Description
The Edwards EST 3-ASU is an audio source unit designed for EST3 fire alarm and mass notification systems, supporting up to eight digital audio channels. It enables live paging, pre-recorded message playback, and seamless audio transmission over twisted pair or fiber optic connections for reliable communication.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Edwards EST |
| Category |
Fire Alarm Systems |
| Part Number |
3-ASU |
| Subcategory |
Audio Source Unit |
| System Compatibility |
EST3 fire alarm and mass notification systems |
| Audio Channels |
8 digital channels |
| Audio Transmission |
Twisted pair or fiber optic |
| Features |
Supports live paging and pre-recorded messages |
| Inputs |
Auxiliary audio input interface (paging/telephone) |
| Indicators |
VU display for paging output, Ready-to-Page LED |
| Digital Audio |
High-quality transmission with greater noise immunity |
| Standards |
UL 2572 (CCS, ACU, or LOC) |
| Optional Features |
LCD fire phone display, OSHPD seismic pre-approval |
| Application |
Fire alarm, MNEC, and emergency communications |
| Enclosure |
Fits EST3 cabinets with standard power supplies |
| Color |
Gray |
| Weight |
15 lbs |
Information About 3-ASU
The 3-ASU is an Edwards EST3 audio source unit engineered for integration into EST3 fire alarm and emergency communication systems. It provides eight digital audio channels for distributing paging and pre-recorded messages across networked panels with 3-ZA amplifiers. Audio data can be transmitted using twisted copper wiring or fiber optics, offering flexibility and enhanced noise immunity. Supporting Mass Notification/Emergency Communication (MNEC) applications, the 3-ASU complies with UL 2572 and can be equipped with optional features such as fire phone LCD display and OSHPD seismic pre-approval.
Key Features:
- Eight Digital Channels: Provides multiple audio sources for paging, tones, and pre-recorded messages.
- Flexible Transmission: Sends high-quality audio over twisted pair wiring or single fiber optic filament.
- Mass Notification Ready: UL 2572 listed for MNEC applications as CCS, ACU, or LOC.
- Live and Pre-Recorded Audio: Supports real-time paging alongside stored message playback.
- Auxiliary Audio Inputs: Interfaces with external paging systems, telephone networks, and campus-wide systems.
- User Indicators: Includes VU meter display and Ready-to-Page LED for clear operational feedback.
- Noise-Immune Transmission: Digital format reduces interference for clear, reliable communication.
- Scalable Design: Seamlessly integrates with EST3 panels and amplifiers for system-wide audio distribution.
- Optional Enhancements: Supports LCD fire phone call display and earthquake-hardened configurations.
- End-to-End Solution: Designed for life safety and emergency communication, including sleeping areas with low-frequency signaling.
The 3-ASU delivers the reliability and precision required for large-scale fire alarm and emergency communication systems in commercial, institutional, and high-occupancy environments.
