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- Triconex
- 8321
- Control Module
- USA
- 50 mm × 230 mm × 240 mm
- 1.58kg
- Xiamen, China
- New & In Stock
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📘 Product Overview – Triconex 8321
The Triconex 8321 is a robust and high-reliability I/O module used in Triconex Safety Instrumented Systems (SIS). As part of a Triple Modular Redundancy (TMR) architecture, the 8321 module is designed to provide digital output capabilities, offering fail-safe control over critical field devices. It is commonly used in applications where safe and precise actuation of relays, solenoids, and other discrete outputs is essential.
This module is ideal for safety-critical environments that require compliance with SIL 3 standards and a high level of fault tolerance. Through continuous diagnostic monitoring and voting logic, the 8321 ensures that the system can tolerate faults without loss of control functionality.
🔧 Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 8321 |
| Function | Digital Output Module (TMR-based) |
| Output Type | Discrete / Digital (typically 24 VDC sourcing/sinking) |
| Output Channels | 32 channels (grouped per TMR architecture) |
| Output Voltage | 24 VDC (nominal) |
| Output Current | Up to 0.5 A per channel |
| Response Time | < 5 ms typical |
| Diagnostics | Channel-level monitoring, open/short circuit detection |
| Redundancy Architecture | Triple Modular Redundancy (TMR) |
| Communication | Tricon system backplane |
| Safety Certification | SIL 3 (IEC 61508) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH, non-condensing |
| Mounting Type | Rack-mounted in Tricon chassis |
| LED Indicators | Status, Fault, Channel Activation |
| Dimensions (W×H×D) | 50 mm × 230 mm × 240 mm |
| Weight | 1.58 kg |
🏭 Applications
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Emergency Shutdown Systems (ESD)
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Fire and Gas Systems (F&G)
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High Integrity Pressure Protection Systems (HIPPS)
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Burner Management Systems (BMS)
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Turbine and Compressor Controls
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Refinery and Petrochemical Automation
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Power Plant Safety Controls
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Offshore Platform Safety Systems
✅ Product Advantages
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SIL 3 Certified: Ensures compliance with the highest international safety standards.
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High Channel Density: 32 output channels per module, optimizing space within the chassis.
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Built-in Diagnostics: Constant monitoring of each output channel helps detect wiring faults and device issues early.
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TMR Redundancy: Enhances system reliability with voting logic that eliminates single-point failures.
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Hot Swap Capable: Can be replaced without shutting down the entire system, ensuring continuous operation.
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Status Indicators: LED feedback simplifies diagnostics and maintenance.
🏷️ Product Classification
| Category | Description |
|---|---|
| Brand | Triconex |
| Series | TMR I/O Modules |
| Module Type | Digital Output |
| Architecture | Triple Modular Redundancy |
| Safety Level | SIL 3 |
| Compatible System | Tricon (Modular Safety System) |
🔁 Related Models – Same Series or Related Function
| Model | Description | Dimensions (mm) | Weight (kg) | Key Features |
|---|---|---|---|---|
| 3625 | Analog Input Module | 50 × 230 × 240 | 1.45 | High-resolution analog signal acquisition |
| 3700A | Digital Output Module | 50 × 230 × 240 | 1.50 | Similar function to 8321, legacy model |
| 3503E | Digital Input Module | 50 × 230 × 240 | 1.40 | Collects digital signals from field devices |
| 3564 | Pulse Input Module | 50 × 230 × 240 | 1.48 | For turbine/compressor speed monitoring |
| 8312 | Main Processor Module | 50 × 230 × 240 | 1.62 | Core logic processor for Tricon systems |
🌟 Popular Triconex Models
| Model | Description | Dimensions (mm) | Weight (kg) | Key Features |
|---|---|---|---|---|
| 3008 | Compact Safety Controller | 48 × 228 × 241 | 1.40 | Ideal for small-to-medium safety applications |
| 4351B | Advanced Processor Module | 50 × 230 × 240 | 1.60 | High-speed logic execution |
| 3703E | Digital Input Module | 50 × 230 × 240 | 1.42 | 32 input channels with diagnostics |
| 9853-610 | I/O Terminal Assembly | 100 × 150 × 50 | 0.90 | Interfaces field wiring to Tricon modules |
| 8312 | High-Performance Processor | 50 × 230 × 240 | 1.62 | Used in complex SIL 3 logic applications |
❓ FAQ – Triconex 8321
Q1: What type of output does the Triconex 8321 provide?
A1: It provides digital or discrete output signals, typically 24 VDC, used to control field devices such as solenoids or relays.
Q2: How many channels are available on the 8321?
A2: The module offers 32 output channels, organized in a TMR structure for high reliability.
Q3: Can the 8321 be used in SIL 3 safety applications?
A3: Yes, it is SIL 3 certified and fully compliant with IEC 61508 standards.
Q4: Is the module hot-swappable?
A4: Yes, the 8321 can be replaced while the system is online, without interrupting operations.
Q5: What industries typically use the 8321?
A5: It is commonly used in oil & gas, petrochemical, power generation, and other process industries.
Q6: What is the typical response time of the outputs?
A6: The module typically responds within 5 milliseconds.
Q7: Does the module support diagnostics?
A7: Yes, it features real-time diagnostics to detect open/short circuits and other failures.
Q8: Can I use it with older Tricon systems?
A8: Compatibility depends on the system revision, but it is generally backward-compatible within the TMR platform.
Q9: How is it installed?
A9: The module is installed in a designated slot within the Tricon chassis and interfaces via the system backplane.
Q10: What are the size and weight of the module?
A10: The module measures 50 mm × 230 mm × 240 mm and weighs approximately 1.58 kg.
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All product specifications are original and authentic imported products. We have an annual sales volume of 300 million yuan, and we only produce original and authentic products. All customers who cooperate with us directly online can enjoy low discounts.
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We have a complete range of product models, 80% of conventional models are in stock, and we have established channels in Asia, Africa, North America, South America, and Europe, effectively shortening the order processing time and satisfying customers in a timely manner.
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Fast delivery. Spot goods can be shipped on the same day, and the delivery time transaction is 20% faster than that of peers on average, with a delivery time accuracy rate of 99%.
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24-hour after-sales service guarantee team, professional and standardized management service system.