SEMICONDUCTOR giant Arm has unveiled the UK’s biggest lighting installation based on Power-over-Ethernet at its new £90 million head office in Cambridge.
In all, some 6,000 luminaires are energised and controlled using Cat6 cables at the 19,000 square-metre HQ, which houses 2,500 staff.
The control protocol is DALI and, as it’s all phase dimmed from a single infrastructure, it gave the lighting designers flexibility in the selection of light sources.
The lighting is integrated with sensors, switches and scene panels, enabling optimised occupation, illuminance and scene control with an equivalent performance to any sophisticated DALI system.
The luminaires are run at 56V, daisy-chained together and connected back to 3 KW PoE switches from Prolojik.
All data cabling has been designed to ensure optimum loading.
A unique feature of Prolojik’s Lightmatrix is its ability to support emergency lighting. Working with the ICEL (Industry Committee for Emergency Lighting) approved partners LitePlan and ELP, the self-contained emergency lighting for three-hour emergency autonomous operation is automatically tested and reported on over the PoE network.
The building deploys over 1,000 of Prolojik Proxima Bluetooth LBS (Location-Based Services) multi-sensors, which are networked through 30 Bluetooth hubs.
The sensor network supports lighting management with occupancy and illuminance data, and enables insights into detailed space usage.
The technology allows wayfinding, meeting room booking and targeting messaging of staff in various locations.
The system directly integrates the lighting data with third-part systems. The ability to use the occupancy data to achieve both lighting energy saving, as well as share the data over BACnet/IP is one such benefit.
This optimisation halves the number of installed sensors and reduces the build cost without compromising the building functions.
The buildings uses multiple BACnet/IP gateways to share occupancy data with the BMS over the services ICT networks.
The interior fit-out – including the lighting – was designed by Hilson Moran.