Sygno-fi SYG-DHR | Wireless Magnetic Door Holder | 200N Force

FAQs

How long do the batteries last in the SYG-DHR door holder?

The SYG-DHR operates on two CR123A lithium batteries with a typical lifespan of 5 years under normal operating conditions. This extended battery life significantly reduces maintenance requirements and ensures long-term reliable operation. The use of standard, readily available CR123A batteries means replacement cells are easy to source when required.

Can the SYG-DHR be used with conventional fire alarm systems?

Yes, whilst the SYG-DHR is designed primarily for the Sygno-fi addressable wireless system, it can also function as a conventional device when used with the Sygno-fi Conventional Expander Module (SYG-CEM). This versatility allows integration with almost any type of fire alarm system, making it suitable for both new installations and retrofit applications onto existing conventional panels.

What is the wireless communication range of the door holder?

The SYG-DHR achieves wireless communication ranges up to 1km in open air conditions, operating on the 868-870 MHz frequency band with 14dBm maximum radiated power. In real-world building environments with walls and obstacles, the effective range will be reduced but the dual channel redundancy and 22 pairs of field channels ensure reliable communication even in challenging radio frequency environments.

What does BS7273-4 Category B compliance mean?

BS7273-4:2015 Category B compliance indicates the door holder meets British Standard requirements for automatic door release mechanisms connected to fire alarm systems. When the SYG-DHR is linked directly to a Sygno-fi translator, it achieves this Category B classification, ensuring the device will release fire doors reliably upon fire alarm activation in accordance with UK building regulations and fire safety codes.

How is the door holder commissioned and programmed?

The SYG-DHR features an easy scan and link programming option that simplifies the commissioning process. Rather than complex manual configuration, installers can use the straightforward scan and link procedure to add the device to the Sygno-fi wireless network. This user-friendly approach reduces installation time and minimises the potential for configuration errors during system setup.

What is the holding force and is it sufficient for fire doors?

The SYG-DHR provides 200 Newton holding force, which is adequate for most standard fire door applications. This holding force is achieved through precision magnet technology that ensures consistent performance throughout the battery life. The magnetic retention keeps fire doors securely held open during normal operations whilst allowing immediate release when the fire alarm activates.

Can the door be released manually without the fire alarm activating?

Yes, the SYG-DHR includes a local door release button that allows manual override. This enables building occupants or maintenance personnel to release the door when needed without triggering the fire alarm system. This feature is particularly useful during maintenance, testing or when temporary door closure is required for operational reasons.

What certifications and approvals does the SYG-DHR hold?

The door holder is certified to EN1155 for electrically powered hold-open devices, EN54-18 for fire alarm input/output devices, and EN54-25 for components using radio links. It meets BS7273-4:2015 Category B requirements when directly linked to a translator. The device is also third party approved and won the Security & Fire Excellence Awards 2022 for Hardware Product Innovation of the Year.