Thorn Automated Systems OXA-503SDA Audio Signal Driver Module

Description:

The Thorn Automated Systems OXA-503SDA Audio Signal Driver Module OXA-502SDA 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 driver module for system expansion, preventive maintenance, replacement of failed signal driver modules, and restoration of supervised audio and notification circuits. 

Applications:

The Thorn Automated Systems OXA-503SDA Audio Signal Driver Module OXA-502SDA provides supervised outputs for emergency voice evacuation systems and DC notification appliance circuits while communicating with compatible Autocall addressable fire alarm control panels. It is widely used to operate horns, strobes, speakers, audio risers, and other notification devices in commercial, healthcare, educational, and industrial fire detection systems where continuous circuit supervision and reliable emergency signaling are required. 

Technical Specifications:

• Brand: Thorn Automated Systems / Autocall
• Models: OXA-503SDA, OXA-502SDA
• Part Number (OXA-502SDA): 976217
• Part Number (OXA-503SDA): 976218
• Product Type: 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
• Installation: Plug-In Module on OXM-501SDA Motherboard
• Communication: Addressable SLC Loop
• Notification Circuit Type: DC and Audio Signal Outputs
• 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
• Application: Emergency Voice Evacuation and Notification Appliance Control
• Designed for Continuous Life Safety Operation
• OEM Fire Alarm System Component

Common Replacements:

• Thorn Automated Systems OXA-501SDA 976186
• Thorn Automated Systems OXA-504SDA 976216
• Thorn Automated Systems 505SDA