Industrial MP-500 Main Processor Board Circuit Board

Description:

The Thorn Grinnell MP-500 Main Processor Board Circuit Board is used in addressable fire alarm control systems to provide central processing, system supervision, and communication for all fire alarm detection, notification, and control functions. Commonly installed in Thorn Grinnell Autocall TFX-500, TFX-500M, TFX-800, and TFX-800M fire alarm control panels protecting commercial buildings, hospitals, schools, industrial facilities, and institutional life safety systems. Fire alarm technicians and system integrators use this main processor board for controller repairs, preventive maintenance, system upgrades, and replacement of failed processor modules. 

Applications:

The Thorn Grinnell MP-500 Main Processor Board Circuit Board functions as the primary signal processing unit within compatible TFX fire alarm control panels, receiving alarm, supervisory, and trouble signals from addressable devices while controlling notification appliances, relay outputs, communication interfaces, and remote annunciators. It is widely used in commercial and industrial fire detection systems where continuous system monitoring, event processing, and life safety control are required. 

Technical Specifications:

• Brand: Thorn Grinnell / Autocall
• Model: MP-500 Main Processor Board
• PCB Number: 940500
• Product Type: Main Processor Circuit Board
• Order Part Number (TFX-500): 976037
• Order Part Number (TFX-800): 976099
• Function: Central Fire Alarm Signal Processing and System Control
• Compatible Systems: Autocall TFX-500, TFX-500M, TFX-800, TFX-800M
• Input Voltage: 24 VDC
• Output Voltages: +5 VDC, +12 VDC, +26 VDC
• Communication Interfaces: Local Bus, Remote Bus (RS-485), Remote Network Interface
• EEPROM: Site-Programmable Configuration EEPROM
• Relay Outputs: Alarm and Fault Relay Contacts
• Mounting Position: Main Processor Board Position (B1/BP1)
• Application: Addressable Fire Alarm Control Panel
• OEM Fire Alarm System Component
• Designed for Continuous Life Safety Operation

Common Replacements:

• Thorn MP-500 Main Processor Board 976037
• Thorn MP-500 Main Processor Board 976099
• Thorn 940500 MP Main Processor Board