HIMA,F3421
HIMA,F3421
HIMA,F3421
HIMA,F3421
HIMA,F3421
HIMA,F3421
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F3421

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The HIMA F3421 4-channel relay amplifier module provides four independent relay output channels for interfacing safety controllers with field devices such as valves and motors.
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Technical specifications for F3421

  • Manufacturer:
    HIMA
  • Part Number:
    F3421
  • Product Family:
    HIMA HIMatrix system
  • Product Type:
    4-Channel Relay Amplifier Module
  • Stock:
    12
  • Input Voltage:
    24VDC
  • Output:
    Normally Open Contact (NO)
  • Capacity:
    250 V AC / 30 V DC (Max 10A)
  • Isolation:
    2500 Vrms
  • Safety::
    SIL 2 / SIL 3
  • Temperature:
    -20°C to +60°C
  • Humidity:
    ≤ 90% RH
  • Protection:
    IP20
  • Mounting:
    DIN Rail
  • Weight:
    0.18 kg
  • Estimated shipping dimensions:
    2x18.8x12.8cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Performance Compatibility Application Scenarios

Features:

  • Four separate output channels allow flexible control of multiple field devices from a single module.
  • The 2500 Vrms isolation enhances protection between control circuits and external loads.
  • SIL 2 and SIL 3 capability supports applications requiring high operational integrity and dependable response.
Industrial safety systems often require dependable interfaces between controllers and field equipment, and HIMA F3421 fulfills this role efficiently. The module converts low-level control signals into relay outputs capable of driving external devices. Four independent channels provide flexibility when several actuators or alarms need to be controlled simultaneously. DIN rail mounting also simplifies cabinet integration.

Signal amplification is one of the key advantages of HIMA F3421. A 24 V DC input activates normally open relay contacts with switching capacities reaching 250 V AC or 30 V DC at up to 10 A. In addition, 2500 Vrms isolation improves protection against electrical interference. Combined with humidity tolerance up to 90% RH and operation from -20°C to +60°C, the module is suitable for demanding environments.

HIMA F3421 is widely used within HIQuad and HIQuad X safety automation platforms. Typical installations include emergency shutdown systems, fire and gas protection systems, burner management systems, and high-pressure protection systems. Facilities involved in oil and gas production, petrochemical processing, metallurgy, and power generation rely on such applications to maintain safe and continuous operation. Through dependable relay amplification, HIMA F3421 helps critical processes respond effectively to abnormal conditions.

The F3421 HIMA 4-Channel Relay Amplifier Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
HIMA F3421 4-Channel Relay Amplifier Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
HIMA F3421 4-Channel Relay Amplifier Module Specs

General

  • Manufacturer HIMA
  • Model F3421
  • Condition New Original ready stock
  • Product Family F3423
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Channel Configuration: Features 4 completely electrically independent signal processing and amplification channels.
  • Switching Capability: Single channel supports voltage switching up to 250 V AC or 30 V DC, with a maximum output current of 10 A.
  • Isolation Strength: High-voltage safety isolation protection up to 2500 Vrms between input and output.
  • Safety Certification: Hardware design complies with IEC 61508 standards, meeting SIL 2 or even SIL 3 safety integrity levels in industrial control environments.
  • Wide Temperature Operation: Operates stably within an extreme industrial temperature range of -40°C to +70°C.
  • System Integration: Fully compatible with HIMA ELOP II or SILworX engineering configuration software platforms.
  • Architecture Embedding: Seamlessly integrates into the standard racks of HIMA HIQuad (such as the H41q and H51q series) safety controllers.
  • Signal Input: Compatible with a wide range of low-level control logic signals from 5V DC to 24V DC.
  • Mechanical Installation: Adapts to universal standard DIN rail slots, making hardware installation and module replacement within the cabinet extremely convenient.
  • Emergency Shutdown: Deployed in ESD (Emergency Stop System) units in chemical plants and oil refineries for forced shut-off of critical valves.
  • Fire and Gas Monitoring: Serves as a safety interface to link alarms and sprinkler systems in F&G (Fire and Gas Monitoring and Protection System).
  • Combustion Control: Used in BMS (Combustion Management System) units of high-risk boilers and heating furnaces to perform rapid gas shut-off.
  • High Pressure Protection: Serves as the final safety actuator drive module in HIPPS (High Pressure Protection System) units of oil and gas pipelines.
Description
HIMA F3421 is a 4-channel relay amplifier module used as an interface between safety control systems and industrial field equipment. The module receives 24 V DC control signals and converts them into relay outputs with normally open contacts, allowing external devices to be actuated safely and efficiently. Each channel operates independently, making the module suitable for controlling multiple loads within one system.

With contact ratings up to 250 V AC or 30 V DC and a maximum switching current of 10 A, HIMA F3421 provides sufficient output capacity for various process applications. Electrical isolation of 2500 Vrms helps separate control circuits from field devices and improves system reliability. SIL 2 and SIL 3 compliance supports use in safety-related environments where dependable operation is essential. The module is designed for DIN rail installation and carries an IP20 protection rating for cabinet mounting.

HIMA F3421 is commonly integrated into HIQuad and HIQuad X safety systems used throughout process industries. Applications include emergency shutdown systems, fire and gas protection, burner management systems, and high-pressure protection systems. Petrochemical plants, offshore oil and gas facilities, steel production sites, and power generation installations benefit from the module's ability to drive valves, motors, alarms, and other critical devices while maintaining operational continuity.
Alternative Names
F342I F3423 F3417A F3430 F3349 F3331 F3330 F3322
Technical notes
HIMA F3421 4-channel relay amplifier module features a 24 V DC input, four independent normally open relay outputs rated up to 10 A, and 2500 Vrms isolation for SIL 2/SIL 3 safety applications.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why do many process plants select HIMA F3421?
High electrical isolation, SIL 2 and SIL 3 support, and four separate channels make the module suitable for critical industrial applications.
How does HIMA F3421 connect to external equipment?
Operation starts with a 24 V DC input signal, and the module switches normally open contacts capable of handling loads up to 250 V AC or 30 V DC.
Can HIMA F3421 control several devices at the same time?
Yes. Four independent channels allow simultaneous or separate control of four different loads.
Which industries commonly use HIMA F3421?
Petrochemical facilities, offshore oil and gas platforms, steel plants, and power generation systems frequently employ HIMA F3421 in safety-related processes.
Does HIMA F3421 support emergency shutdown applications?
Support for SIL 2 and SIL 3 enables HIMA F3421 to be applied in ESD, F&G, BMS, and HIPPS systems where reliable switching is required.