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TRICONEX 3401S2
Digital Output Module
Digital Output Module
Product Overview
The TRICONEX 3401S2 is a high-integrity digital output module engineered by TRICONEX, a global leader in safety instrumented systems (SIS) and industrial automation. Designed for mission-critical applications, this module serves as a core component of the TRICONEX Tricon and Tricon CX safety systems, delivering reliable control signals to field devices such as solenoid valves, motor starters, and emergency shutdown (ESD) actuators.
As part of TRICONEX’s triple modular redundancy (TMR) architecture, the TRICONEX 3401S2 ensures continuous operation even in the presence of component faults. It features 16 individually configurable output channels with a nominal voltage of 24 V DC, supporting an operational range of 15–30 V DC and a maximum transient voltage of 33 V DC . This flexibility makes it ideal for applications requiring precise control in harsh environments, such as oil refineries, chemical plants, and nuclear power facilities.
The TRICONEX 3401S2 prioritizes safety and diagnostics, offering loop-back verification and real-time fault detection for each channel. Its built-in self-test (BIST) and diagnostic glitch detection (≤2 ms) enable proactive maintenance, minimizing downtime and ensuring compliance with international safety standards like IEC 61508 (SIL 3) . With a scan time of <1 ms for all 16 channels, the module delivers rapid response to control commands, critical for time-sensitive safety applications.
Technical Specifications
| Product model | TRICONEX 3401S2 |
|---|---|
| Manufacturer | TRICONEX |
| Product type | Digital output module |
| Output channels | 16 (commoned) |
| Nominal output voltage | 24 V DC |
| Operational voltage range | 15–30 V DC |
| Maximum transient voltage | 33 V DC |
| Output current (switching) | <4.8 A (self-limiting), 3.0 A (typical) |
| Diagnostic scan time | <1 ms (all channels) |
| Operating temperature | –40°C to +85°C (–40°F to 185°F) |
| Physical dimensions | 4.5 cm (width) × 18.8 cm (height) × 20.8 cm (depth) (1.77 in × 7.40 in × 8.19 in) |
| Weight | 1.4 kg (3.09 lbs) |
| Enclosure rating | IP67 (dust and water ingress protection) |
| Isolation | 500 V DC (functional to protective earth), 800 V DC (functional to logic ground) |
| Communication protocol | TRICONEX proprietary backplane bus |
| Safety certification | SIL 3 (IEC 61508) |
3401S2
Related products
- TRICONEX DO3301: A 16-channel digital output module with similar SIL 3 certification but lower output current (1.5 A), suitable for applications requiring basic control signals.
- TRICONEX DO3401: A redundant 16-channel digital output module offering enhanced fault tolerance, ideal for 24/7 continuous operation.
- TRICONEX DI3301: A digital input module that complements the TRICONEX 3401S2 by collecting discrete signals (e.g., switch states), enabling comprehensive system monitoring.
- TRICONEX AI3301: An analog input module for monitoring continuous variables (e.g., 4–20 mA), expanding the system’s ability to handle mixed signal types.
- TRICONEX T8431: A central processor module that executes safety logic based on data from modules like the TRICONEX 3401S2.
- TRICONEX 3625: A power supply module providing stable 24 V DC power to ensure consistent operation of the TRICONEX 3401S2.
- TRICONEX DO3402: An upgraded version with faster response time (≤0.5 ms) and advanced EMI immunity for high-speed industrial processes.
Main features and advantages
The TRICONEX 3401S2 excels in safety-critical environments, leveraging its SIL 3 certification to ensure reliable performance in applications where failure could lead to catastrophic consequences. Its triple modular redundancy (TMR) architecture includes three independent sets of electronics and quad voter circuitry, allowing two-out-of-three signal voting to maintain output integrity even if one channel fails . This design eliminates single points of failure, making it suitable for emergency shutdown systems (ESD) and burner management systems (BMS).
Another key strength is its advanced diagnostic capabilities. The module performs continuous loop-back verification to validate signal integrity and detects faults such as open circuits, shorts, or loss of field power within milliseconds . Its diagnostic glitch duration is ≤2 ms (500 µs typical), enabling rapid troubleshooting and reducing mean time to repair (MTTR). Additionally, the IP67-rated enclosure and wide operating temperature range (-40°C to +85°C) ensure reliable operation in extreme conditions, from offshore platforms to high-temperature chemical reactors.
The TRICONEX 3401S2 offers flexible integration with TRICONEX’s Tricon and Tricon CX systems via the proprietary backplane bus, supporting hot-swappable module replacement without system downtime. Its compact form factor and DIN rail/rack mounting compatibility simplify installation in space-constrained control cabinets, while the 16-channel configuration reduces the need for multiple modules, optimizing system cost and complexity.
3401S2
Installation and maintenance
Pre-installation preparations: Before installing the TRICONEX 3401S2, verify that the TRICONEX system rack supports the module’s physical dimensions and power requirements (24 V DC). Inspect the module for physical damage and ensure field wiring is properly terminated and labeled, with each output channel connected to the correct device (e.g., solenoid valves, motor contactors). Grounding must comply with local electrical codes to prevent interference, and the mounting surface should be clean and level to ensure proper heat dissipation.
Maintenance suggestions: Regularly monitor the TRICONEX 3401S2 using TRICONEX system software to review diagnostic reports and channel statuses. Inspect terminal block connections quarterly for tightness and corrosion, as loose connections can cause signal degradation. In dusty environments, use compressed air (low pressure) to clean the module’s vents and connectors, ensuring the IP67 seal remains intact. Avoid exposing the module to temperatures beyond its rated range, and use anti-static wristbands during maintenance to prevent electrostatic discharge (ESD) damage. For faults, refer to the TRICONEX troubleshooting guide; do not attempt to open the module, as this voids the warranty.
Application fields
The TRICONEX 3401S2 is widely used in industries where safety and precision are paramount. In oil and gas production, it controls ESD valves to isolate leaks or overpressure events, ensuring personnel and environmental protection. In chemical plants, it manages reactor agitators and process valves to maintain safe reaction conditions during batch operations. Power generation facilities rely on the module to monitor turbine trip systems and generator circuit breakers, preventing equipment failure and downtime.
Pharmaceutical manufacturing benefits from the TRICONEX 3401S2’s reliability in controlling cleanroom access doors and sterilization equipment, ensuring compliance with strict regulatory standards. Water treatment plants use it to activate chemical dosing pumps and monitor flow control valves, optimizing treatment efficiency. Its ability to handle high transient voltages (33 V DC) and support SIL 3 systems makes it a preferred choice for any application requiring fail-safe digital output control.
3401S2
Product guarantee
Our company offers a one-year quality warranty for the TRICONEX 3401S2, covering hardware malfunctions not caused by misuse or improper installation. During the warranty period, we provide prompt replacement services for modules exhibiting abnormal performance or functional failure. For discontinued models or urgent demands, our global supply chain network ensures rapid procurement of scarce spare parts, minimizing downtime and supporting continuous industrial operations. Our technical support team is available to assist with installation guidance, firmware updates, and troubleshooting, ensuring customers maximize the TRICONEX 3401S2’s performance throughout its lifecycle.
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
E-mail: sales@ygplc.com
