HIMA H51Q-HRS High-Security High-Redundancy Central Rack Kit

The HIMA H51Q-HRS is the **complete central rack assembly** of the highest safety level in the HIQuad H51q series, hardware model B5233-2. It has been discontinued by the original manufacturer and belongs to programmable electronic safety systems (PES). Featuring a 2oo4D quadruple redundant architecture with dual F8650X central units, it includes **dual-redundant CPU and dual-redundant I/O bus**, and holds TÜV SIL3 / AK6 safety certification, ensuring both safety and high availability through dual redundancy. The unit occupies a standard 5U 19-inch rack space, supports modular expansion, and can connect up to 16 external I/O sub-racks, accommodating a maximum of 256 I/O modules. It comes with redundant power supplies, bus terminators, fan monitoring, and battery management components. Programming is performed using ELOP-II NT software based on IEC 61131-3 standards, making it widely used in process safety interlocking applications.

Technical Specifications

Product Application

1. ESD Emergency Shutdown System for petrochemical, LNG and offshore platforms
2. F&G Fire & Gas detection and interlock protection system
3. Safety interlock control for gas turbines and turbomachinery
4. Power plant boiler FSSS and unit safety protection
5. SIS Safety Instrumented System for high‑risk process plants, applied for sites where unplanned shutdown is strictly prohibited

H51q Series Rack Models

1. H51q‑M: Single CPU, single I/O bus, standard availability, non‑safety certified
2. H51q‑MS: Single CPU (dual‑processor core), single I/O bus, TÜV SIL3 certified
3. H51q‑H: Redundant CPU, single I/O bus, high availability, non‑safety certified
4. H51q‑HS(B5233‑1): Redundant CPU, single I/O bus, TÜV SIL3 certified, high‑availability safety type
5. H51q‑HR: Redundant CPU, dual I/O bus, ultra‑high availability, non‑safety certified
6. H51q‑HRS(B5233‑2): Redundant CPU, dual I/O bus, TÜV SIL3 certified, highest safety & highest availability (subject model)