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Product Overview
The Invensys Triconex 3301 Digital Input (DI) Module is a high-performance component designed for industrial control systems, particularly within the Triconex safety instrumented systems (SIS). It facilitates the reliable acquisition of discrete signals from field devices such as sensors, switches, and relays, ensuring accurate monitoring and control of industrial processes.
Technical Specifications
Below is a table summarizing the key technical specifications of the Triconex 3301 DI Module:
| Specification | Details |
|---|---|
| Input Channels | 32, commoned |
| Nominal Input Voltage | 24 V DC |
| Operational Voltage Range | 15–30 V DC |
| Absolute Maximum Input Voltage | 33 V DC |
| Absolute Maximum Reverse Voltage | –0.6 V DC |
| Input Delay | <10 ms (On to Off or Off to On) |
| Time Constant (TC) | 6.4 ms, –3dB @ 25 Hz |
| Input Impedance | >30 kΩ without baseplate; ≈3 kΩ with baseplate |
| Input Power Consumption | 0.2 W/point @ 24 V DC; 0.5 W/point @ 33 V DC |
| Input Thresholds | 0–5 V DC = Off; 6–14 V DC = Transition; 15–30 V DC = On |
| Diagnostic (Loss of View) | Force-to-value diagnostic (FVD), <2 ms/test |
| Maximum Input Toggle Rate | <20 per second to maintain diagnostic fault coverage |
| FVD Off-State Glitch | Duration: <2 ms; Magnitude: ≈36% test voltage |
| Output Impedance (0–5 V DC) | ≈100 kΩ |
| ADC Scan Time | <1 ms for all 32 points |
| Functional-to-Protective-Earth Isolation | 500 V DC, minimum |
| Functional-to-Functional-Earth (Logic) Isolation | 800 V DC, minimum |
| Dimensions (L x W x H) | 160 x 85 x 50 mm |
| Weight | 1.42 kg |
Applications
The Triconex 3301 DI Module is utilized across various industrial sectors for:
- Process Safety: Monitoring critical parameters to ensure safe industrial operations.
- Fire and Gas Detection: Promptly detecting and responding to fire and gas incidents to protect personnel and assets.
- Emergency Shutdown Systems: Automatically initiating shutdown procedures during emergencies to prevent damage and ensure safety.
- Turbomachinery Control: Monitoring and controlling turbomachinery operations to maintain optimal performance.
- Pipeline Protection: Safeguarding pipelines against anomalies to prevent environmental damage and ensure operational reliability.
Advantages
Key advantages of the Triconex 3301 DI Module include:
- High Reliability: Fault-tolerant design with redundancy features ensures continuous operation, even in the event of component failures.
- Diagnostic Capabilities: Equipped with real-time monitoring and analysis tools that enable proactive maintenance and troubleshooting.
- Environmental Durability: Built to withstand industrial environments, including resistance to temperature extremes, electrical noise, and mechanical vibrations.
- Modular Construction: Facilitates easy installation and maintenance, offering flexibility in system configuration.
- Hot Swappable: Allows seamless replacement of modules without system downtime, maximizing operational efficiency.
Frequently Asked Questions (FAQs)
1. What is the primary function of the Triconex 3301 Digital Input Module?
The Triconex 3301 DI Module is designed to receive and process digital (on/off) signals from field devices such as sensors, switches, and relays within industrial control systems.
2. How many input channels does the 3301 module support?
The module supports 32 commoned digital input channels, allowing for extensive monitoring capabilities.
3. What voltage levels are considered ‘On’ and ‘Off’ for the inputs?
Input voltages between 0–5 V DC are considered ‘Off,’ 6–14 V DC are in the transition region, and 15–30 V DC are considered ‘On.’
4. What is the typical input delay for this module?
The input delay is less than 10 milliseconds for both transitions from On to Off and Off to On.
5. Is the Triconex 3301 module suitable for safety-critical applications?
Yes, it is designed for use in safety instrumented systems (SIS) and includes fault-tolerant features suitable for safety-critical applications.
6. Can the module operate in harsh industrial environments?
Yes, the module is built to withstand industrial environments, including resistance to temperature extremes, electrical noise, and mechanical vibrations.
7. Does the 3301 module support hot-swapping?
Yes, the module is designed to be hot-swappable, allowing for replacement without system downtime.
8. What diagnostic features are included in the module?
The module includes real-time monitoring and analysis tools that enable proactive maintenance and troubleshooting.
9. How is the Triconex 3301 integrated into an existing control system?
The module seamlessly integrates into the Triconex Trident and Tricon safety system architecture. It connects to existing input/output (I/O) configurations and communicates with other modules via secure protocols to ensure system-wide reliability and redundancy.
10.What is the typical response time for input signal changes?
The module has a fast response time, with an input delay of less than 10 milliseconds for transitions from On to Off or Off to On.
Related Models in the Same Series
| Model Number | Description |
|---|---|
| Triconex 3301 | Digital Input Module |
| Triconex 3700A | High-Density Digital Input Module |
| Triconex 3503E | TMR Digital Output Module |
| Triconex 3623T | TMR Analog Input Module |
| Triconex 3805E | High-Speed Counter Module |
| Triconex 3008 | Main Processor Module |
| Triconex 8110 | I/O Communication Module |
| Triconex 9853-610 | Redundant Communication Module |
| Triconex 4351B | Enhanced Analog Output Module |
| Triconex 8312 | TMR Expander Interface Module |
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|---|---|
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