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Product Introduction
The Triconex 3805E/H Analog Output Module is a high-performance, safety-rated component of the Triconex safety and critical control system architecture, manufactured by Schneider Electric. Designed to meet the rigorous requirements of Safety Integrity Level 3 (SIL 3) as per IEC 61508 standards, this module delivers precise and reliable analog output signals for control of actuators, valves, or other final elements in critical industrial applications.
The 3805E/H is particularly suited for use in safety instrumented systems (SIS) where dependable analog output is essential. It features redundant and fault-tolerant circuitry, ensuring that system operations continue even in the presence of hardware faults. Each module is capable of converting digital values from the Tricon controller into industry-standard analog output signals such as 4–20 mA, ensuring compatibility with a wide range of field devices.
This module not only supports safety-critical environments but also offers built-in diagnostics and hot-replace capabilities, making it ideal for demanding process industries such as oil and gas, chemical processing, power generation, and manufacturing automation.
Product Specifications
| Parameter | Specification |
|---|---|
| Model | Triconex 3805E/H |
| Manufacturer | Schneider Electric (Triconex) |
| Module Type | Analog Output Module (Current Output) |
| Safety Standard Compliance | SIL 3 – IEC 61508, IEC 61511 |
| Number of Channels | 8 Analog Output Channels |
| Output Signal Range | 4–20 mA |
| Load Resistance Range | 0 – 750 ohms |
| Resolution | 12-bit DAC resolution |
| Accuracy | ±0.05% of Full Scale at 25°C |
| Isolation | 2500 V channel-to-channel and channel-to-backplane isolation |
| Diagnostics | Loop monitoring, open/short circuit detection |
| Hot-Swap Capability | Yes |
| Operating Voltage | 24 VDC nominal |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Mounting | Rack-mounted in Tricon main chassis |
| Dimensions (H x W x D) | 490 x 490 x 68 mm |
| Weight | 2.27 kg |
| Communication Interface | Backplane communication with Tricon controller |
Product Applications
The Triconex 3805E/H is designed for a wide array of safety-critical and high-reliability industrial applications where analog signal control is required:
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Oil & Gas: Regulating control valves in ESD (Emergency Shutdown Systems), BPCS, and pressure control systems.
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Power Generation: Controlling turbine governors, feedwater control valves, and boiler systems.
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Petrochemical Plants: Accurate dosing control, temperature regulation, and flow management.
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Water & Wastewater Treatment: Monitoring and controlling actuators in pH adjustment, chlorination, and filtration.
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Pharmaceutical Manufacturing: Ensuring precision in batch process control involving temperature and fluid dosing.
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Chemical Industry: Delivering analog output to safety-rated actuators and continuous process loops.
The module ensures that analog signals required to control physical processes remain stable and accurate even under fault conditions.
Product Advantages
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SIL 3 Certified Reliability: Provides robust and secure performance in safety-instrumented systems.
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8-Channel Density: Allows compact installation with high I/O density per slot.
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Precision Analog Output: Delivers 4–20 mA signals with high accuracy and low drift.
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Comprehensive Diagnostics: Continuous loop health checking to detect short, open, or deviation.
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Redundancy Support: Seamlessly integrates into Triconex’s triple modular redundancy (TMR) architecture.
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Hot-Swappable: Modules can be replaced without shutting down the system, minimizing process disruption.
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Wide Environmental Range: Operates in harsh and demanding industrial environments.
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Flexible Configuration: Supports dynamic mapping and diagnostics through the Triconex controller.
Frequently Asked Questions (FAQ)
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What output range does the Triconex 3805E/H support?
The module supports standard 4–20 mA analog output signals. -
How many output channels are available?
The 3805E/H provides 8 independent analog output channels. -
Is the 3805E/H hot-swappable?
Yes, the module can be replaced while the system is powered on and running. -
Is it suitable for use in SIL 3 environments?
Yes, it meets SIL 3 certification under IEC 61508 and IEC 61511 standards. -
What level of diagnostic capability does it offer?
It features advanced diagnostics, including loop monitoring, and detects open or short circuits. -
Can the module drive high-impedance loads?
Yes, the output can handle loads up to 750 ohms. -
Is there isolation between channels?
Yes, each channel is electrically isolated from others and from the backplane. -
What is the physical size of the 3805E/H module?
It measures 490 x 490 x 68 mm. -
How accurate is the analog output signal?
Accuracy is rated at ±0.05% of full scale at 25°C. -
Where is the module typically mounted?
It is installed in the main Triconex chassis and communicates via the system backplane.
Recommended Related or Same-Series Models
| Model | Description | Type | Key Feature |
|---|---|---|---|
| 3700A | Base I/O Chassis | Chassis | Houses all Tricon modules |
| 3703E | Analog Input Module | Input Module | 8-channel current/voltage input |
| 3708E | Thermocouple Input Module | Input Module | Multi-type thermocouple support |
| 3720E | Relay Output Module | Output Module | High-integrity relay switching |
| 3721 | Digital Output Module | Output Module | 16-channel discrete output |
| 3806E | Analog Output Module | Output Module | Higher density analog output |
Popular Models from the Same Brand (Triconex)
| Model | Description | Type | Key Feature |
|---|---|---|---|
| 3008 | Triconex Main Processor | CPU Module | Core triple-redundant controller |
| 3625 | Communication Module | Network Interface | Ethernet, Modbus support |
| 3503E | Power Supply Module | Power Supply | Redundant power input |
| 3706A | Voltage Input Module | Analog Input | 8-channel voltage input |
| 3725 | Analog Output Module | Output Module | Current and voltage output support |
| 4200 | Safety View Workstation | Engineering HMI | Safety-certified operator console |
