EST

Edwards EST refers to the Edwards Systems Technology family of intelligent fire alarm control panels, now under Edwards Fire Safety (UTC/Carrier).
Key models include iO Series (iO64/iO1000 for small-mid buildings), EST3/EST3X (modular networks up to 64 nodes), and EST4 (latest with enhanced cybersecurity and mass notification).
Main Models
Model
Points
Key Features
iO64
64
1 SLC loop, 2 NACs, Signature protocol, auto-programming ​
iO1000
250-1000
1-4 SLC loops, 4 NACs, expandable with SDC cards 
EST3
Modular
Unified fire/security/MNS, up to 64 nodes ​
EST4
Networked
Cyber-secure, mass notification, easy retrofit