HIMA F-Series Modules F6705 2-Fold Analog Output Module

Technical Dossier

Product Details And Specifications

HIMA F-Series Technical Notes

The HIMA F-Series represents one of the most widely deployed safety-rated I/O and controller module families in global heavy industry. Installed across petrochemical complexes, nuclear power stations, offshore platforms, and refinery process units, F-Series modules operate under IEC 61508 SIL 2/3 certification requirements. Their modular backplane architecture allows integration into HIMatrix and HIQuad safety controllers, making them a backbone component in emergency shutdown (ESD), fire and gas (F&G), and burner management systems (BMS) worldwide. The F6705, a 2-fold analog output module, is representative of the F-Series I/O layer: deterministic, fault-tolerant, and designed for continuous operation in classified hazardous environments.

The Evolution of F-Series Architecture

HIMA's F-Series architecture was introduced as part of the HIMatrix platform, designed to replace earlier relay-based and first-generation programmable safety systems. Early F-Series modules used parallel backplane communication with fixed-slot addressing. As the platform matured, HIMA introduced high-speed serial backplane buses, enabling faster diagnostic cycle times and tighter integration with the ELOP II Factory engineering environment.

The F6xxx sub-family (analog I/O) evolved from single-channel designs to multi-fold configurations (2-fold, 4-fold) to support redundant sensor loops without external multiplexing hardware. Compatibility between F-Series generations is managed through firmware versioning in the HIMatrix controller CPU; older analog modules such as the F6701 and F6703 remain electrically compatible with current HIMatrix X backplanes but require legacy ELOP II project files. Modules entering end-of-life status (e.g., F3330, F3236) are no longer manufactured but remain supported through third-party MRO channels for installed base maintenance.

F-Series Full Catalog & Functionalities (SKU List)

Analog Output Modules

• F6705: 2-fold analog output module, 4–20 mA, SIL 2, HIMatrix backplane compatible
• F6703: 2-fold analog output module, earlier revision, 0–20 mA range support
• F6721: 4-fold analog output module, 4–20 mA, extended channel density
• F6723: 4-fold analog output, HART-capable, for smart valve positioner loops

Analog Input Modules

• F6701: 4-fold analog input module, 4–20 mA, SIL 2 rated
• F6711: 8-fold analog input module, high-density sensor acquisition
• F6713: 8-fold analog input, HART pass-through, for field device diagnostics
• F6715: 4-fold RTD/thermocouple input module, temperature measurement

Digital Output Modules

• F3330: 16-fold digital output module, 24 VDC, solenoid valve drive
• F3332: 8-fold digital output, high-current 2A per channel, relay-equivalent loads
• F3334: 16-fold digital output, SIL 3 capable, dual-channel switching

Digital Input Modules

• F3236: 16-fold digital input module, 24 VDC, field switch monitoring
• F3238: 32-fold digital input, high-density, for large ESD matrix applications
• F3240: 16-fold digital input, SIL 3, with short-circuit detection per channel

CPU / Controller Modules

• F8650E: HIMatrix F35 CPU module, dual-processor safety controller, Ethernet SafeEthernet
• F8651E: HIMatrix F60 CPU module, high-availability configuration, redundant power input

Communication & Power Modules

• F8621A: SafeEthernet communication module, IEC 61784-3 compliant
• F7130: 24 VDC power supply module, redundant feed input, backplane bus power

Sourcing Hard-to-Find & Obsolete F-Series Parts

A significant portion of the global F-Series installed base consists of modules that HIMA has discontinued or placed on RFQ availability review. Models such as the F3236, F3330, F6701, and F6703 are no longer in active production. For plant operators running long-lifecycle safety systems — common in nuclear, refining, and offshore sectors where system replacement cycles span 15–25 years — sourcing these modules through OEM channels is no longer viable.

Quality Control for the F-Series Range

F-Series modules use a proprietary backplane bus protocol with active diagnostic handshaking between the CPU and each I/O slot. Standard bench testing is insufficient to validate module health; DriveKNMS employs a structured test protocol specific to the F-Series architecture:

• Backplane bus communication verification using HIMatrix-compatible test fixtures
• Channel-by-channel analog output calibration check (4–20 mA linearity, zero/span error)
• Diagnostic register readout to confirm no latched fault codes from prior installation
• Power rail isolation test to verify no cross-channel leakage on multi-fold output modules
• Firmware version identification and documentation for customer compatibility confirmation
• 48-hour burn-in cycle under simulated load conditions prior to shipment