Description

The HIMA F8651X is a certified safety-grade digital input(DI)module engineered by HIMA Paul Hildebrandt GmbH,a global leader in functional safety systems.Designed for integration into HIMA’s H51q and H41q programmable safety controllers,this 16-channel module reliably acquires binary signals from field devices—such as emergency pushbuttons,limit switches,and fire detectors—in applications demanding up to SIL 3(Safety Integrity Level 3)per IEC 61508/61511.With built-in line monitoring,redundant diagnostics,and fault-tolerant architecture,the HIMA F8651X ensures that critical safety logic responds accurately,even under fault conditions.

Application Scenarios

At a major LNG export terminal in Qatar,an aging turbine overspeed protection system was upgraded to a modern HIMA H51q platform featuring HIMA F8651X modules to capture trip signals from speed probes and manual shutdown buttons.The facility faced recurring nuisance trips due to undetected wiring faults in its legacy DI cards—a risk that could trigger costly production halts or,worse,fail to act during real emergencies.By deploying the HIMA F8651X,engineers gained continuous live-line monitoring:every channel now verifies wire integrity,detects short circuits,open circuits,and ground faults in real time.Within six months,false trips dropped by 95%,and during a simulated turbine runaway test,the system triggered a full shutdown in<100 ms—validating its life-saving reliability.This transformation highlights how the HIMA F8651X turns passive wiring into an intelligent,self-diagnosing safety layer.

Parameter

Main Parameters Value/Description

Product Model HIMA F8651X

Manufacturer HIMA Paul Hildebrandt GmbH(Germany)

Product Category Fail-Safe Digital Input(DI)Module

Safety Certification SIL 3 per IEC 61508,IEC 61511;FM,ATEX,IECEx(for hazardous areas)

Number of Channels 16 independent,galvanically isolated inputs

Input Voltage Range 20–30 VDC(nominal 24 VDC)

Diagnostic Coverage>99%(per IEC 61508),including open-circuit,short-circuit,cross-wire detection

Line Monitoring Yes–continuous live monitoring of field wiring integrity

Communication Interface Backplane connection to HIMA H51q/H41q controllers via redundant bus

Redundancy Support Full 1oo2 or 2oo3 voting compatible in HIMA safety architectures

Operating Temperature-25°C to+60°C

Installation Method DIN rail mount in HIMA-certified I/O chassis(e.g.,F86xx series carrier)

Technical Principles and Innovative Values

Innovation Point 1:Live Wire Diagnostics Without External Components–Unlike conventional DI modules that only read signal states,the HIMA F8651X injects diagnostic test currents during normal operation to verify wiring health—detecting degraded insulation,partial shorts,or loose terminals before they cause failures.

Innovation Point 2:True Channel Isolation with Fault Containment–Each of the 16 channels features independent galvanic isolation(≥500 V),ensuring a fault on one channel(e.g.,surge from lightning)cannot propagate to others—critical in high-risk zones like offshore platforms.

Innovation Point 3:Seamless Integration into HIMA’s Voting Architecture–The HIMA F8651X works natively within HIMA’s triple-modular redundant(TMR)or dual-channel systems,enabling automatic cross-comparison of input states across redundant modules to detect latent faults.

Innovation Point 4:Hot-Swap Ready for Zero-Downtime Maintenance–Certified for safe replacement during system operation,the HIMA F8651X allows technicians to swap modules without powering down the entire safety controller—minimizing production impact.

Application Cases and Industry Value

In a European nuclear power plant undergoing digital safety system modernization,the HIMA F8651X was selected to interface reactor coolant pump status signals into a new H51q-based reactor protection system(RPS).The legacy relay-based system lacked diagnostics and required monthly manual testing.With the HIMA F8651X,each pump feedback signal is continuously validated;any deviation triggers an immediate alarm logged in the plant’s maintenance database.During commissioning,the module detected a hidden ground fault in a 20-year-old cable run—preventing a potential spurious trip during operation.Regulators praised the solution for exceeding regulatory expectations on diagnostic coverage,accelerating licensing approval by three months.The plant now achieves>99.999%safety system availability,demonstrating how the HIMA F8651X elevates both safety and operational excellence.

Related Product Combination Solutions

HIMA H51q:High-performance safety controller platform designed to host HIMA F8651X modules

HIMA F8652X:Fail-safe digital output(DO)module,complementary for complete I/O safety loops

HIMA F8661X:Analog input safety module for temperature,pressure,or vibration in SIL 3 applications

HIMA F8600 Carrier Chassis:Modular I/O backplane supporting hot-swap and redundant power for HIMA F8651X

HIMA HIMax:Legacy but still supported safety system where HIMA F8651X may serve as a migration path component

HIMA SIS Engineering Tool(SET):Configuration software for logic design,diagnostics,and validation of HIMA F8651X-based systems

HIMA PESmart:Remote monitoring and asset health platform that ingests diagnostic data from HIMA F8651X

HIMA F8690X:Communication module enabling PROFIsafe or Modbus TCP integration with HIMA F8651X data

Installation,Maintenance,and Full-Cycle Support

Installing the HIMA F8651X requires placement into a certified HIMA I/O carrier(e.g.,F8600 series)within a properly grounded control cabinet.Wiring follows strict separation rules between safe and non-safe circuits,with shielded cables grounded at the controller end only.Upon power-up,the module performs a comprehensive self-test,and its LEDs indicate channel status(green=OK,red=fault).Commissioning is completed via HIMA’s SET software,where engineers assign tags,enable diagnostics,and integrate inputs into safety logic diagrams.

Maintenance of the HIMA F8651X is largely predictive:its continuous diagnostics feed into centralized dashboards,allowing teams to replace components before failure.In case of module replacement,hot-swap capability ensures the safety system remains active.As part of our full-cycle support,we supply only factory-original,unused HIMA F8651X units with valid calibration certificates and firmware traceability.Every module undergoes functional verification—including simulated open/short tests and redundancy handover—on authentic HIMA hardware.We also offer lifecycle services such as obsolescence planning,firmware updates,and migration path consulting for aging HIMA installations.