3-ZA40B | Edwards EST 40W Zoned Audio Amplifier with 25/70 VRMS Output and NAC Circuit

Edwards EST · Industrial Automation & Electrical

Description  The Edwards™ 3-ZA40B is a 40-watt zoned amplifier module for the EST3 fire alarm and voice evacuation system. It provides digital audio channel selection with built-in de-multiplexing circuitry and supports either 25 VRMS or 70 VRMS speaker circuits. Designed for reliable emergency communication, it also includes a 24 VDC NAC output for strobe synchronization.     Technical Specifications  Condition New/Never Used Surplus Brand Edwards / EST Category Flame Safety Products Part Number 3-ZA40B Subcategory Flame Safety Amplifier Type Zoned Amplifier Power Rating 40 W Output Voltage 25 VRMS or 70 VRMS (selectable) Input 8-channel multiplexed digitized audio Wiring Class A or Class B Frequency Response 400 Hz to 4 kHz ±3 dB Harmonic Distortion < 7% NAC Output 24 VDC, 3.5 A EOL Resistor 15 kΩ (internal) Wire Size 12–18 AWG (1.0–4.0 mm²) Space Requirement 1 LRM rail space Operating Temp 32–120 °F (0–49 °C) Relative Humidity 93% non-condensing Mounting Cabinet rail-mounted Weight 1.20 lbs     Information About 3-ZA40B The 3-ZA40B is part of the EST3 audio amplifier family, engineered to deliver high-quality voice and tone signals in life safety applications. It mounts in the EST3 cabinet, occupying one LRM rail space, and receives power and data through the system rail assembly. With software-controlled audio channel selection, the module can output live paging or stored messages from any of eight multiplexed channels. The amplifier supports Class A or B wiring, has selectable 25 VRMS or 70 VRMS outputs, and includes a dedicated 24 VDC NAC rated at 3.5 A for visual signaling devices such as strobes. Its rugged, digitally controlled design ensures compliance with fire alarm and emergency communication standards. Key Features: Digital Audio Distribution: 8-channel multiplexed input with built-in de-multiplexing. Flexible Output Voltage: Selectable 25 VRMS or 70 VRMS operation. 40-Watt Power Rating: Provides reliable output for medium-sized zones. Integrated NAC Output: 24 VDC, 3.5 A power-limited NAC included for strobes. Software Controlled: Audio channel selection managed through network programming. Compact Design: Occupies only one LRM rail space in the cabinet. Removable Terminals: Simplifies field wiring connections. Frequency Response: 400 Hz to 4 kHz with less than 7% harmonic distortion. Fault Tolerance: Supports Class A or Class B wiring configurations. Environmental Performance: Operates in temperatures from 0 °C to 49 °C with up to 93% RH. The 3-ZA40B delivers the reliability and clarity required for fire alarm voice evacuation and signaling applications.

Brand: Edwards EST · Category: Industrial Automation & Electrical

Key features

• Digital Audio Distribution: 8-channel multiplexed input with built-in de-multiplexing.
• Flexible Output Voltage: Selectable 25 VRMS or 70 VRMS operation.
• 40-Watt Power Rating: Provides reliable output for medium-sized zones.
• Integrated NAC Output: 24 VDC, 3.5 A power-limited NAC included for strobes.
• Software Controlled: Audio channel selection managed through network programming.
• Compact Design: Occupies only one LRM rail space in the cabinet.
• Removable Terminals: Simplifies field wiring connections.
• Frequency Response: 400 Hz to 4 kHz with less than 7% harmonic distortion.
• Fault Tolerance: Supports Class A or Class B wiring configurations.
• Environmental Performance: Operates in temperatures from 0 °C to 49 °C with up to 93% RH.

Specifications

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