TRICONEX 3902AX

As the “eyes” of the Triconex safety system, it detects dangerous conditions on site (such as excessive pressure and low liquid level) and transmits them to the central processor so that the system can perform predetermined safety actions (such as closing valves and stopping pumps).

1. Key Features and Advantages
Triple Modular Redundancy

This is its core feature. The module integrates three independent input circuits.

These three circuits simultaneously monitor the same field signal and perform a “two out of three” vote. The signal status is confirmed only when at least two of the three circuits reach consensus.

Advantages: This significantly improves system safety and availability. Even if one channel fails, the system can still make the correct decision based on the other two functioning channels, preventing unnecessary downtime and preventing loss of protection due to a single point of failure.

High Safety and Reliability

Designed for safety-critical applications, these modules comply with IEC 61508 and IEC 61511 standards.

Often certified to SIL 3, they are suitable for the most demanding safety applications.

Diagnostics and Maintenance

The modules feature powerful internal diagnostic capabilities, enabling real-time detection of internal circuit faults such as channel shorts, opens, and component failures.

Benefits: Facilitates predictive maintenance by issuing alerts before faults impact production, allowing repairs to be performed during planned downtimes and maximizing plant uptime.

Hot-Swap Capability

Supports online replacement of faulty modules without interrupting system power or downtime.

Benefits: Significantly reduces maintenance time and production losses, improving plant operational efficiency.

High Density

Typically provides 32 or 64 high-density input channels, saving cabinet space and costs.

2.Technical Specifications Summary
Input Type: Digital (dry or active)

Number of Channels: Typically 32 or 64 channels (depending on the model suffix)

Backplane Compatibility: Designed to plug into Triconex racks, such as the 3008 and 3510, and communicate with the host processor via the backplane.

Communication Protocol: Utilizes Triconex’s proprietary TriStation software for configuration, programming, and monitoring.

Certification: Typically SIL 3 certified by TÜV Rheinland.

3. Typical Application Industries
The TRICONEX 3902AX and its Triconex system are widely used in process industries with extremely high safety requirements, including:

Oil and Gas: Offshore platforms, refineries, and pipelines

Chemical and Petrochemical

Power plants (especially non-nuclear safety islands in nuclear power plants)

Pharmaceutical industry

Other industries requiring high-availability and high-safety control

Sales of the brand:

ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.

Frequently Asked Questions:
1. How long does it take to receive the goods?
We have stock in stock and can accept same-day payment and delivery!

2. What payment methods do you accept?
There are many methods (T/T…) for you to choose from, and you can choose whatever you want.

3. Is there after-sales service?
Of course, if our products are brand new, they have a one-year warranty!

4. What courier services do you accept? We offer SF Express, DHL, and other international express delivery options.

5. How can I contact you?

You can contact me 24/7 via WeChat, Skype, WhatsApp, LINE, and my email!

Company Profile

Xingchuang Ronghe (Fuzhou) Electric Co., Ltd. is a company specializing in the sales and technical services of spare parts for the world’s top industrial automation systems. With our profound industry experience and stable supply channels, we provide domestic and foreign customers with original, authentic, complete models, and fast-delivered precision spare parts solutions. We are your reliable partner in ensuring production continuity and stability.

We specialize in distributing the following core brands and product lines:

ABB

•  Process Control: ABB DCS process control system full range of components.
• ABB FreeLance AC800F power modules: SA801F/SA811F/SD802F/SD812F, EI811F/ABB EI812F/ABB EI813F, etc.
• ABB S800 analog I/O modules: AI801/AI810/AI825/AO801/AO845/AO895
• ABB S800 digital I/O modules: DI801/DI810/DO801/DO810

Bently Nevada
3500 Module Mainboards: 3500/42, 3500/45, 3500/40, 3500/50, etc.
(CPU Modules): 3200/32, 3500/25
3500 Module Minimum Cards: 128229-01, 128229-01, 133442-01, 125800-01, 167699-02, etc.
Extension Cables: 330850-50-05 (for preamplifier), 330730-040-00-00, 330103-00-06-10-02-00, etc.

EPRO

•  MMS6000 TSI System: MMS6110/MMS6210/MMS6220 series monitoring modules.
  Sensors: Proximitor sensors CON011, CON021, CON031, etc

GE

• PLC Systems: IC693, IC695, and IC697 Series Modules.
• Drives and Protection: GE DRIVE SYSTEMS Series Inverters, SR Integrated Protection Frame Series.

Rexroth

• Drives and Motors: Full range of Rexroth servo drives and controllers; models include: servo motor 2AD160B-B0350R2-BS03-D2V1, MSK040C-0600-NN-M1-UP1-NSNN, etc.
• Rexroth communication boards and amplifier boards: MTS-P01.2-D2-B1-E1-NN-NN-FWEP, VT-VPCD-1-1X/V0/1-0-1, VT5006-17B, etc.

Siemens

· Process Instruments and Controllers: Siemens MOORE series, common models include: QLCDM024DCBAN, 39ACM24BEN, 39AC12T4V1, 16114-171, etc.
· Automation Systems: Full range of SIMATIC S5 PLCs, SIMATIC S7-400 CPU modules and expansion modules, Simatic C7 systems, and various Siemens touch screens.