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TRICONEX 3506X
TMR Digital Input Module
TMR Digital Input Module
Product Overview
The TRICONEX 3506X is a high-integrity Triple Modular Redundancy (TMR) digital input 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 signal acquisition from field devices such as switches, sensors, and emergency shutdown (ESD) actuators.
As part of TRICONEX’s TMR architecture, the TRICONEX 3506X ensures continuous operation even in the presence of component faults. It features 32 individually configurable input channels with a nominal voltage of 24 V DC, supporting an operational range of 18–32 V DC and a maximum transient voltage of 36 V DC . Each channel offers 1500 V DC isolation, protecting the system from electrical transients and ensuring signal integrity in harsh industrial environments, such as oil refineries, chemical plants, and nuclear power facilities.
The TRICONEX 3506X prioritizes safety and diagnostics, offering continuous 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 response time of <10 ms for all 32 channels, the module delivers rapid signal processing, critical for time-sensitive safety applications.
Technical Specifications
| Product model | TRICONEX 3506X |
|---|---|
| Manufacturer | TRICONEX |
| Product type | TMR digital input module |
| Input channels | 32 (non-commoned, isolated) |
| Nominal input voltage | 24 V DC |
| Operational voltage range | 18–32 V DC |
| Maximum transient voltage | 36 V DC |
| Input current | 6–9 mA |
| Point isolation | 1500 V DC |
| Power consumption | 3.2 W |
| Operating temperature | –40°C to +70°C (–40°F to 158°F) |
| Storage temperature | –40°C to +85°C (–40°F to 185°F) |
| Physical dimensions | 10.2 cm (width) × 14.6 cm (height) × 2.8 cm (depth) (4.0 in × 5.75 in × 1.1 in) |
| Weight | 1.1 kg (2.43 lbs) |
| Enclosure rating | IP20 (front panel) |
| Communication protocol | TRICONEX proprietary backplane bus |
| Safety certification | SIL 3 (IEC 61508) |
3506X
Related products
- TRICONEX 3501E: A 32-channel TMR digital input module with 115 V AC/DC input capability, suitable for higher-voltage applications.
- TRICONEX 3503EN: A 32-channel TMR digital input module optimized for 24 V DC signals, offering faster response time (≤5 ms).
- TRICONEX 3504E: A high-density TMR digital input module with 64 channels, designed for applications requiring maximum I/O capacity.
- TRICONEX DI3301: A 16-channel digital input module with lower isolation (500 V DC), suitable for non-safety-critical applications.
- TRICONEX T8431: A central processor module that executes safety logic based on data from modules like the TRICONEX 3506X.
- TRICONEX 3625: A power supply module providing stable 24 V DC power to ensure consistent operation of the TRICONEX 3506X.
- TRICONEX 3506X-E: An enhanced version of the TRICONEX 3506X with extended temperature range (-55°C to +85°C), ideal for extreme environments.
Main features and advantages
The TRICONEX 3506X 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 input integrity even if one channel fails . This design eliminates single points of failure, making it suitable for emergency shutdown systems (ESD), burner management systems (BMS), and fire and gas detection systems.
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 wide operating temperature range (-40°C to +70°C) ensures reliable operation in extreme conditions, from Arctic oil rigs to desert refineries.
The TRICONEX 3506X 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 32-channel configuration reduces the need for multiple modules, optimizing system cost and complexity.
3506X
Installation and maintenance
Pre-installation preparations: Before installing the TRICONEX 3506X, 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 input channel connected to the correct device (e.g., pressure switches, temperature sensors). 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 3506X 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 IP20 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 3506X is widely used in industries where safety and precision are paramount. In oil and gas production, it monitors pressure switches and flow sensors to trigger ESD valves, isolating leaks or overpressure events to protect personnel and the environment. In chemical plants, it collects signals from temperature switches and level sensors to manage reactor safety interlocks during batch operations. Power generation facilities rely on the module to monitor turbine vibration sensors and generator circuit breakers, preventing equipment failure and downtime.
Pharmaceutical manufacturing benefits from the TRICONEX 3506X’s reliability in controlling cleanroom access doors and sterilization equipment, ensuring compliance with strict regulatory standards. Water treatment plants use it to monitor pump statuses and flow meters, optimizing treatment efficiency. Its ability to handle high transient voltages (36 V DC) and support SIL 3 systems makes it a preferred choice for any application requiring fail-safe digital input control.
3506X
Product guarantee
Our company offers a one-year quality warranty for the TRICONEX 3506X, 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 3506X’s performance throughout its lifecycle.
WhatsApp: +86 18859254943
E-mail: sales@ygplc.com
E-mail: sales@ygplc.com
