Timers & Controls
Setting the scene with DALI
Modern building interior
Though most electrical wholesale customers will have come across DALI during the course of their work, many may have thought it was only for the big contractors buying direct on the big jobs, and so would not look for them on the counter. Whilst this might have been the case in the past, Timeguard’s new line-up proves that DALI controls and devices are more than ready for the mainstream wholesaler channel.
T
his season, Timeguard is adding its brand name to the field – but with a twist that can boost expansion into
the more complex, networked lighting control that home and business owners have increasingly come to expect. Timeguard has launched a line-up of DALI- compatible PIR controllers with controller, power supply and remote IR controllers, providing everything installers need to get started – as well as take things to the next level. After all, most installers are already familiar with providing homeowners and businesses with zoned lighting and scene setting. If, however, a project is not yet ready for DALI, or simply doesn’t warrant it, then the new Timeguard PIRs can also be used as stand-alone switches with daylight harvesting functions. This
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allows customers to remain in control of their choices, changing only as much and as quickly as they want.
DALI The Digital Addressable Lighting Interface (DALI) is a standard that enables different devices on a system to talk to each other – and they don’t even need to come from the same manufacturer. This international standard was specifically created for lighting, for a two-way communication system that gives easy control and versatility. In a traditional system, control signals are one-
way. In a DALI system, signal traffic is two-way, meaning LEDs can be commanded to perform requested actions, such as switch ON/OFF or DIM, but can also be asked to provide
information. The LED driver or switch can provide, for instance, information about intensity and energy consumption, or it can simply verify that it is working. A DALI network consists of a controller, a
power supply (which may be built into the controller) and one or more slave devices (ballasts, drivers, dimmers and PIR detectors to name a few) that have DALI interfaces. Naturally, it will require a DALI bus for communication between different points on the system such as the controller and a PIR. So, an extra pair of cables between devices and control points of the system is needed; and a standard 2- core, minimum 1.5mm2 is sufficient. Additionally, a DALI loop can contain up to 64 devices – typically LED drivers or PIRs - with multiple loops linked together for larger projects.
●Continued over December 2018 electrical wholesaler | 23
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