Bosch PRS-NCO3 Praesideo

PRS-NCO3 Praesideo Network Controller

The Network Control Unit (NCU) is the core of the Praesideo system, managing up to 28 simultaneous audio channels, delivering power, fault reporting, and overall system control. Designed for versatility, the NCU supports various audio inputs, including call station announcements, background music, and local audio. Configuring the unit is simple and efficient using a PC, though it operates independently once set up. It can display real-time system status via its included software and is adaptable for tabletop or 19″ rack mounting.

Praesideo PRS-NCO3

Requires Praesideo software version 4.0 or higher. 4 inputs (2 mic/line selectable, 2 fixed line inputs). Mic/line inputs support conditional programming for control actions and priority settings. Line inputs include 20 kHz pilot tone detection for cable monitoring. 4 line outputs with optional 20 kHz monitoring signal. Outputs can connect to visual and audible fault indicators. 3 programmable outputs for faults or calls. 2 dedicated for external fault or emergency indicators.

24 Vdc output for external devices such as fault or emergency lights. The unit is fully configurable via supplied software for efficient setup. Post-configuration, the system operates independently of the PC. With a 2 x 16-character LCD display and rotary control knob for menu navigation and status monitoring. Supports up to 60 nodes, including amplifiers, audio expanders, and call stations.

Built-in flash memory for up to 4 simultaneous message broadcasts. Preloaded with tones for alarms, announcements, and tests. Audio messages (WAV format) can be uploaded via Ethernet. Includes parametric equalization, gain adjustment, and limiter. Headset jack for real-time audio monitoring. Built-in clock for automated event scheduling, such as announcements and background music adjustments.

Supports loop or branched network configurations for reliability. Can handle 256 priorities across hundreds of zones. Comprehensive system monitoring, including microphones, cables, and loudspeakers. Stores up to 200 fault messages for diagnostics. Operates on mains power or 48 Vdc battery backup with automatic switchover. Monitors both power sources for reliability.

Front Panel

• 2 x 16-character LCD display
• Rotary/push-button interface
• Headphone output

Back Panel

• Mains switch and voltage selector
• Mains and battery backup inputs
• 8 control inputs
• 4 audio outputs and 4 audio inputs (2 mic/line, 2 line)
• 5 control outputs (3 programmable, 2 fault-specific)
• Ethernet and RS232 connections