Thorn Automated 976217 DC Audio Signal Module

Description:

The Thorn Automated OXA-502SDA DC Audio Signal Module OXA-503SDA (P/N 976217) is used in addressable fire alarm control systems to supervise and drive DC notification appliance circuits and emergency voice evacuation audio circuits. Commonly installed in Autocall TFX-500 and TFX-800 fire alarm systems serving commercial buildings, hospitals, schools, industrial facilities, and institutional life safety installations requiring supervised notification and audio signaling. Fire alarm technicians and system integrators use this signal module for system expansion, preventive maintenance, replacement of failed signal driver modules, and restoration of supervised DC and audio notification circuits. 

Applications:

The Thorn Automated OXA-502SDA module provides supervised DC and audio signal outputs for notification appliances and emergency voice evacuation equipment while communicating with compatible Autocall fire alarm control panels. It is widely used to control horns, strobes, speakers, audio risers, and other notification devices in commercial and industrial fire detection systems where continuous circuit supervision and reliable emergency signaling are required. 

Technical Specifications:

• Brand: Thorn Automated Systems / Autocall
• Model: OXA-502SDA / OXA-503SDA
• Part Number: 976217
• Additional Number: 19700402
• Product Type: DC Audio Signal Driver Module
• Function: Supervised DC and Audio Signal Driver
• System Type: Addressable Fire Alarm System
• Compatible Systems: Autocall TFX-500 and TFX-800 Fire Alarm Control Panels
• Application: Emergency Voice Evacuation and Notification Appliance Control
• Mounting: OXM-501SDA Motherboard Assembly
• End-of-Line Resistor: 27 kΩ, 1 W (P/N 976250)
• Audio Riser End-of-Line Resistor: 5.1 kΩ, 2 W (P/N 4281-050)
• OXA-503SDA DC Return Supervision Relay: P/N 19240410
• Communication: Addressable Loop Interface
• Installation: Plug-In Module
• Designed for Continuous Life Safety Operation
• OEM Fire Alarm System Component

Common Replacements:

• Thorn Automated Systems OXA-501SDA 976186
• Thorn Grinnell OXA-504SDA 976216
• Thorn Automated Systems OXA-500SDA 976091