Edwards EST 3-CPU3


Central Processor Unit Module

Lead Time: 6-8 Business Days

  • Factory New
Brand: EST FireAlarm.com Part #: 015808 Categories: , , Manufacturer Part #: 3-CPU3 Tags: ,


The 3-CPU3 is the Central Processing Unit Module monitoring the status of all modules and providing the link for network communications. Although each local rail card contains their own microprocessor, the 3-CPU3 provides all inter-module communication and has the ability to download rail module operating parameters. Upon power up the 3-CPU3 automatically learns all local rail module attributes and locations. Site specific software is loaded into the 3-CPU3 which then downloads data to each local rail module. Firmware upgrades are also done from the 3-CPU3 eliminating the need to unplug chips on rail modules. Internal rail communications is accomplished in a broadcast protocol for fast response.

Mounting must be in the first two local rail spaces. Options for the 3-CPU3 include the addition of an LCD display and User Interface, RS-232 Communication Card, and RS-485 Series Network Communication Cards.

The 3-CPU3 is fully compatible with the 3-CPU and 3-CPU1 modules.


Weight 1.00 lbs








  • 16 bit processor
  • Up to 1,000 history events
  • RS-485 local rail communications
  • Multiplexed audio channels
  • Network communication RS-485
  • RS-232 communication card
  • Form ‘C’ contacts for: Alarm, Supervisory and Trouble
  • Low voltage memory write protection
  • Non-volatile memory


EST3 Central Processor Unit; 3-CPU3, 3-RS485A, 3-RS485B, 3-RS232
Edwards – Data Sheet


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