HIMA F-Series SIL 3 Spares F3335 F3236 F3349 Modules In Stock

The modules listed on this page belong to HIMA's classic HIQuad (H41q/H51q) safety system platforms, widely used for emergency shutdown and interlocks in oil, gas, and chemical processing. Since these legacy systems have been running in the field for decades, we supply a reliable stock of critical F-Series hardware to handle aging parts and routine maintenance without requiring a costly full-system upgrade. While our featured inventory highlights high-demand units like the F3335 digital output, F3236 digital input, and F3349 relay module, our full selection covers the entire supporting rack architecture. This includes the F8650/F8650X/F8627X/F8652X central processors and communication cards, F3221 and F3330 discrete I/O, F6217 and F6221 analog modules, and F7126/F7133 power supplies to keep your safety loops running safely.

Note:

• Hardware Revisions: Check jumper settings and firmware versions when replacing legacy modules (such as non-X versions) to ensure seamless compatibility.
• System Integrity: These modules strictly comply with IEC 61508 SIL 3 standards for ESD applications; ensure proper coding key alignment during installation.
• Fused Monitoring: Regularly inspect front-panel LED indicators on power distribution modules like the F7133 for immediate circuit fault or blown fuse detection.

• Core System Architecture: Based on the classic 2oo4D / QMR (Quadruple Modular Redundant) architecture designed for fail-safe Emergency Shutdown (ESD) systems and critical interlocks in high-risk process industries.
• Processor Redundancy: Modules utilize dual internal microprocessors operating in parallel with intelligent self-diagnostics to ensure high availability and safety.
• Functional Safety Compliance: Fully compliant with IEC 61508 and certified up to SIL 3 by TÜV.
• Hazardous Area Approvals: Certain modules (e.g., F3335) carry ATEX explosion-proof (intrinsically safe Ex(i)) certifications for direct field deployment.

F3236 (Digital Input)

• Sourcing & Stocking: High-density 16-channel card frequently required for system expansions or replacing aging multi-channel modules. Sourcing original factory-sealed stock prevents the need for costly field rewiring.
• Core Role & Compatibility: Handles safe field signal acquisition (emergency stops, limit switches) with SIL 3 isolation within legacy HIQuad Eurocard racks.
• Key Variance vs. Output: Passive signal receiver; experiences virtually zero physical wear compared to output cards, making reliable, long-term shelf stock perfectly viable for passive maintenance.
• Electrical Specs & Diagnostics: 16 channels at 6 mA (draws 120 mA @ 5VDC / 200 mA @ 24VDC); features continuous self-tests and crosstalk detection via walking-zero.

F3335 (Digital Output)

• Sourcing & Stocking: Critical 4-channel actuator drive card. Because it switches higher currents (up to 500 mA) in harsh field environments, it faces higher operational wear. Securing genuine, un-repaired spares is vital to avoid unexpected ESD loop downtime.
• Core Role & Compatibility: Executes physical safety actions (tripping ESD solenoid valves) following the fail-safe de-energize-to-trip principle in existing subracks.
• Key Variance vs. Input: Active load-switching device; subject to thermal stress and inductive kickback from field actuators, directly impacting component lifespan.
• Electrical Specs & Diagnostics: 4 channels driving up to 500 mA (12 W) (draws 110 mA @ 5VDC + 24VDC supply); features integrated wire-break detection and drops to zero upon supply interruption.

 

System General Specifications (Applies to all F-Series CPUs and communication modules)

• Backplane Logic Supply: 5 VDC and 24 VDC
• Operating Ambient Temperature: 0 °C to +60 °C (32 °F to 140 °F)
• Functional Safety Certification: Strictly compliant with IEC 61508 SIL 3 standards, TÜV certified
• Hardware Fault-Tolerance Mechanism: Supports parallel dual-microprocessors and QMR (Quadruple Modular Redundant) fail-safe sub-system architecture
• Core Operational Function: Ensures high availability and communication security for ESD (Emergency Shutdown) system logic execution

The following reference table is compiled based on official HIMA hardware technical manuals, providing a detailed breakdown of the core processing and communication modules, including model characteristics, network protocols, and backplane current load figures.

Product Image	Model	Module Family	Operating Voltage	Protocols & Interfaces	Backplane Current Consumption (5 VDC / 24 VDC)	Action
	F8650	Central Processor Unit	24 VDC	Internal Bus Communication	1700 mA / 150 mA	Inquire Now!
	F8650X	Enhanced Central Processor	24 VDC	Internal Bus with Extended Diagnostics	1700 mA / 150 mA	Inquire Now!
	F8627X	Ethernet Communication Module	24 VDC	Modbus TCP slave, HIPRO-S. (Used for external communication interfacing with central control rooms)	1200 mA / 50 mA	Inquire Now!
	F8652X	Enhanced Safety Processor	24 VDC	Redundant System High-Speed Sync Interface	2200 mA / 120 mA	Inquire Now!

Procurement & Field Implementation Notes:
The F8650X and F8652X are engineered for high-risk industrial redundant and fault-tolerant environments, featuring built-in high-density fail-safe self-diagnostics. The F8627X communication module serves as the core data exchange hub and must be paired with the corresponding system license and compatible safety firmware version. When performing field spare parts replacement or system expansion, always verify the physical coding keys and jumper settings strictly to prevent mechanical damage and logic addressing errors.

HIMA F-Series I/O modules are core components of the classic HIQuad (H41q / H51q) safety control system, designed for critical Emergency Shutdown (ESD) and process interlock applications. This family provides robust, SIL 3 certified signal acquisition and actuator driving capabilities to maintain operations under harsh industrial conditions.It is part of the older central control system platforms, which mainly include the H41q and H51q systems.
The following reference table is excerpted from official HIMA hardware documentation, providing a detailed breakdown of the digital and relay I/O modules listed in the overview section, covering channel counts, operating voltages, safety integrity levels, and signal characteristics:

Product Image	Model	Module Type	Channels	Operating Voltage	SIL Level	Signal Type & Special Features	Action
	F3236	Digital Input	16	24 VDC	SIL 3	Contact inputs, walking-zero testing. (Highly popular; frequently paired with the F3335)	Inquire Now!
	F3221	Digital Input	16	24 VDC	Non-Safety	Standard passive mechanical contact/sensor signal acquisition, supplied with cable connectors.	Inquire Now!
	F3330	Digital Output	8	24 VDC	SIL 3	Resistive/inductive load, 0.5 A, read-back. (Commonly used to drive high-power relays)	Inquire Now!
	F3335	Digital Output	4	24 VDC	SIL 3	Intrinsically safe Ex-i, high-power output. (Frequently paired with the F3236)	Inquire Now!
	F3349	Digital Output	8	24 or 48 VDC	SIL 3	Compatible with 24 VDC/48 VDC power supplies, 0.5 A drive per channel, with full line and wire-break diagnostics.	Inquire Now!

Please note that module F3221 is a Non-Safety rated unit within the table; ensure it is never mistakenly utilized in high-risk SIL 3 interlocking safety loops.

These analog modules are integral to the classic HIQuad (H41q / H51q) safety systems, designed to process continuous process variables such as 0...20 mA or 4...20 mA signals. They are widely deployed in critical industrial processes requiring precise monitoring of level, temperature, or pressure to execute reliable SIL 3 interlock functions.
The following reference table is compiled based on official HIMA hardware technical manuals, providing a concise breakdown of the analog modules:

Technical Advisory & Field Implementation Notes:
Please note that module F6221 is a Non-Safety rated unit; ensure it is never mistakenly utilized in high-risk SIL 3 interlocking safety loops. For critical control loops requiring fault tolerance, verify physical coding keys on the subrack and ensure exact loop impedance matching prior to module insertion.

Reliable power supply and distribution are critical to maintaining the fault-tolerant operation of the classic HIQuad (H41q / H51q) safety systems. These modules provide secure system logic power and perform voltage monitoring, ensuring continuous operation of the safety controller and preventing nuisance trips caused by primary power fluctuations.
The following reference table is compiled based on official HIMA hardware technical manuals, providing a concise breakdown of the power supply modules explicitly listed in your overview section:

Product Image	Model	Module Type	Channels	Operating Voltage	SIL Level	Signal Type & Special Features	Action
	F7126	Power Supply Module	N/A (System Supply)	24 VDC input / 5 VDC output (20 A)	SIL 3	24V-5V (20A) supply, redundant capable, voltage monitor.	Inquire Now!
	F7133	Power Distribution Module	N/A (Distribution)	24 VDC	SIL 3	24V distribution, reverse polarity protection, diagnostics.	Inquire Now!

Technical Advisory & Field Implementation Notes:Ensure that redundant power supplies are wired correctly to maintain the high-availability architecture of the safety subrack. Verify subrack coding keys prior to module insertion to avoid backplane voltage misalignments.

The HIMA safety control system has undergone continuous iteration and smooth upgrades, evolving from discrete components to quadruple modular redundancy (QMR), and then to being compatible with classic I/O and supporting modern unified engineering software platforms.

Key Explanation of Generation Evolution: The F-series cards widely used in the field (such as the F3236, F3335, F6217, and F7126 cards you mentioned earlier) belong to the HIQuad (H41q/H51q) system platform. In 2018, HIMA launched the fourth-generation central control unit (HIQuad X), achieving full backward compatibility with the mature I/O modules of the older F-series, thereby protecting users' early assets and facilitating smooth upgrades.

Backplane Current Calculation

Each module draws current from the HIQuad (H41q / F-Series) backplane. When determining the capacity of the system rack power modules (such as the F7126), add the 5VDC system logic current and 24VDC distribution current of all installed modules on the subrack separately to ensure that the main power module is not overloaded.
Typical Configuration Example (Refer to the HIMA Hardware System Manual):

• F8650 (Central Processing Unit): 2000 mA @ 5V, 150 mA @ 24V
• F3236 (16-channel digital input): 120 mA @ 5V, 200 mA @ 24V
• F3330 (8-channel digital output): 180 mA @ 5V, 110 mA @ 24V (For driving high-power relays, additional field circuit power distribution calculations are required)
• F6217 (8-channel analog input): 150 mA @ 5V, 80 mA @ 24V

The total logic current of the 5VDC system needs to be calculated by adding the corresponding cards on the subrack. Using a single F7126 (5VDC output capability up to 20A redundancy / 10A standalone) for power supply configuration is more than sufficient.

The following is a reference table showing the backplane current consumption of the above typical high-frequency modules:

(Note: As the main power module, F7126 does not consume 5V/24V logic current from the backplane itself, but converts the 24VDC input into 5VDC to supply the entire backplane system.)

Back-up Battery

The central processing module of the HIMA HIQuad (F-Series) system (such as F8650, F8650X, etc.) is equipped with a backup lithium battery (such as CR 2477N model) to maintain the system real-time clock (RTC) and diagnostic fault records in the event of a complete rack power failure.

• Typical lifespan: Approximately 2-4 years.
• Status monitoring: Observe the "SYS" or "ERR / BAT" fault indicator light on the front panel of the CPU module.
• Replacement guidelines: Ensure the rack is powered on (operating) when replacing the battery; the internal capacitors on the motherboard can maintain charge for approximately 30 minutes, allowing for safe battery removal and installation to avoid data loss. Never blindly remove the CPU card when the power is off and without capacitor support.

Firmware and software compatibility

HIMA F-series controllers have strict specifications regarding the compatibility of engineering configuration software and underlying firmware versions, and cannot be used interchangeably across platforms.

• The third-generation HIQuad (H41q / F-Series) requires ELOP II or ELOP II-NT software for logic configuration, with minimum firmware requirements typically V6-V7 or higher.
• The fourth-generation HIQuad X (F 8650X, etc.) upgrades support SILworX unified engineering configuration software and complies with the IEC 62443 network security standard.

Note: Security controller firmware cannot be directly downgraded. Before ordering spare parts or replacing new hardware, the actual hardware version and firmware version number currently running in the field must be read and verified using engineering software.

Functional Safety Core Design

◉ Hardware Architecture and Certification Levels

1. SIL3 and PLe Certification: F-Series platforms (such as F35, F60, and F8627X) comply with IEC61508 and IEC61511 standards. Single and redundant configurations meet Safety Integrity Level 3 (SIL3) and Performance Level e (PLe) criteria.
2. 1oo2 Microprocessor Architecture: The F-Series central processing unit (F-CPU) utilizes an internal 1oo2 (One out of Two) dual-microprocessor architecture. Two independent processors execute identical user programs, performing continuous cross-data alignment and arithmetic-logic validation. Detection of hardware discrepancy triggers an immediate safe state.

◉ Diagnostics and Safety Integrity

1. Online Self-Diagnostics: CPU and safety I/O modules (such as F3236 and F3330) feature a Diagnostic Coverage (DC) exceeding 99%. Continuous online tests monitor internal buses, memory (RAM/ROM), clock sources, power supplies, and I/O channels.
2. Line Monitoring: Integrated open-circuit and short-circuit monitoring for field-side components ensures loop integrity under SIL3 requirements.
3. De-Energize to Trip Principle: The platform operates on a fail-safe architecture. Upon detection of unrecoverable internal faults or external channel failures, outputs de-energize to bring the process to a safe shutdown state.

High Availability Redundancy Deployment

Fault-Tolerant Architecture and XMR Technology

• XMR (Flexible Modular Redundancy): HIMA F-Series implements XMR technology to combine functional safety with high availability. Redundant hardware topologies (such as dual 1oo2 or 2oo3) prevent production downtime from single-point failures while maintaining the SIL3 rating.
• Hot Standby and Bumpless Transfer: Redundant F-CPUs synchronize data via high-bandwidth redundancy links. Upon a primary control unit hardware failure, the backup unit assumes control without causing disturbances to field actuators or control processes.

I/O and Communication Redundancy

• I/O Module Redundancy: Input and output modules support dual or multiple redundant configurations. If an F-Series input channel fails, the redundant channel maintains data acquisition. Output wiring and internal logic ensure safe control delivery during individual channel short-circuits or fuse failures.
• SafeEthernet Communication Redundancy: F-Series uses the SafeEthernet protocol for safety-critical networking over redundant topologies with dual independent switches and network interfaces. If one communication path fails, data routes through the backup path within SIL3 timing and response constraints.

Engineering Deployment and Maintenance

--Online Change: Safety logic modifications can be downloaded via the SILworX engineering tool during active plant operation without interrupting the production process.
--Hot Swap: F-Series modules support live hot-swapping. Defective I/O or redundant CPU modules can be replaced under power while maintaining continuous SIL3 operation. Inserted modules automatically synchronize configuration and runtime data from the active controller.

HIMA F-Series safety controllers serve as the primary safety processing nodes across various industrial topologies. The dedicated safety control engine enables the simultaneous execution of emergency shutdown, burner management, turbomachinery protection, and fire and gas monitoring programs within a single chassis or distributed network:

 

Factory Automation (Isolated and Distributed Safety Control)

In centralized or distributed industrial deployments, F-Series controllers coordinate local and remote safety I/O through safety communication protocols. This architecture focuses on deterministic safety logic execution and integrates seamlessly with upper-level control and supervisory layers to deliver real-time safety protection and status visualization for production units.

• Core Components: F8650/F8650X/F8652X central processing units (Safety CPUs), F3221 (16-channel digital input module), F3236 (16-channel digital input module with SIL3 isolation).
• Key Advantages: Minimizes safety response times for high-volume manufacturing and critical equipment while reducing field safety cabling expenditure.

Process Control (High Availability and Process Instrumentation Integration)

For process industries such as chemical, pharmaceutical, or refining, the F-Series architecture leverages Flexible Modular Redundancy (XMR) technology. It manages complex safety interlocking logic, analog safety signal conditioning, and dual or 2oo3 redundant controller configurations to prevent unintended process shutdowns.

• Core Components: F8650X/F8652X processors (paired in redundant hot-standby configuration), F6217 (8-channel analog input module), F6221 (8-channel intrinsically safe Ex i analog input module), F3330/F3335/F3349 (4/8-channel safety digital output modules).
• Key Advantages: High-availability logic and bumpless transfer technology ensure zero system downtime during critical process phases in the event of a single-point hardware failure.

 

System Integration (Multi-Protocol and Third-Party DCS Interface)

The F-Series platform performs high-efficiency system integration through standard industrial networks and dedicated safety networks, achieving interconnection with mainstream DCS/HMI systems and various HIMA platforms. It supports high-precision data synchronization and open communication over standard physical media, directly integrating safety diagnostic data into the overall plant information engine.

• Core Components: F8627X communication interface module (supporting SafeEthernet, Modbus TCP, and OPC), F7126 (power supply monitoring and distribution module), F7133 (4-channel safety power distribution module with fuse monitoring).
• Key Advantages: Seamless cross-platform interconnection that enables plant-wide asset management and open data exchange without compromising safety response speeds or SIL3 safety integrity.

Core Module Replacement & Upgrade Matrix

This table lists the officially designated direct upgrade/replacement models for classic F-series hardware without changing the original system rack architecture:

System-Level Migration Matrix

• Path A: Backward-Compatible Migration to HIQuadX System

Applicable for in-situ upgrades of small-to-medium systems. Retains original F-Series safety I/O modules (e.g., F3236, F3330) and upgrades only the master control layer to the HIQuadX architecture (using the F-CPU01 CPU and F-COM01 communication module). Software is converted to the SILworX platform without changing field wiring.

• Path B: Full Migration to Next-Gen HIMax or HIMatrix Systems

Applicable for large-scale plant-wide ESD/BMS system reconstructions or small-to-medium distributed networking.

Large Systems: Complete replacement with the HIMax platform, utilizing dedicated Migration Adapters to interface directly with existing F-Series field cables.

Small-to-Medium Systems: Complete replacement with the HIMatrix platform (e.g., F35, F60 all-in-one controllers).

Migration Decision Basis

• Online Hot-Swapping:Upgraded models with the "X" suffix (e.g., F8650X) support live hot-swapping under redundant mode, enabling single-module replacement without system downtime.
• Logic Inheritance:Safety logic from legacy systems can be imported directly into SILworX via official HIMA conversion tools, minimizing re-validation engineering hours.

Hardware LED Diagnostics & Field Troubleshooting

This table defines the precise hardware LED combinations and the exact physical actions required on-site:

Step-by-Step Troubleshooting Sequences

In practice, the following steps must be strictly followed to prevent unplanned shutdowns (false tripping):

Safety Restrictions for Field Application

• Watchdog Timing Limits:During F-Series module hot-swapping, internal data recovery and channel alignment are strictly bound by the Safety Time / Watchdog constraints. While removing the damaged module and inserting the new spare, touching or disturbing the active redundant counterpart hardware is strictly prohibited.
• Forcing Prohibition:During field troubleshooting, input signals tied to safety interlocks (SIS) are typically strictly prohibited from being forced within the software. Forcing without a proper safety assessment in the engineering software is prohibited, as it invalidates the Safety Integrity Level (SIL3) of the system.

We stock the following HIMA F-Series SIL 3 module models (new, factory sealed):

• F8650, F8650X, F8652X
• F8627X
• F3221, F3236
• F3330, F3335, F3349
• F6217, F6221
• F7126, F7133

All units include:

• Original HIMA packaging
• Clear product status report (date code, firmware version if available)
• 1-year warranty

Lead time: Same-day processing for in-stock items. Shipping via DHL, UPS, or FedEx.

Contact now

Need help verifying firmware compatibility or safety certification requirements?

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