HIMA F Series Modules: F7126 Power Supply,

Technical Dossier

Product Details And Specifications

HIMA F Series: Comprehensive Module Range and Technical Overview

The HIMA F Series represents one of the most widely deployed safety-rated programmable logic controller (PLC) platforms in global heavy industry. Certified to IEC 61508 SIL 3 and used extensively in chemical processing plants, nuclear power facilities, offshore oil and gas platforms, and petroleum refineries, the F Series has established a dominant installed base across Europe, the Middle East, and Asia-Pacific. Its modular rack-based architecture supports redundant CPU configurations, distributed I/O expansion, and high-availability power supply topologies — making it the reference platform for functional safety applications requiring continuous operation over multi-decade lifecycles.

The F Series operates within HIMA's broader HIMax and HIMatrix ecosystem, sharing a common engineering environment (SILworX) and compatible communication protocols including PROFIBUS-DP, Modbus TCP, and HIMA's proprietary safeethernet. Field installations routinely exceed 20 years of continuous operation, which creates sustained demand for spare parts, replacement modules, and lifecycle extension services.

The Evolution of F Series Architecture

The HIMA F Series was introduced in the 1990s as a successor to earlier relay-based and first-generation PLC safety systems. The original F Series used a VMEbus-derived backplane with dedicated safety CPUs and separate I/O racks connected via proprietary field buses. Early modules such as the F3330 CPU and F7000-range power supplies established the physical form factor and connector standards that persist across the entire product line.

In the mid-2000s, HIMA introduced the HIMax platform as the high-channel-count evolution of the F Series, retaining backward-compatible module pinouts while expanding to larger rack configurations (up to 64 slots). The HIMatrix line addressed smaller-footprint applications. Both platforms share the SILworX programming environment, enabling migration of application logic without full hardware replacement — a critical factor for plants seeking to extend system life without full rip-and-replace projects.

By the 2010s, the F Series entered a mature/sustaining phase. HIMA shifted primary development resources to the HIMax and HIMatrix platforms, while continuing to manufacture and support F Series modules for the installed base. Many F Series part numbers are now classified as long-lead or allocation items, making secondary-market sourcing from specialist distributors a standard procurement strategy for maintenance teams.

F Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced components within the HIMA F Series platform. Modules are categorized by functional type.

Power Supply Modules

• F7126: 24 VDC redundant power supply module for F Series main rack; supports hot-swap replacement without system shutdown.
• F7130: 115/230 VAC input power supply module; provides regulated DC bus voltage to F Series backplane.
• F7133: Extended-range power supply module; supports wide-input AC voltage for international grid compatibility.

CPU / Controller Modules

• F3330: Dual-channel safety CPU; executes SIL 3 application logic with 1oo2D voting architecture.
• F3336: High-performance safety CPU with expanded memory; supports large-scale application programs and fast scan cycles.
• F3338: Redundant CPU module for HIMax rack; paired configuration for fault-tolerant control.
• F8650E: Communication CPU module; manages safeethernet and Modbus TCP gateway functions.

Digital Input (DI) Modules

• F3236: 16-channel 24 VDC digital input module; SIL 3 rated with per-channel diagnostics.
• F3238: 32-channel 24 VDC digital input module; high-density I/O for large process installations.
• F3240: 16-channel 120 VAC digital input module; for field devices operating on AC supply rails.

Digital Output (DO) Modules

• F3422: 16-channel 24 VDC digital output module; solid-state outputs with short-circuit protection.
• F3424: 8-channel relay output module; for switching higher-current field loads including solenoid valves.
• F3426: 16-channel 24 VDC digital output module with diagnostics; supports SIL 2 output applications.

Analog Input (AI) Modules

• F3516: 8-channel analog input module; 4–20 mA / 0–10 V configurable; SIL 2 rated.
• F3518: 16-channel analog input module; supports thermocouple and RTD sensor types with cold-junction compensation.

Communication & Interface Modules

• F8621A: PROFIBUS-DP master/slave communication module; connects F Series rack to field device networks.
• F8627X: safeethernet communication module; enables peer-to-peer safety data exchange between HIMA controllers.
• F8628X: Modbus TCP gateway module; provides non-safety data access for DCS integration and historian connectivity.

Sourcing Hard-to-Find & Obsolete F Series Parts

DriveKNMS maintains a dedicated inventory of HIMA F Series modules, including part numbers that HIMA has classified as end-of-life or long-lead. For plants operating F Series systems beyond the original design lifecycle, sourcing replacement modules through the open market is frequently the only alternative to full system replacement — a project that can cost orders of magnitude more than a spare module procurement.

DriveKNMS sources F Series inventory through decommissioned plant equipment, authorized surplus channels, and direct manufacturer relationships. All modules are inspected, tested, and documented before dispatch. For critical spares such as the F7126 power supply, F3330 CPU, and F3236 digital input modules, DriveKNMS maintains buffer stock to support emergency breakdown requirements with short lead times.

Customers operating HIMA F Series systems in sustaining mode — where the primary objective is maximum uptime with minimum capital expenditure — are encouraged to submit a full bill of materials (BOM) for a comprehensive spare parts quotation.

Quality Control for the F Series Range

HIMA F Series modules incorporate complex backplane connectors, dual-channel internal architectures, and safety-rated bus communication circuits that require specialized test procedures beyond standard power-on verification. DriveKNMS applies the following quality control protocol to all F Series inventory:

• Visual and mechanical inspection: Connector pin integrity, PCB condition, conformal coating assessment, and label verification against HIMA part number databases.
• Powered functional test: Each module is installed in an F Series test rack and powered under controlled conditions. CPU modules execute a diagnostic self-test sequence; I/O modules are exercised across all channels using calibrated signal sources and loads.
• Backplane communication verification: Modules are confirmed to communicate correctly on the F Series internal bus, including response to rack controller polling and error-free data exchange.
• Power supply load test: Power supply modules including the F7126 are tested under rated load conditions, with output voltage stability and ripple measured against HIMA specifications.
• Documentation package: Each dispatched module is accompanied by a test report, photographic record, and traceability documentation.