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Power Supply Units

Power Supply Units

Fire alarm power supply units (PSUs) are a crucial component of ancillary fire alarm systems, providing the necessary electrical power to ensure their continuous and reliable operation. In accordance with the Regulatory Reform (Fire Safety) Order 2005, all business and public premises in the UK are legally required to have functional fire alarm systems in place to protect occupants and property from the risks associated with fire.

Given the high voltage required for fire alarm systems to operate effectively, they must be connected to the main electrical supply to ensure a consistent and stable power source. This is where the power supply unit (PSU) plays a vital role, delivering the necessary electrical current to keep the system running at all times.

To further enhance reliability, most PSUs are equipped with an integrated battery backup system. This feature is essential in the event of a power failure, as it ensures that the fire alarm system remains fully operational, providing critical protection even during unexpected electrical outages. By maintaining functionality in all circumstances, the PSU helps to uphold safety regulations and safeguards lives and property against the dangers of fire.


C-Tec XFP501/PSU Replacement XFP Power Supply Unit - 24v 3A V2
Manufacturer: C-Tec
Carrier ABT-PSM48E Power Supply Manager Loop Board
Manufacturer: Carrier (UTC)
Carrier KTP-12DCU Switching Power Supply 1A 12 VDC – European Power Cord
Manufacturer: Carrier (UTC)
Carrier KTP-12DCU-UK Kalatel 12VDC 1000mA PSU - UK Lead
Manufacturer: Carrier (UTC)
Carrier POC252-1CX-1P 1-Port Power And IP Over Coax With PoE-AT
Manufacturer: Carrier (UTC)
Carrier POC252-1CXP-1T 1-Port Power and IP Over Coax With POE-AT
Manufacturer: Carrier (UTC)
Carrier PS48VDC100W-DIN 100-240V AC Input 48VDC 100W Power Supply With DIN Rail Mount
Manufacturer: Carrier (UTC)
Carrier PS48VDC240W-DIN 100-240V AC Input 48VDC 240W Power Supply With DIN Rail Mount
Manufacturer: Carrier (UTC)
Carrier PS48VDC480W-DIN 100-240V AC Input 48VDC 480W Power Supply With DIN Rail Mount
Manufacturer: Carrier (UTC)
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