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HIMA SB3073-EX Safety Module
HIMA SB3073-EX
HIMA SB3073-EX is an intrinsic safety (IS) safety barrier module specially designed by HIMA for explosive hazardous environments. It belongs to HIMA’s series of explosion-proof safety products that have obtained ATEX and IECEx certifications. This module is mainly applied in process industry scenarios requiring the highest level of explosion-proof protection. Serving as a critical interface between the Safety Instrumented System (SIS) and on-site intrinsic safety equipment, it provides reliable safety signal isolation and energy limitation functions for hazardous areas in industries such as petrochemicals, natural gas processing, pharmaceuticals, and fine chemicals. Through precise energy-limiting circuits, SB3073-EX ensures that the electrical energy transmitted to hazardous areas always remains within a safe range, fundamentally preventing explosion accidents caused by electric sparks or thermal effects, and offering a perfect protection solution for the most dangerous areas such as Zone 0/1 and Division 1.
This safety barrier adopts advanced intrinsic safety technology, which can effectively process analog and digital signals and support the HART communication protocol to achieve seamless integration with intelligent on-site instruments. Its core value lies in a dual protection mechanism: it not only prevents on-site equipment in hazardous areas from becoming an ignition source but also protects the control system in safe areas from overvoltage or overcurrent impacts that may come from hazardous areas. The HIMA SB3073-EX module features high flexibility and configurability, supporting multiple signal types and ranges. It can be configured on-site via jumpers or DIP switches, which greatly simplifies engineering design and maintenance work, making it an ideal choice for building a complete intrinsic safety explosion-proof system.
Product Parameters
- Product Model: SB3073-EX
- Manufacturer: HIMA
- Product Type: Intrinsic Safety (IS) Safety Barrier
- Explosion-Proof Certifications: ATEX, IECEx, FM, CSA
- Applicable Areas: Zone 0/1/2, Division 1/2
- Input Signal: 4-20mA analog signal
- Supported Protocol: HART communication
- Number of Channels: Single channel
- Maximum Open-Circuit Voltage: 28 VDC
- Maximum Short-Circuit Current: 93 mA
- Loop Resistance: Maximum 850 Ω (when powered by 24VDC)
- Accuracy: ±0.1% FS
- Response Time: < 50 ms
- Operating Voltage: 18-30 VDC
- Power Consumption: Maximum 1.5 W
- Operating Temperature: -40°C to +70°C
- Protection Level: IP20
- Installation Method: DIN Rail Mounting
Structure and Composition
HIMA SB3073-EX adopts a robust modular design, with its housing made of high-strength flame-retardant material that meets the UL94 V-0 standard. The module has a compact size, suitable for high-density installation. The front end is equipped with a transparent flip-up label frame, facilitating channel identification and status checking. For wiring, detachable screw terminals are used, supporting 2.5mm² wires, and the wiring direction is horizontal incoming, which is convenient for wiring and management. At the bottom of the module, there is a set of DIP switches for configuring signal types, fault states, and HART communication functions.
The internal structure adopts a triple isolation design: complete electrical isolation between input, output, and power supply, with an isolation voltage of up to 1500VAC. The core components include an energy-limiting circuit, a signal conditioning unit, an isolation transformer, and a protection circuit. The energy-limiting circuit is composed of precision resistors, fuses, and Zener diodes, ensuring that the energy output to hazardous areas is always within a safe range. The signal conditioning unit uses high-precision operational amplifiers and ADC/D converters to provide accurate signal conversion and transmission. The isolation transformer realizes magnetoelectric isolation of signals, and the protection circuit includes overvoltage protection, overcurrent protection, and reverse polarity protection, ensuring that the module automatically enters a safe state under abnormal conditions.
Key Features and Advantages
- Highest Explosion-Proof Safety: It has obtained multiple certifications such as ATEX and IECEx, meeting the highest explosion-proof requirements of Zone 0 / Division 1. The precise energy-limiting circuit ensures that the output parameters are always below the ignition curve, providing absolute safety assurance for the most dangerous environments.
- Excellent Signal Accuracy: The high-precision signal transmission with ±0.1% ensures the accuracy of process control. Low ripple noise and excellent anti-interference ability guarantee the stability of signal transmission, making it particularly suitable for fine chemical processes.
- Complete HART Support: It fully supports the HART digital communication protocol and can be seamlessly integrated with intelligent transmitters, enabling remote configuration, diagnosis, and calibration functions without the need for additional installation of HART modems.
- Flexible Configurability: Signal types, fail-safe states, and HART parameters can be flexibly configured via DIP switches to adapt to different application needs. The modular design supports hot-swap replacement, greatly reducing system downtime.
Installation and Maintenance
Pre-Installation Preparation
Before installing HIMA SB3073-EX, it is necessary to confirm that the installation environment meets the explosion-proof requirements, and prepare appropriate DIN rails and installation tools. Check the explosion-proof certification of the power supply and the stability of the output voltage to ensure it is within the range of 18-30VDC. Confirm that the grounding system is reliable and the grounding resistance meets the explosion-proof requirements.
Maintenance Recommendations
Regularly check the tightness of the terminal blocks to ensure reliable connections. Observe the module status through the label frame and regularly check whether the DIP switch settings are correct. Keep the module clean and regularly remove dust. Before performing maintenance, it is necessary to ensure that gas detection has been carried out in the hazardous area and the area is confirmed to be in a safe state. When replacing the module, spare parts with the same model and parameter configuration must be used. After replacement, functional tests must be conducted to ensure the integrity of explosion-proof performance.
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Frequently Asked Questions (FAQs)
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Q: How does your warranty work?
A: Every product we offer comes with a 12-month warranty coverage to protect your purchase. Moreover, if you encounter any quality-related problems, you’re eligible for a return within 15 days—no complicated procedures required. -
Q: Some suppliers quote lower prices than yours.
A: Our commitment lies in “going the extra mile to solve customers’ order challenges,” not just competing on price alone. If you’ve received a more favorable quote elsewhere, share the details with us. We’ll work to match that price (where possible) while ensuring you still get our top-tier service and product quality. -
Q: We haven’t worked together before—what makes us trust your service?
A: We understand the importance of building trust from the start. For our first cooperation, we offer a flexible payment terms: pay a deposit to start production, and settle the remaining balance only after you confirm the goods are ready for delivery. This way, you’re in control every step of the way. -
Q: What shipping solutions do you provide?
A: We partner with global leading logistics services like TNT, DHL, FEDEX, EMS, and UPS to ensure fast and reliable delivery. Plus, if you have a preferred freight forwarder you’ve worked with before, we’re happy to coordinate with them to meet your specific shipping needs.
What Makes Us Your Ideal Partner?
- Top-tier quality assurance: Each product undergoes strict inspection to meet industry standards.
- Reliable on-time delivery: We prioritize timely order fulfillment to help you avoid production delays.
- Genuine branded parts supply: We stock a wide range of original, certified branded parts—no substitutes or counterfeits.
- Expert team & advanced testing: Our experienced staff and state-of-the-art testing facilities ensure products perform as expected.
- Ample inventory support: We maintain sufficient stock levels to fulfill your urgent orders quickly.
- 100% original new products: We never compromise on quality—all items are brand-new and authentic, guaranteed.
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