1. General Specifications

Product Series: HIQuad X (H41X / H51X)
Safety Level:

SIL 3 (IEC 61508)

PL e (EN ISO 13849)

Functional Positioning:

I/O bus management

Process data exchange

Watchdog signal output

Redundancy:

Supports 1:1 redundant configuration

Power Supply:

24 VDC (SELV / PELV compliant)

Applicable Racks:

H41X (Basic / Extended Rack)

H51X (Basic / Extended Rack)

2. Core Functions
I/O Bus Management

Manages communication between base rack and expansion racks

Controls system bus A/B operation

Enables reliable process data transmission between I/O modules and processor

Data Exchange

Bidirectional communication with F-CPU01 processor module

Forwards I/O process values and control commands

Ensures deterministic data handling within the safety system

Watchdog Signal Output

Provides secure watchdog signals via system bus A/B

Supervises output module integrity

Ensures fail-safe response in case of communication interruption

Redundant Synchronization

Supports seamless synchronization in 1:1 redundant architecture

Automatic switchover between primary and backup modules

Maintains uninterrupted system operation

3. System Architecture & Applications
System Architecture

The module operates as part of the HIQuad X safety system, together with:

F-CPU01 – Safety Processor Module

F-COM01 – Communication Module

F-PWR01 – Power Supply Module

F-DI / F-DO / F-AI / F-AO – Safety I/O Modules

Together, these components form a modular, scalable SIL 3 certified safety control platform.

Typical Applications

Petrochemical ESD and Fire & Gas (F&G) systems

Boiler and turbine safety protection in power plants

Safety interlocking of high-risk equipment in metallurgy and mining

Offshore platform and FPSO safety control systems