Designed for hazard monitoring and control at industrial sites, HS81-HS Controller performs flame, smoke, and gas detection as well as extinguishing/agent release. Unit interfaces with plant safety and control systems through multiple protocols and includes hot swap capability for replacement and auto-configuration of CPUs and power supplies without critical system shutdown. HS81-HS controller carries SIL2 and SIL3 ratings in addition to meeting NFPA-72 and EN-54 requirements.