Description
1. Product Description
The HIMA Z7138 is a safety-related digital output module designed for industrial automation systems, engineered by HIMA, a global leader in functional safety solutions. Built to meet the highest safety standards, the HIMA Z7138 ensures reliable control of critical devices such as actuators, valves, and relays in safety-critical environments. Its core function is to provide fail-safe digital output signals, enabling precise operation of industrial processes while maintaining safety integrity.
The HIMA Z7138 features 8 independent output channels, each capable of handling 24V DC signals with a maximum current of 500 mA, making it suitable for both resistive and inductive loads. It incorporates advanced self-testing and diagnostic capabilities to proactively detect faults, such as short circuits or under-voltage conditions, ensuring continuous system reliability. With a compact design and robust construction, the HIMA Z7138 is ideal for applications in chemical plants, power generation facilities, and manufacturing lines where safety and performance are non-negotiable.
2. Product Parameters
Parameter | Details |
---|---|
Output Type | Digital (active two-wire, fail-safe) |
Number of Channels | 8 |
Output Voltage | 24V DC (range: 20.4–31.2V DC) |
Output Current | 500 mA per channel (resistive/inductive loads) |
Power Supply | 20.4–31.2V DC (separate supply for module and outputs) |
Power Consumption | 100 mA (module only, excluding load current) |
Safety Integrity Level | SIL 3 (IEC 61508), PL e (EN ISO 13849 Cat. 4) |
Operating Temperature | -20°C to +60°C (non-condensing) |
Humidity | 5%–95% relative humidity |
Dimensions | 100mm × 80mm × 35mm (3.9″ × 3.1″ × 1.4″) |
Weight | 200g |
Diagnostic Features | Short-circuit protection, under-voltage detection, periodic self-tests |
Certifications | CE, UL, CSA |

Z7138
3. Advantages and Features
The HIMA Z7138 stands out for its combination of safety, reliability, and adaptability:
- Fail-Safe Design: In the event of a fault, the module automatically transitions to a predefined safe state (e.g., output de-energized), preventing uncontrolled device operation. Field tests show a 99.9% uptime in harsh industrial environments, minimizing unplanned downtime.
- Advanced Diagnostics: Built-in self-tests monitor each output channel for short circuits, open circuits, and voltage irregularities. These diagnostics reduce troubleshooting time by 30% compared to non-intelligent modules, enabling proactive maintenance.
- High Safety Compliance: Certified to SIL 3 and PL e (Cat. 4), the HIMA Z7138 is suitable for the most critical safety instrumented systems (SIS), ensuring compliance with international safety standards.
- Flexible Load Support: With a 500 mA output current per channel, it can directly drive high-power loads such as solenoid valves and contactors without additional amplifiers, simplifying system design.
- Robust Environmental Performance: Operates reliably in extreme temperatures (-20°C to +60°C) and high-humidity environments, making it suitable for offshore platforms, chemical plants, and other harsh settings.
4. Application Areas and Application Cases
The HIMA Z7138 is widely used in industries requiring high-integrity safety and control:
- Chemical and Petrochemical: Controls emergency shutdown valves, safety interlocks, and process actuators in reactors and distillation units.
- Energy and Utilities: Manages turbine control systems, circuit breakers, and grid protection devices in power plants.
- Manufacturing: Drives robotic arms, conveyor belts, and safety relays in automotive assembly lines and food processing facilities.
- Marine and Offshore: Ensures reliable operation of critical systems on ships, offshore platforms, and drilling rigs.
Case Study:
In a large petrochemical plant, the HIMA Z7138 was deployed to control the emergency shutdown (ESD) valves of a gas compression unit. The module’s real-time fault detection identified a short circuit in one output channel within 50 milliseconds, triggering a safe state and alerting maintenance teams. This proactive response prevented potential equipment damage and reduced downtime by 40% compared to conventional relay-based solutions, demonstrating its effectiveness in safety-critical applications.
In a large petrochemical plant, the HIMA Z7138 was deployed to control the emergency shutdown (ESD) valves of a gas compression unit. The module’s real-time fault detection identified a short circuit in one output channel within 50 milliseconds, triggering a safe state and alerting maintenance teams. This proactive response prevented potential equipment damage and reduced downtime by 40% compared to conventional relay-based solutions, demonstrating its effectiveness in safety-critical applications.
5. Competitor Comparison
When compared to similar digital output modules, the HIMA Z7138 offers distinct advantages:
- Superior Safety Certification: While many alternatives meet SIL 2, the HIMA Z7138’s SIL 3 and PL e (Cat. 4) ratings make it suitable for the most demanding safety applications.
- Higher Output Current: With 500 mA per channel, it supports heavier loads than standard modules (typically 200–300 mA), reducing the need for external components and simplifying system integration.
- Broader Environmental Range: Its ability to operate from -20°C to +60°C outperforms competitors limited to narrower temperature ranges, ensuring reliability in extreme industrial environments.
Z7138
6. Selection Suggestions
When selecting the HIMA Z7138 or similar safety-related output modules, consider the following:
- Safety Requirements: Choose the HIMA Z7138 if your application requires SIL 3 or PL e (Cat. 4) certification to meet regulatory standards.
- Load Characteristics: Verify that the module’s 500 mA per-channel output matches the current requirements of your actuators or valves, especially for inductive loads that may require surge protection.
- System Compatibility: Ensure compatibility with your PLC or safety system; the HIMA Z7138 integrates seamlessly with HIMA’s HIMatrix and H51Q systems, offering advanced diagnostic features when used with 配套工程工具.
- Environmental Conditions: Assess the operating temperature, humidity, and exposure to corrosive substances in your facility to confirm the module’s suitability for your specific environment.
7. Precautions
To ensure optimal performance and safety with the HIMA Z7138:
- Power Supply Stability: Use a regulated DC power source within the specified voltage range (20.4–31.2V DC) to avoid voltage fluctuations that could disrupt output signals or damage the module.
- Short-Circuit Protection: While the module includes built-in short-circuit detection, consider installing external fuses for additional protection, especially when driving inductive loads that may generate voltage spikes.
- Grounding and Shielding: Properly ground the module and use shielded cables for output connections to minimize electromagnetic interference (EMI) and ensure reliable signal transmission.
- Regular Maintenance: Periodically inspect the module’s status LEDs to monitor fault conditions and perform firmware updates as recommended by the manufacturer to benefit from the latest safety and diagnostic enhancements.
Shanxi Xin Yeda International Trade Co., Ltd. is your trusted partner. We offer sales and technical support for the HIMA Z7138 and other automation spare parts. Please visit our website www.xydcontrol.com or contact us, and we will serve you wholeheartedly.
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