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TRICONEX 3700 Digital Output Module
Product Overview
The TRICONEX 3700 is a high-reliability digital output 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 the SIS controller and field devices, converting digital control signals from the controller into electrical outputs that activate equipment such as shutdown valves, alarms, and emergency stop mechanisms. This functionality is essential for executing safety-critical actions in high-risk industrial environments.
The TRICONEX 3700 supports 24V DC output signals 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 failures and meeting Safety Integrity Level (SIL) 3 requirements. Each channel includes galvanic isolation (250V AC) from the backplane, protecting against electrical noise and ground loops common in facilities with heavy machinery or electromagnetic interference.
As part of the Tricon ecosystem, the TRICONEX 3700 integrates seamlessly with components like the TRICONEX 3503E (main processor module), TRICONEX 3625 (power supply), and TRICONEX 3511 (digital input 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 3700 ensures precise and timely activation of safety devices, forming the foundation of robust safety systems that prevent accidents and protect personnel.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 3700 |
| Manufacturer | TRICONEX |
| Product Type | 16-Channel Digital Output Module |
| Series | Tricon Safety Instrumented System |
| Number of Channels | 16 (single-ended) |
| Output Voltage | 24V DC (18–30V DC range) |
| Output Current | 1A per channel, 8A per module |
| 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 |
TRICONEX 3700
Related Products
- TRICONEX 3503E: The main processor module of the Tricon SIS, which sends control signals to the 3700 to activate safety devices based on input data from sensors.
- TRICONEX 3625: A 24V DC power supply module that provides stable power to the 3700 and other Tricon components, ensuring continuous operation.
- TRICONEX 3511: A 16-channel digital input module that works with the 3700 in closed-loop safety systems—input signals from the 3511 trigger the controller to send outputs via the 3700.
- TRICONEX 3721: An analog input module that complements the 3700 in mixed-signal systems, providing continuous process data to the controller for informed output decisions.
- TRICONEX 4351: A communication module that transmits status data from the 3700 to SCADA systems, allowing remote monitoring of safety device activation.
- TRICONEX 8312: A rack assembly that houses the 3700 and other modules, providing structural support and backplane connectivity for the Tricon system.
- TRICONEX 3701: An upgraded version of the 3700 with enhanced output current capacity (2A per channel), suitable for high-power devices like large shutdown valves.
Main features and advantages
Triple-modular redundancy (TMR): The 3700 uses three independent channels to process and transmit output signals. If one channel fails, the other two maintain operation, eliminating single points of failure. This design meets SIL 3 requirements, making it critical for applications like oil refinery emergency shutdown systems, where failure could lead to explosions or environmental disasters.
Reliable output performance: Each channel delivers 24V DC at up to 1A, with a total module current limit of 8A, enabling control of devices from small alarms to mid-size solenoid valves. The 18–30V voltage range ensures compatibility with most industrial actuators, reducing the need for external signal boosters.
Electrical isolation: 250V AC galvanic isolation between channels and the backplane blocks electrical noise from motors, pumps, or welders. This prevents false activations of safety devices in noisy environments like chemical plants, where electromagnetic interference is common.
Industrial durability: The 3700 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 and maintenance costs.
Clear status monitoring: LED indicators on the front panel show the output status of each channel (on/off/fault). This allows technicians to quickly verify if a safety device has activated or if a channel is malfunctioning, speeding up troubleshooting during emergencies.
Seamless integration with Tricon SIS: The 3700 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 safety logic, reducing setup time by up to 30%.
TRICONEX 3700
Installation and maintenance
Pre-installation preparations: Power off the Tricon rack (e.g., 8312) before installing the 3700. 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 and gloves to handle the module, as static discharge can damage internal components. Align the module with the rack’s guide rails and secure it with M6 screws.
Maintenance suggestions: Inspect the 3700 quarterly. Check connections to field devices for looseness and wipe dust from the module’s surface with a dry cloth. Monitor LED indicators to ensure all channels show normal operation—flashing or off LEDs may indicate a wiring fault or device overload. Test output signals annually using a multimeter to verify voltage and current levels. If faults persist after checking connected devices, replace the 3700 following proper shutdown procedures to avoid disrupting the Tricon SIS, as sudden removal could trigger false safety alarms.
Application fields
The TRICONEX 3700 is widely used in high-risk industries requiring reliable activation of safety devices:
In oil and gas production, it controls emergency shutdown valves on wellheads and pipelines. For example, in onshore refineries, if the Tricon controller detects a gas leak via input from the 3511 module, it sends a signal to the 3700, which activates shutdown valves to isolate the leak, preventing fires or explosions.
In chemical processing, the 3700 operates alarm systems and ventilation fans. If a reactor’s temperature exceeds safe limits (detected by an analog sensor connected to the 3721 module), the controller uses the 3700 to trigger alarms and activate fans, protecting workers from toxic fumes.
In nuclear power plants, it controls emergency coolant injection valves. The 3700 receives signals from the 3503E processor to open valves if radiation levels rise, ensuring rapid response to prevent core meltdowns.
In pharmaceutical manufacturing, the 3700 activates door interlocks on sterile production areas. If a door is opened during batch processing (detected by a limit switch connected to the 3511), the controller uses the 3700 to lock the door and pause the process, maintaining compliance with safety regulations.
TRICONEX 3700
Product guarantee
Our company offers a one-year quality warranty service for the 3700, 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
