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Product Overview
The TRICONEX 2351 is a high-performance digital input module engineered for critical industrial safety and automation systems. Designed to interface with field devices such as switches, sensors, and relays, the TRICONEX 2351 converts raw digital signals into standardized data for processing by TRICONEX safety controllers. As a core component of TRICONEX’s fault-tolerant architecture, this module ensures reliable signal acquisition in hazardous environments, where signal integrity is paramount to preventing catastrophic failures.
With 16 isolated digital input channels, the TRICONEX 2351 supports voltage ranges of 24V DC ±10%, making it compatible with a wide array of industrial sensors and actuators. Its 2500V RMS galvanic isolation and 85 dB common-mode rejection protect against electromagnetic interference (EMI) and transient voltage spikes, ensuring stable operation in noisy industrial settings. The module’s fast 10 ms update rate enables real-time monitoring of safety-critical processes, while its built-in diagnostics provide proactive fault detection, minimizing downtime. Whether integrated into a new Safety Instrumented System (SIS) or retrofitted into an existing infrastructure, the TRICONEX 2351 delivers consistent performance, reinforcing TRICONEX’s reputation for excellence in safety-critical applications.
Technical Specifications
| Product model | TRICONEX 2351 |
|---|---|
| Manufacturer | TRICONEX |
| Product type | Digital input module |
| Physical dimensions | 130 mm (length) x 110 mm (width) x 75 mm (height) |
| Weight | 1.2 kg |
| Place of origin | United States |
| Input type | 16 isolated digital channels |
| Voltage range | 24V DC ±10% |
| Isolation | 2500V RMS galvanic isolation |
| Common-mode rejection | -85 dB (DC–100 Hz) |
| Update rate | 10 ms |
| Diagnostics | Built-in self-test (BIST) and channel-level fault indication |
| Power supply | 24V DC ±10% (separate from input power) |
| Operating temperature | -40°C to 70°C |
| Humidity tolerance | 5–95% non-condensing |
| Compliance | IEC 61508 SIL 3 (when integrated into a complete SIS) |
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Related products
- TRICONEX 3625: A 32-channel digital input module with higher channel density, suitable for applications requiring more inputs without additional rack space.
- TRICONEX 3401: A digital output module that complements the TRICONEX 2351 by providing discrete control signals for actuators, forming a complete I/O loop in safety systems.
- TRICONEX 2651: The primary processor module in TRICONEX SIS, which processes data from the TRICONEX 2351 to execute safety logic and control actions.
- TRICONEX 3700A: A rack assembly designed to house the TRICONEX 2351 and other modules, ensuring mechanical stability and backplane connectivity.
- TRICONEX 4416: A communication module that enables the TRICONEX 2351 to transmit data to remote monitoring systems via high-speed protocols like Modbus TCP/IP.
- TRICONEX 3703E: An isolated analog input module that works alongside the TRICONEX 2351 to provide comprehensive monitoring of both analog and digital signals in complex industrial setups.
Main features and advantages
Enhanced signal integrity: The TRICONEX 2351’s 2500V RMS galvanic isolation and 85 dB common-mode rejection effectively block EMI/RFI, ensuring accurate signal transmission even in environments with high electromagnetic noise, such as power plants or offshore rigs. This protection minimizes false trips and ensures the reliability of safety-critical decisions.
High-speed response: With a 10 ms update rate, the module delivers real-time data to the safety controller, enabling rapid response to process deviations. This is critical in applications like emergency shutdown systems (ESDs), where delays could lead to equipment damage or environmental hazards.
Rugged construction: The module’s industrial-grade design includes a reinforced casing and wide operating temperature range (-40°C to 70°C), making it suitable for harsh conditions in chemical plants, oil refineries, and nuclear facilities. Its IP65-rated housing also provides protection against dust and water ingress.
SIL 3 compliance: While the TRICONEX 2351 itself is not SIL-certified, it is part of TRICONEX’s SIL 3–capable SIS architecture, ensuring compliance with international safety standards when integrated into a complete system. This makes it ideal for applications where regulatory compliance is mandatory.
Modular scalability: The TRICONEX 2351’s compact design allows for easy integration into TRICONEX racks (e.g., TRICONEX 3700A), supporting scalable system configurations. Its compatibility with other TRICONEX modules (e.g., TRICONEX 3401, TRICONEX 2651) enables seamless expansion of I/O capabilities as production needs evolve.
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Installation and maintenance
Pre-installation preparations: Before installing the TRICONEX 2351, verify that the TRICONEX rack (e.g., TRICONEX 3700A) is properly grounded and mounted on a stable surface. Check the 24V DC power supply meets voltage requirements and inspect the module for physical damage (e.g., bent pins, cracked casing). Confirm compatibility with the system’s firmware version to avoid communication issues.
Installation steps: Align the TRICONEX 2351 with the designated slot in the rack, ensuring the backplane connectors engage fully. Secure the module with front-panel screws to prevent vibration-induced disconnections. Connect shielded cables from field devices to the terminal block, following the wiring diagram in the user manual. Route cables away from high-voltage lines to minimize interference.
Maintenance suggestions: Conduct quarterly visual inspections to check for loose connections or corrosion. Clean terminal blocks with a dry cloth to remove dust that could cause short circuits. Annually test input channels using a precision voltage source to ensure accuracy; recalibrate or replace the module if deviations exceed ±0.15% FSR. Monitor the module’s status LEDs for faults (e.g., red indicators), and address issues promptly using TRICONEX’s diagnostic tools.
Application fields
The TRICONEX 2351 is widely deployed in industries where reliable digital signal acquisition is critical:
- Oil and gas: In offshore platforms, the module monitors pressure switches and flow sensors in wellheads and pipelines, providing data for emergency shutdown systems (ESDs) to prevent hydrocarbon leaks. Its rugged design ensures operation in corrosive saltwater environments.
- Chemical processing: It detects valve positions and temperature alarms in chemical reactors, enabling closed-loop control to maintain safe process conditions and comply with environmental regulations. The module’s EMI resistance is particularly valuable in facilities with high-power equipment.
- Power generation: The TRICONEX 2351 supports steam turbine control by acquiring digital signals from overspeed sensors and emergency stop buttons, ensuring rapid shutdowns to prevent mechanical failure. Its wide temperature range makes it suitable for both indoor and outdoor installations.
- Pharmaceutical manufacturing: It monitors cleanroom access doors and sterilization equipment status, ensuring compliance with FDA and EU GMP standards. The module’s SIL 3 compatibility meets the stringent safety requirements of the pharmaceutical industry.
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Product guarantee
Our company offers a one-year quality warranty for the TRICONEX 2351, covering hardware malfunctions unrelated to misuse or improper installation. During the warranty period, defective modules will be replaced promptly to minimize downtime. For discontinued models or urgent requirements, our global supply chain network ensures rapid delivery of scarce parts like the TRICONEX 2351, supported by 17 years of expertise in industrial control solutions. Our technical team provides 24/7 assistance for installation guidance, troubleshooting, and firmware updates, ensuring seamless integration and long-term reliability.
Whatsapp:+86 18859254943
E-mail :sales@ygplc.com
E-mail :sales@ygplc.com
