The Bosch PRA-PSM24 Power Supply Module 24V is a professional-grade power supply designed specifically for public address and voice alarm infrastructure, including PRAESENSA and PAVIRO systems. Delivering a stable 24-28V DC output at up to 10A, this compact unit ensures trusted power delivery for system controllers and essential devices within commercial AV setups.
Bosch PRA-PSM24 Power Supply Module 24V Manufactured by Delta Power Supply as an OEM solution for Bosch, the PRA-PSM24 offers a cost-effective alternative to the PRA-MPS3 multifunction power supply when battery backup, EN-54 certifications, and additional supervisory features are not required. This makes it the ideal choice for non-evacuation systems or installations where backup power is provided externally.
Housed in a DIN-rail mountable enclosure, the power supply offers universal mains input with power factor correction, maximizing usable power drawn from a single-phase distribution network. A secured 3-pole screw plug ensures professional installation inside a protected cabinet or enclosure, preventing accidental disconnection or tampering.
Designed with operational safety and system protection in mind, the Bosch PRA-PSM24 includes:
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Over-voltage protection with auto recovery
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Over-load protection with auto recovery
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Over-temperature protection with auto recovery
For redundant operation, two units can be connected to a single PRAESENSA system controller — one to input A and the other to input B — ensuring uninterrupted system performance. The supply with the highest voltage automatically becomes the active source while the second stays on standby.
Suitable for powering PRAESENSA system controllers, PAVIRO controllers, and routers, the PRA-PSM24 brings efficiency, protection, and installation flexibility to professional PA system designs.
🔸 Bosch PRA-PSM24 Power Supply Module 24V Key Features
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Continuous 24V DC / up to 10A power output
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DIN-rail mountable compact housing for control cabinets
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Universal mains input with power factor correction
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Safe professional wiring with secure screw-terminal input
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Adjustable 24–28V output range
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Compatible with PRAESENSA & PAVIRO systems
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Triple safety: over-voltage, over-load, and thermal protection
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Supports redundant PSU configuration for fail-safe operation
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Cost-effective alternative to PRA-MPS3 for non-battery-backed use






Madhan Kumar –
I recently purchased Praesensa Power supply module from Bosch.
Excellent product.Sleek Design.
I am very happy with the prodct. Thank you Sakthi AV Tronics.
Madhan Kumar –
Hepsiba –
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Hepsiba –
Waren –
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Waren –
Vanish –
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Vanish –