Safety Relay Solution – HIMA F3421 | F3400 Series
Where This Product Is Used
The HIMA F3421 Relay Amplifier is deployed in safety-instrumented systems (SIS) across industries where process integrity and personnel protection are non-negotiable. Typical installation environments include:
- Oil & Gas: Emergency Shutdown (ESD) systems, wellhead control panels, and pipeline isolation logic solvers
- Petrochemical & Refining: Burner Management Systems (BMS), high-integrity pressure protection systems (HIPPS)
- Power Generation: Turbine trip circuits, boiler safety interlocks, and generator protection relays
- Chemical Processing: Reactor safety loops, toxic gas detection output stages, and valve actuator interfaces
- Offshore Platforms: Fire & Gas (F&G) system output modules, deluge valve control
- Water & Wastewater: Pump protection interlocks and critical valve control
Engineers specify the F3421 wherever a certified, galvanically isolated relay output is required between a HIMA safety controller and field actuators such as solenoid valves, contactors, and motor starters.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | F3421 |
| Series | HIMA F3400 |
| Module Type | Relay Amplifier / Digital Output |
| Safety Integrity Level | SIL 2 (single), SIL 3 (redundant) |
| Output Channels | 16 relay outputs |
| Output Contact Type | Normally Open (NO) / Normally Closed (NC) |
| Rated Switching Voltage | 24 V DC / 230 V AC |
| Rated Switching Current | Up to 2 A per channel |
| Isolation | Galvanic isolation, channel-to-channel and channel-to-bus |
| Supply Voltage | 24 V DC (via backplane) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Weight | 180 g |
| Mounting | HIMax / HIMatrix backplane slot |
| Dimensions (W × H × D) | Per HIMA F3400 series form factor |
| Certifications | TÜV, IEC 61508, ATEX (Zone 2 with barrier) |
Why Engineers Specify This Model
- Certified SIL 2/3 Performance: TÜV-assessed to IEC 61508, enabling direct use in safety loops without additional proof-test overhead
- Galvanic Isolation: Eliminates ground loops and protects the safety controller from field-side transients and fault currents
- Hot-Swap Capability: Modules can be replaced under power in HIMax architectures, minimizing planned downtime during maintenance windows
- Diagnostic Coverage: Integrated self-test routines report relay weld detection and coil faults back to the safety CPU, supporting high diagnostic coverage (DC) requirements
- Compact 16-Channel Density: Reduces rack space and wiring complexity compared to discrete relay panels
- Proven Field Record: Widely deployed in HIMA-based SIS installations globally since the F3400 series introduction
- Seamless HIMax/HIMatrix Integration: Plug-and-play with HIMA’s engineering tools (SILworX / ELOP II), no additional configuration hardware required
Complete System Bill of Materials
A typical HIMA safety output stage using the F3421 includes the following components. Konmask.com can source all items:
- HIMA F3421 — Relay Amplifier Module (this item)
- HIMA HIMax Central Processing Unit (e.g., F8650E / F8651E)
- HIMA HIMax Power Supply Module (e.g., F8621A)
- HIMA HIMax Backplane / Rack (appropriate slot count)
- HIMA F3330 / F3336 — Digital Input Module (for feedback signals)
- Field wiring terminals and cable shields per HIMA wiring guidelines
- Solenoid valves / contactors rated for relay output specifications
- Surge protection barriers (if ATEX Zone 1 field devices are connected)
Contact support@konmask.com for a complete BOM quotation tailored to your project.
Compliance & Industry Standards
- IEC 61508: Functional Safety of E/E/PE Safety-related Systems (SIL 2 / SIL 3)
- IEC 61511: Functional Safety for the Process Industry Sector
- ATEX Directive 2014/34/EU: Suitable for Zone 2 hazardous area installations (with appropriate barriers)
- TÜV Rheinland Certification: Independent third-party safety assessment
- EN 61000 (EMC): Electromagnetic compatibility for industrial environments
- RoHS Compliant: Restriction of Hazardous Substances
Quality Assurance & Sourcing
Konmask.com specializes in the procurement of industrial automation components from verified supply chains. Every HIMA F3421 unit we supply undergoes the following process:
- Source Verification: Units are sourced from authorized distributors, OEM surplus channels, or certified refurbishers — never from unverified grey-market brokers
- Visual & Functional Inspection: Each module is inspected for physical integrity, label authenticity, and connector condition prior to dispatch
- Documentation Package: Available upon request — includes test reports, certificate of conformity, and traceability records
- Warranty: 90-day replacement warranty against DOA (Dead on Arrival) defects
- Packaging: Anti-static ESD packaging with foam insert protection for international shipping
How to Source This Part
- Add to Cart — Place your order directly on this page for in-stock units
- Request a Quote — Email support@konmask.com with your required quantity, delivery timeline, and project details
- Phone / WhatsApp — Call or message +0086 19859288691 for urgent requirements or technical pre-sales questions
- Bulk / Project Orders — We offer volume pricing for system integrators and EPC contractors. Provide your BOM for a consolidated quote
- Lead Time — In-stock units ship within 1–3 business days. Ex-stock international delivery via DHL / FedEx with tracking
Application-Specific FAQ
Q: Can the F3421 be used in a 1oo2 (one-out-of-two) voting architecture?
A: Yes. When paired with a HIMax CPU configured for 1oo2 or 2oo3 logic, the F3421 relay outputs can be wired in series or parallel to achieve the required voting behavior for SIL 3 loops.
Q: Is the F3421 compatible with both HIMax and HIMatrix platforms?
A: The F3421 is designed for the HIMax backplane. HIMatrix systems use a different module form factor. Please confirm your platform before ordering — contact us if unsure.
Q: What is the relay contact life expectancy?
A: HIMA specifies mechanical life at >10 million operations and electrical life dependent on load type. For solenoid valve applications at rated current, plan for periodic proof-testing per your SIL verification report.
Q: Can I get a Factory Acceptance Test (FAT) report for this module?
A: Documentation availability depends on the specific unit’s provenance. Contact us prior to purchase to confirm what records are available for your compliance requirements.
Q: Do you offer exchange / repair services for faulty F3421 modules?
A: Yes. We can facilitate exchange programs for defective units. Contact support@konmask.com with your fault description and serial number.
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Contact: support@konmask.com | +0086 19859288691
