Functions

Safety signal acquisition
Collects binary safety signals such as emergency stop pushbuttons, interlock switches, and limit switches, providing reliable inputs for SIS logic processing.

Fail-safe design
In the event of channel failure, outputs transition to a predefined safe state in accordance with IEC 61508 SIL 3 requirements, preventing dangerous failures.

Channel isolation
Each channel is electrically isolated to prevent single-point fault propagation, while effectively suppressing common-mode interference and ground loops.

Diagnostics and self-check
Supports built-in tests (BIT) and continuous online diagnostics, including detection of open/short circuits, overvoltage, undervoltage, and fault status reporting to the SIS.

Hot-swappable and redundant operation
Supports live insertion and removal, compatible with HIMA redundant architectures, enabling online maintenance without interrupting SIS operation.

Fast response
Input response time ≤ 1 ms, meeting the requirements of high-speed safety interlocking and emergency shutdown circuits.

HIMA F3236(Z7116) Security System Digital Input Module

Applications

SIS emergency shutdown systems (ESD) and fire & gas (F&G) monitoring in petrochemical plants and oil & gas platforms.

Power industry safety protection
Safety interlocking for thermal and nuclear power units, turbine overspeed protection, and boiler drum water level protection.

Industrial machinery safety
Safety door interlocks and emergency stop circuits in metallurgy, papermaking, and other heavy industries.