SIS / ESD process safety

Independent safety protection for high-risk process units.

EHOUSE packages SIS cabinets, safety I/O, ESD valve interfaces, cause-and-effect logic, HMI diagnostics and FAT/SAT evidence into a dedicated safety layer for chemical, energy, aerosol, LNG/LVG, utilities and process skids.

Discuss SIS scope Download PDF brochure
3D SIS process safety scene with tanks, instruments, safety cabinet and ESD valves

Safety function model

Detect, decide and drive the process to a safe state.

A modern SIS detects hazardous conditions, executes verified safety logic and isolates equipment through ESD valves, pump trips, alarms and safe-state actions. The safety layer remains independent from normal process control while sharing operating visibility where appropriate.

SIS process safety architecture with safety trip path and BPCS monitoring path Certified SIS

Scope of supply

Safety logic, final elements and lifecycle records in one package.

  • SIS logic solver, safety I/O, ESD valve interfaces and hardwired shutdown signals.
  • Cause-and-effect matrix, SIF logic, bypass management, alarm indication and HMI diagnostics.
  • FAT/SAT, proof-test planning, change control and lifecycle evidence for audit-ready handover.
Safety loop closeup with sensors, SIS cabinet, ESD valve and HMI
Safety loop architecture: sensors, safety I/O, logic solver, ESD valves, pump trip and HMI diagnostics.
Four-step SIS sequence from detection to safe state SIS Logic Solver
Four-step sequence: detect abnormal condition, decide through SIS logic, trip final elements and verify safe state.
01

Independent protection layer

Dedicated safety trip paths reduce common-cause risk and keep critical SIF execution distinct from normal BPCS control.

02

High availability

Redundancy, diagnostics and clear operating evidence help protect uptime while maintaining safety integrity for critical process assets.

03

Compliance evidence

Documentation supports IEC 61511 / IEC 61508 style lifecycle activities including SIL targets, LOPA, verification and proof-test planning.

Typical applications

Designed for hazardous process and utility packages.

SIS / ESD systems are suitable for tank farms, chemical skids, aerosol and gas units, LNG/LVG handling, boiler and burner management interfaces, compressor packages, pump protection and other process units where a defined safe state is required.

High-high level High pressure High temperature Rupture / vent ESD valve close Pump trip Alarm & diagnostics Safe-state verification