The F3335 is a safety-related digital output module from the HIQuad series, developed by HIMA Paul Hildebrandt GmbH, Germany. Designed specifically for functional safety and explosive atmospheres, it directly drives explosion-proof solenoid valves (Ex valves) and explosion-proof measuring transmitters (0/4-20 mA signals). It is widely used in Safety Instrumented Systems (SIS/ESD) in industries such as chemical, oil & gas, and pharmaceutical, supporting the control of equipment in potentially explosive atmospheres up to Zone 1 and above. It serves as a core unit for intrinsically safe driving of field devices in safety control systems.
Product Advantages
- Dual Certification for Explosion Protection and Safety ComplianceCertified to ATEX II (2) GD ([Ex ib] IIC/IIB, [Ex ib Db] IIIC/IIIB), and compliant with EN IEC 60079-0:2018 and EN 60079-11:2012 explosion protection standards. It also aligns with the functional safety architecture of the HIQuad system, meeting dual compliance requirements for industrial safety systems.
- Intrinsically Safe Driving CapabilityAs an associated apparatus, the module’s intrinsically safe output circuits can directly power field intrinsically safe devices without additional safety barriers. This simplifies system architecture, reduces wiring costs, and enables equipment control in Zone 1 hazardous areas.
- Wide Temperature Range and High-Reliability DesignSupports a wide operating temperature range of 0℃ to +60℃, adapting to complex industrial field conditions. Featuring a redundant power supply design and industrial-grade connectors, the module offers strong anti-interference performance, meeting the high reliability standards of HIMA safety products.
- Seamless System IntegrationDeveloped exclusively for HIMA HIQuad series safety controllers, it connects directly to the system backplane for seamless communication with the controller. It supports digital output control of 0/4-20 mA signals, compatible with mainstream field devices such as valves and transmitters.
Technical Parameters
Product Model: F 3335 (Order No.: 984333502)Product Series: HIQuad Safety Control SeriesCertification Standards: ATEX II (2) GD, [Ex ib] IIC/IIB; [Ex ib Db] IIIC/IIIB; EN IEC 60079-0:2018; EN 60079-11:2012Operating Temperature: 0℃ ~ +60℃Power Circuit UB1: Rated 24 V DC (-15% ~ +20%, max. 30 VDC); Test voltage Um=40V; Terminals: X1 z2 (L+)/d2 (L-)Power Circuit UB2: Rated 5 V DC (±10%, max. 6 VDC); Test voltage Um=40V; Terminals: X1 z6/d6 (+)/z30/d30 (-)Output Channels: 4 independent intrinsically safe digital outputs (Channel 1~4)Intrinsic Safety Parameters per Channel: Uo=25 V; Io=70 mA; Po=581 mW (trapezoidal wave); Co≤110 nF; Lo≤7 mHOutput Signal: Suitable for controlling explosion-proof valves and transmitters driven by 0/4-20 mAHazardous Area Suitability: Potentially explosive atmospheres of Zone 1 and aboveManufacturer: HIMA Paul Hildebrandt GmbH (Brühl, Germany)
Core Functions and Features
Intrinsically Safe Digital Output Control
The module features 4 independent channels that can directly drive solenoid valves, valve positioners, and 0/4-20 mA transmitters located in Zone 1 hazardous areas. Its intrinsically safe circuit limits output energy to prevent electric sparks and eliminate explosion risks from field devices.
Application scenarios: Emergency shutdown valves (ESD system) in chemical plants and safety shutdown valve control for oil & gas wellheads. It replaces the traditional solution of controller plus safety barrier, reducing potential failure points.
Dual Redundant Power Supply
The module is equipped with dual power circuits: 24 V DC (UB1) and 5 V DC (UB2), supporting a wide input voltage range. It fits common redundant power supply architectures in industrial sites, avoiding module shutdown caused by single power supply failure and improving system availability.
Application scenarios: Continuous production safety control loops in refining and chemical facilities, ensuring the module maintains critical output functions even under power fluctuation or single-circuit power failure.
Explosion-Proof Compliant System Integration
As an ATEX-certified associated apparatus, the intrinsic safety parameters of the module’s outputs are matched with field intrinsically safe devices (capacitance, inductance, voltage and current limitation). It can be deployed directly without additional explosion protection calculation and complies with European and international explosion-proof regulations.
Application scenarios: Pharmaceutical and fine chemical projects exported to Europe, meeting mandatory ATEX explosion-proof requirements for safety control systems.
LED Status Indication
The module panel is fitted with LED indicators (LED1~LED4) to visually display the operating status of each output channel (O1~O4, OR+, etc.). This allows on-site maintenance personnel to quickly identify channel faults and signal abnormalities, lowering system troubleshooting difficulty.
Application scenarios: During on-site commissioning and routine maintenance, signal faults in valve control loops can be rapidly located without upper computer software.
FAQ
Q1: Can the F3335 be installed directly in Zone 1 hazardous areas?A: No. The F3335 is an Associated Apparatus and does not have an explosion-proof enclosure for Zone 1 installation. It must be installed in a control cabinet located in a safe area (Zone 2 or non-hazardous area). It connects to intrinsically safe field devices in Zone 1 via intrinsically safe cables to realize isolation and driving of intrinsically safe signals.
Q2: What if the intrinsic safety parameters of the module do not match the field devices?A: First check whether the input capacitance (Ci) and inductance (Li) of the field device match the module’s specifications of Co ≤ 110 nF and Lo ≤ 7 mH. If out of range, replace with compatible field devices or add an intrinsic safety isolator in the loop. Ensure the intrinsic safety energy does not exceed the safety limit of field devices, and verify compliance through explosion protection calculation.
Q3: What is the voltage fluctuation range for module power supply?A: The 24 V DC power circuit (UB1) supports a fluctuation range of -15% ~ +20% of the rated voltage (20.4 V ~ 28.8 V DC), with a maximum withstand voltage of 30 V DC.The 5 V DC power circuit (UB2) supports ±10% fluctuation (4.5 V ~ 5.5 V DC), with a maximum withstand voltage of 6 V DC.The test voltage for both circuits is 40 V.
Q4: What is the difference between F3335 and other HIMA models such as F3330?A: The F3335 is specially designed for explosion-proof and intrinsically safe applications, with ATEX certification and intrinsic safety output parameters.The F3330 is a standard digital output module without intrinsic safety and explosion-proof functions. It cannot directly drive Zone 1 explosion-proof equipment and is only suitable for non-hazardous areas or low-risk Zone 2 areas.
Q5: What do the LED indicators on the module panel mean?A: LED1~LED4 correspond to the 4 output channels.O1~O4 indicate channel output status; OR+ indicates channel fault or loop abnormality.Steady LED light means normal channel output; blinking or off status requires inspection of power supply, wiring or field device conditions.
Q6: Can the hardware be replaced separately? Is reconfiguration required after replacement?A: Yes. The F3335 is a plug-and-play module for the HIQuad system. When replaced with the same model, the controller automatically identifies module parameters without program reconfiguration.Ensure the part number 984333502 is exactly the same, and confirm the ATEX certification of the new module is valid before replacement.
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