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Product Introduction
The Triconex 3708E Thermocouple Analogue Input Module is a key component within the Triconex Safety Instrumented System (SIS), developed by Schneider Electric. This module specializes in acquiring and processing temperature signals from thermocouples, providing accurate and reliable input data to the Triconex control system. Designed to meet stringent safety requirements, the 3708E module ensures continuous, fault-tolerant operation for critical industrial applications where temperature monitoring is vital.
Engineered to support SIL 3 safety integrity levels as per IEC 61508 and IEC 61511 standards, the 3708E integrates seamlessly into the Triconex triple modular redundant architecture, delivering dependable measurement and diagnostics. It supports various thermocouple types, allowing versatile deployment across industries such as oil & gas, petrochemicals, power generation, and chemical manufacturing.
The 3708E is appreciated for its robustness, precision, and ability to provide real-time temperature inputs that are essential for process control and safety shutdown scenarios.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | Triconex 3708E |
| Manufacturer | Schneider Electric (Triconex) |
| Module Type | Thermocouple Analogue Input Module |
| Safety Integrity Level (SIL) | SIL 3 compliant (IEC 61508 / IEC 61511) |
| Input Signal Type | Thermocouple Types B, E, J, K, N, R, S, T |
| Number of Channels | 8 channels |
| Input Range | -270°C to +1820°C (depending on thermocouple type) |
| Accuracy | ±0.1% FS (Full Scale) typical |
| Sample Rate | Cycle time compatible with Triconex Triple Modular Redundancy |
| Isolation | Channel to channel isolation; module to backplane isolation |
| Communication Interface | Triconex proprietary backplane bus |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5% to 95%, non-condensing |
| EMC Standards | IEC 61000-6-2 (Industrial Immunity), IEC 61000-6-4 (Emission) |
| Dimensions (H x W x D) | 273 x 213 x 25 mm |
| Weight | 2.426 kg |
| Mounting | Rack-mounted within Triconex chassis |
Product Applications
The 3708E module is utilized in safety-critical process control environments where precise temperature measurement from thermocouples is required:
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Refinery and Petrochemical Plants: Monitoring furnace, reactor, and pipeline temperatures for safe operation.
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Power Generation: Boiler temperature measurement, turbine temperature monitoring.
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Chemical Processing: Ensuring accurate temperature control to prevent hazardous conditions.
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Oil & Gas: Pipeline and processing unit temperature supervision for emergency shutdown systems.
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Pharmaceutical Manufacturing: Controlled temperature monitoring for critical batch processes.
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Steel and Metal Production: Furnace and kiln temperature measurements for quality and safety assurance.
Its integration into Triconex’s triple modular redundant system allows continued operation despite faults, vital for uninterrupted safety monitoring.
Product Advantages
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High Safety Integrity: Certified to SIL 3, suitable for the most demanding safety instrumented systems.
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Versatile Thermocouple Compatibility: Supports all common thermocouple types for broad application coverage.
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Robust Signal Isolation: Prevents interference and cross-talk ensuring signal integrity.
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Triple Modular Redundancy: Designed for use in Triconex’s fault-tolerant architecture to ensure uninterrupted service.
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High Accuracy and Fast Response: Enables precise and timely temperature monitoring critical for safety.
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Advanced Diagnostics: Continuous self-checking and fault detection help prevent false alarms and maintain reliability.
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Wide Operating Conditions: Suitable for harsh industrial environments due to rugged design.
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Ease of Integration: Fits directly into Triconex racks with no need for additional adapters or converters.
Frequently Asked Questions (FAQ)
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What thermocouple types does the Triconex 3708E support?
It supports all standard types: B, E, J, K, N, R, S, and T thermocouples. -
Is the 3708E module SIL certified?
Yes, it is certified to SIL 3 according to IEC 61508 and IEC 61511 standards. -
How many input channels are available on the 3708E?
The module provides 8 isolated thermocouple input channels. -
Can this module be used in a redundant safety system?
Yes, it is designed to work within the Triconex triple modular redundant safety architecture. -
What is the accuracy of the temperature measurement?
Typical accuracy is ±0.1% of full scale, depending on thermocouple type and range. -
What are the environmental operating limits for the 3708E?
It operates reliably from -20°C to +70°C and supports relative humidity from 5% to 95%, non-condensing. -
What is the physical size of the module?
Dimensions are 273 x 213 x 25 mm. -
How is the module mounted within the control system?
It is rack-mounted inside the Triconex chassis. -
Does the module provide diagnostics for input faults?
Yes, it continuously monitors for faults including open circuit and sensor failures. -
Can the 3708E be integrated with other Schneider Electric products?
It integrates seamlessly with the Triconex safety system and can communicate with other Schneider Electric process control components.
Related or Same-Series Models
| Model | Description | Application | Key Feature |
|---|---|---|---|
| 3705E | RTD Analogue Input Module | Temperature measurement | Supports RTD sensors, SIL 3 |
| 3706E | Voltage Analogue Input Module | Voltage signals input | 8-channel voltage input, SIL 3 |
| 3710E | Current Analogue Input Module | Current input signals | 8-channel 4-20mA input, SIL 3 |
| 3707E | Digital Input Module | Discrete signal input | 16-channel, SIL 3 certified |
| 3720E | Relay Output Module | Safety relay output | 8-channel relay outputs, SIL 3 |
| 3740E | Digital Output Module | Solid state output | 8-channel solid state, SIL 3 |
Popular Models from the Same Brand (Triconex)
| Model | Description | Type | Key Feature |
|---|---|---|---|
| 3504 | Triconex CPU Module | Controller | Triple modular redundant CPU |
| 3725 | Analog Output Module | Output Module | 8-channel analog outputs |
| 3604 | Power Supply Module | Power Supply | Redundant power supply |
| 3741 | High-Speed Digital Output Module | Output Module | High-speed, SIL 3 certified |
| 3709E | Universal Input Module | Multi-sensor inputs | Voltage, current, thermocouple |
| 3620 | Communication Interface Module | Network Interface | Modbus, Profibus communication |
