Triconex 3000120-380 DI External Terminator

The Triconex 3000120-380 DI External Terminator is an industrial-grade device designed for use in Triconex safety systems to ensure signal integrity and reliable operation of digital input (DI) modules. This terminator acts as the external endpoint for DI signals, providing proper electrical termination, noise suppression, and signal conditioning, which is critical in large-scale and safety-critical automation networks.

Engineered to integrate seamlessly with Triconex 3000 series DI modules, the 3000120-380 ensures that all input signals are accurately recognized by the system while preventing false triggers caused by electrical reflections or interference. It is widely used in industries where precise monitoring of safety-critical digital signals is mandatory, such as oil and gas, petrochemical plants, power generation, and chemical processing facilities.

The 3000120-380 DI External Terminator also simplifies maintenance by providing clear diagnostics for connected inputs, making it easier for engineers to troubleshoot and maintain high-reliability systems. Its compact, robust design allows installation in harsh industrial environments without compromising performance.

Product Specifications

Applications

The 3000120-380 DI External Terminator is used in numerous industrial and safety-critical applications:

• Oil and Gas Platforms – Termination of DI signals for emergency shutdown (ESD) and fire-and-gas detection systems.

• Petrochemical Facilities – Integration with safety instrumented systems (SIS) for leak detection and critical interlocks.

• Power Generation Plants – Monitoring turbine trips, boiler alarms, and auxiliary equipment status.

• Chemical Processing Plants – Accurate detection of valve positions, level switches, and flow interlocks.

• Mining and Metals – Reliable detection of critical equipment status for automated shutdown sequences.

• Nuclear and High-Safety Facilities – Providing signal integrity in systems requiring SIL-certified digital input termination.

Advantages

The Triconex 3000120-380 DI External Terminator offers several key technical and operational advantages:

• Reliable Signal Termination – Prevents signal reflections and false triggering in DI networks.

• Enhanced Diagnostics – LED indicators allow quick detection of signal faults and ease troubleshooting.

• High Compatibility – Designed to integrate seamlessly with Triconex 3000 DI modules and safety systems.

• Compact and Robust Design – Suitable for installation in harsh industrial environments with limited space.

• SIL Compliance – Compatible with SIL 3-rated systems, supporting safety-critical applications.

• Noise Immunity – Reduces electromagnetic interference (EMI) impact on DI signal integrity.

• Simplified Maintenance – Modular design allows quick replacement without disrupting system operations.

FAQ

1. What type of signals can the 3000120-380 handle?

   It handles dry contact and sourced digital input signals from standard field devices.

2. How does the terminator prevent signal reflection?

   It provides proper electrical termination with a controlled resistance of 100 Ohms at the DI endpoints.

3. Is the device compatible with all Triconex DI modules?

   It is compatible with standard Triconex 3000 series DI modules that require external termination.

4. How are diagnostic signals displayed?

   Each input line has an LED indicator showing its active status and potential signal faults.

5. Can the terminator be installed in a DIN rail system?

   Yes, it supports DIN rail or panel mounting for flexible installation.

6. How does it handle noisy industrial environments?

   The device is designed with noise suppression circuitry to maintain signal integrity under EMI conditions.

7. Can it be used in SIL 3 systems?

   Yes, it is fully compatible with SIL 3-rated systems, ensuring compliance with IEC61508.

8. What is the recommended installation distance from the DI module?

   Typically, it should be installed as close as possible to the last DI field device to minimize signal degradation.

9. How does it affect system maintenance?

   Its modular design and LED diagnostics allow quick replacement and fault detection without system downtime.

10. Does it require a separate power supply?

    No, it operates using the 24 VDC supply from the connected DI module or field devices.