable for almost any exterior lighting situation ranging from a porch light to a large open car park. It uses light level sensing to ensure that lighting is switched on only when the light level is too low. The unit can be overriden and configured using an I.R. control system. It can cope with either direct mains control or be linked into a BEMS system, whichever is required. It comes in many different versions to ensure compatability with whatever customer conditions dictate. The primary version is powered directly from the mains and supplies a volt-free contact output capable of handling 8 Amps of inductive loading at mains potential. Low voltage supply versions of 12 or 24 volts either A.C. or D.C.can also be supplied, again with the high current relay, or, more likely for computer control, a low voltage relay with gold plated volt-free contacts to handle low power switching currents. Each unit has its own microprocessor and associated non-volatile memory so that the light level setting may be changed at any time and re-stored without being affected by power loss or mains fluctuations.

Fitting
The ELC1 is designed to be mounted with its base flat on a wall. The light level detector is required to face downwards to avoid direct sunlight, therefore the lens is on the side of the unit. The case, which is IP65 rated, has two fixing lugs for screwing directly to the wall and a gland cable clamp to prevent water ingress. The screw top has a flexible O-ring to also give a water tight seal. Two plug-in connectors are provided. The first connector provides power to the unit and is marked Live and Neut(ral) on the pcb (on a low power unit this would not be mains so please, when wiring, consult the instruction sheet), and the second connector is for the volt-free normally open relay contacts.

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