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TRICONEX 3511 Digital Input Module
Product Overview
The TRICONEX 3511 is a high-reliability 16-channel digital input module designed for TRICONEX’s Tricon safety instrumented system (SIS), a critical platform for industrial safety and control. It serves as a key interface between field sensors (such as limit switches, pressure switches, and emergency stops) and the SIS controller, converting discrete on/off signals into digital data that the system uses to monitor equipment status and trigger safety actions. This functionality is essential for maintaining safe operations in high-risk industrial environments.
The TRICONEX 3511 supports 24V DC input signals, a standard in industrial settings, and features triple-modular redundancy (TMR) architecture. This design ensures that even if one channel fails, the module continues operating using the remaining two, preventing system shutdowns and enhancing reliability—a critical feature for applications requiring SIL 3 certification. Each channel includes galvanic isolation (250V AC) from the backplane, protecting against electrical noise and ground loops common in factories with heavy machinery.
As part of the Tricon ecosystem, the TRICONEX 3511 integrates seamlessly with components like the TRICONEX 3503E (main processor module), TRICONEX 3625 (power supply), and TRICONEX 3721 (digital output module). It operates in temperatures from 0°C to 60°C, resists dust, vibrations, and humidity, and is certified for use in hazardous areas (ATEX, IECEx). Its compact design (160mm × 100mm × 30mm) fits into standard Tricon racks, while LED indicators for each channel provide real-time status updates, simplifying troubleshooting.
Whether used in oil refineries, chemical plants, or nuclear power facilities, the TRICONEX 3511 ensures accurate and timely data collection, forming the foundation of robust safety systems that prevent accidents and protect personnel.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3511 |
| Manufacturer | TRICONEX |
| Product Type | 16-Channel Digital Input Module |
| Series | Tricon Safety Instrumented System |
| Number of Channels | 16 (single-ended) |
| Input Voltage | 24V DC (18–30V DC range) |
| Isolation | 250V AC (channels to backplane) |
| Safety Certification | SIL 3, IEC 61508, ATEX, IECEx |
| Physical Dimensions | 160mm (L) × 100mm (W) × 30mm (D) |
| Weight | 0.5 kg |
| Operating Temperature | 0°C to 60°C |
| Humidity Resistance | 5–95% non-condensing |
| Redundancy | Triple-Modular Redundancy (TMR) |
| Country of Origin | United States |
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Related Products
- TRICONEX 3503E: The main processor module of the Tricon SIS, which processes data from the 3511 to execute safety logic and trigger protective actions.
- TRICONEX 3625: A 24V DC power supply module that provides stable power to the 3511 and other Tricon components, ensuring continuous operation.
- TRICONEX 3721: A 16-channel digital output module that works with the 3511 in safety loops—input signals from the 3511 prompt the CPU to activate outputs like shutdown valves via the 3721.
- TRICONEX 3805E: An analog input module that complements the 3511 in mixed-signal systems, handling continuous variables (e.g., temperature) alongside the 3511’s discrete signals.
- TRICONEX 4351: A communication module that transmits data from the 3511 to SCADA systems, enabling remote monitoring of safety signals.
- TRICONEX 8312: A rack assembly that houses the 3511 and other modules, providing structural support and backplane connectivity for the Tricon system.
Main features and advantages
Triple-modular redundancy (TMR): The 3511 uses three independent channels to process signals. If one channel fails, the other two continue operating, ensuring no single point of failure. This design meets SIL 3 requirements, making it ideal for critical applications like oil refinery shutdown systems, where failure could lead to explosions or environmental damage.
Wide voltage compatibility: It accepts 18–30V DC inputs, matching most industrial sensors that use 24V DC. This compatibility eliminates the need for signal converters, simplifying wiring and reducing system complexity in plants with existing sensor networks.
Electrical isolation: Each channel features 250V AC isolation from the backplane, blocking electrical noise from motors, pumps, or welders. This ensures the 3511 only sends valid signals to the controller, preventing false safety triggers in noisy environments like chemical plants.
Industrial durability: The module operates in temperatures from 0°C to 60°C and resists dust, vibrations, and humidity. It performs reliably in harsh settings—from freezing LNG facilities to humid offshore platforms—reducing unplanned downtime.
Clear status monitoring: LED indicators on the front panel show the input status of each channel (on/off). This allows technicians to quickly identify issues like broken wires or faulty sensors without opening the rack, speeding up troubleshooting in emergency situations.
Easy integration with Tricon SIS: The 3511 fits directly into Tricon racks like the 8312, connecting to the backplane for power and data. It configures easily via TRICONEX’s TriStation 1131 software, with pre-built function blocks for common safety logic, reducing setup time.
Installation and maintenance
Pre-installation preparations: Power off the Tricon rack (e.g., 8312) before installing the 3511. Check that the rack has an open slot and that the power supply (e.g., 3625) provides 24V DC within the 18–30V range. Inspect the module for physical damage, ensuring connectors are clean and intact. Use an anti-static wristband to handle the module to avoid static damage to internal components.
Maintenance suggestions: Inspect the 3511 quarterly. Check for loose sensor connections and wipe dust from the surface with a dry cloth. Monitor LED indicators to ensure all channels show normal operation—flashing or off LEDs may indicate a sensor fault. Test input signals annually using a multimeter to verify accuracy. If faults persist after checking sensors, replace the 3511 following proper shutdown procedures to avoid disrupting the Tricon SIS, as sudden removal could trigger safety alarms.
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Application fields
The TRICONEX 3511 is widely used in high-risk industries requiring reliable safety monitoring:
In oil and gas production, it monitors emergency shutdown (ESD) buttons and pressure switch status on offshore platforms. If a sensor detects high pressure, the 3511 sends a signal to the 3503E CPU, which triggers valve closures via the 3721 module, preventing oil spills.
In chemical processing, the 3511 tracks the position of isolation valves in reactor systems. It ensures valves are fully closed during maintenance, sending alerts to the controller if a valve is accidentally opened—critical for preventing chemical leaks.
In nuclear power plants, it monitors coolant flow switches and emergency stop buttons. The module’s TMR design ensures it reliably transmits signals to the SIS, which shuts down reactors if unsafe conditions are detected, protecting workers and the environment.
In pharmaceutical manufacturing, the 3511 monitors door interlocks on clean rooms. It ensures doors remain closed during sterile processing, triggering alarms if breached to maintain compliance with safety regulations.
Product guarantee
Our company offers a one-year quality warranty service for the 3511, covering hardware malfunctions not caused by human factors. During the warranty period, if the product shows abnormal performance or functional failure, we will provide replacement services. In addition, for discontinued models or urgent demands, relying on our global supply chain network, we can quickly respond to customers’ procurement needs for scarce spare parts, and provide reliable services to support the continuous and stable operation of industrial systems.
Our company is a leading enterprise in the industrial control industry, established in 2007, has been 17 years. The company type is an import and export trade distribution company, mainly selling major brands of industrial control parts, there are many unpopular discontinued models, with a large stock. Our company has the advantage of supply channels, a large number of spot, to meet the needs of customers anxious to find spare parts. Our main business includes the distribution and trade of PLC modules, DCS cards, ESD system cards, vibration monitoring system cards, turbine control system modules, gas generator spare parts, instruments and other products.
Whatsapp:+86 18859254943
E-mail :sales@ygplc.com
E-mail :sales@ygplc.com
