1 Helvar | Data is subject to change without notice. www.helvar.com The 492 is a single-channel relay unit designed to allow control of non-DALI, nondimmable loads. The relay is a latching, volt-free contact, high-inrush type, with a contact rating of 16 A. The 16 A Power Relay Unit is packaged within a plastic enclosure that can be installed within a luminaire or an electrical cabinet, or used as an in-line unit. This compact enclosure has mounting lugs at each end, and cable grips are an integral part of the terminal cover. The unit is powered from the DALI network. It forms a DALI relay node with a typical current consumption of 2 mA, and it can be programmed as a single-channel relay with Helvar’s lighting design software, Designer and Toolbox. Note: This unit does not contain a DALI power supply. Therefore, one must be present elsewhere in the system. Key Features • 16 A high-current relay • High-inrush specification relay • Compact size for luminaire, electrical panel or in-line mounting • Secure wire connection cover 492 16 A Power Relay Unit 2 Connections DALI consumption: 2 mA DALI cabling must be mains rated DALI: 0.5 mm² – 1.5 mm² solid or stranded Strip length: 8.5 mm – 9.5 mm Relay: 0.5 mm² – 1.5 mm² stranded 0.5 mm² – 2.5 mm² solid core Strip length: 8.5 mm – 9.5 mm Relay Relay contacts: High-inrush, single-pole, singlethrow (SPST) latching relay Isolation: 3 kV Maximum load: 16 A Number of devices: Quantity is limited by MCB: refer to the manufacturer’s data. External protection: External protection must not exceed 16 A type C MCB. Mechanical data Housing: White plastic (polycarbonate) Weight: 52 g IP code: IP30 Operating and storage conditions Ambient temperature: 0 °C to +40 °C Storage temperature: −10 °C to +70 °C Relative humidity: Max. 90 %, noncondensing Conformity and standards DALI: IEC 62386-101 IEC 62386-102 IEC 62386-208 Emission: EN 55015 Immunity: EN 61547 Safety: EN 61347-2-11 Environment: Complies with WEEE and RoHS directives. Doc. D005162, issue 6, 2019-01-09 Helvar 492 16 A Power Relay Unit: Datasheet Technical Data Dimensions (mm) Connections DA+ DANote: The DA+ and DA– wires can go in either of the DALI connectors. DALI wiring Load (relay) wiring 21.2 118 100 110 40 4.4