BOSCH PRS-NCO3 Network Controller

Product Parameters

• Model Number: PRS-NCO3
• Series: Praesideo Digital Public Address and Voice Alarm System
• Supply Voltage: 24 to 48 VDC
• Power Consumption: 5.8 W (DC)
• Ethernet Interface: 10/100Base-T (RJ45) for PC/Network connection
• Optical Interfaces: 2 x Praesideo network connectors
• Control Inputs: 8 x Configurable inputs (with supervision)
• Control Outputs: 5 x Configurable relay outputs
• Audio Storage: Internal flash memory for pre-recorded messages and tones

Product Description The Bosch PRS-NCO3 is the heart of the Praesideo digital public address and voice alarm system. It manages and routes all audio signals, provides system control, and monitors the status of all connected devices within the network. This network controller handles high-quality digital audio distribution and offers extensive logging capabilities for system events and faults. It features an integrated web server for configuration and diagnostics, and its internal message manager allows for the simultaneous playback of multiple digital messages. The unit is designed for high reliability, featuring a redundant network loop capability to ensure system integrity in the event of a cable break.

Application Areas This network controller is widely implemented in safety-critical environments such as international airports, railway stations, tunnels, and high-rise commercial buildings. It is specifically designed to manage complex evacuation protocols, background music distribution, and multi-zone paging in large-scale infrastructure projects requiring EN54-16 compliance.

Product Specifications

• Weight: 5.9 kg (13.0 lbs)
• Dimensions: 88 mm x 483 mm x 400 mm (19-inch rack, 2U)
• Country of Origin: Portugal / Germany
• Certification: EN 54-16 / ISO 7240-16 / UL 864

Operational Precautions

• Ensure the Praesideo optical network cables are handled with care; avoid sharp bends or excessive tension to prevent signal loss in the fiber optic ring.
• Use a stabilized 24V or 48V DC power supply; the controller is often backed up by a battery system to maintain operation during AC power failures.
• Ground the rack housing and the controller’s ground terminal to protect the system against lightning-induced surges and electromagnetic interference.
• Regularly backup the system configuration file and message database to an external PC via the web-based management interface.

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