Description
Product Applications
The TRICONEX 3805E is a high-performance analog output module designed for Tricon Safety Instrumented Systems (SIS). It provides the critical interface for driving final control elements in safety-critical loops. Typical applications include:
- Emergency Shutdown Systems (ESD): Modulating control valves and shutdown valves.
- Critical Process Control: Driving variable frequency drives (VFDs), servo valves, and motor controllers for precise process regulation.
- Turbine & Compressor Control: Managing steam valves, anti-surge valves, and other critical actuators in rotating equipment.
- Fire & Gas (F&G) Systems: Controlling analog suppression systems or ventilation dampers.
TRICONEX 3805E
Specifications & Key Features
The 3805E is engineered with Triple Modular Redundancy (TMR) architecture to ensure no single point of failure in the output path.
| Feature | Specification |
|---|---|
| Product Type | Analog Output Module (TMR) |
| Output Channels | 8 Channels (DC Coupled, Common Return) |
| Output Signal | 4–20 mA (+6% Overrange) |
| Resolution | 12-bit |
| Accuracy | < 0.25% FSR (Full Scale Range) |
| Update Rate | 10 ms (All channels synchronized) |
| Load Capability | Max 750 Ω @ 20 mA |
| Safety Integrity | SIL 3 Capable (IEC 61508) |
| Part Number Reference | 9853-8XX (Base P/N for 3805E variants) |
| Termination Board | Compatible with FI-PFH-TR-AO-380X (HART) |
Key Characteristics:
- TMR Architecture: Features three independent output circuits. The module uses mid-value selection voting logic to determine the correct output, ensuring a single channel failure does not affect the process.
- Online Maintenance: Supports hot-swapping, allowing for module replacement without interrupting the safety system or process.
- Advanced Diagnostics: Provides continuous channel-level diagnostics, including open/short circuit detection and field power monitoring, reported via TriStation software.
- EFTA Variant: The “EFTA” suffix typically denotes a specific manufacturing site, firmware revision, or enhanced field-testable feature set. It is functionally compatible with standard 3805E modules but should be matched with existing chassis firmware for optimal performance.
TRICONEX 3805E
Related Series Models
If you are evaluating alternatives or cross-references within the Triconex Analog Output family:
- 3806E: 8-Channel, 16–320 mA Output. Designed for driving high-current loads like solenoid valve arrays or large actuators.
- 3807E: 16-Channel, 4–20 mA Output. A high-density alternative to the 3805E, saving rack space in applications requiring many analog outputs.
- 3805H: A high-performance variant of the 3805E, often featuring enhanced processing or specific regional certifications.
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