Triconex 3805E Analog Output Module – 8-Channel 4–20mA Field Output | Tricon TMR Safety Platform
The Triconex 3805E is an 8-channel analog output module engineered for the Tricon Triple Modular Redundant (TMR) Safety Instrumented System. Designed to IEC 61511 / IEC 61508 SIL 3 requirements, it delivers continuous, fault-tolerant 4–20 mA current loop signals to final control elements in high-hazard process environments. Each channel operates independently with hardware-enforced voting logic, ensuring that a single-point failure never propagates to the field output.
At Konmask.com, we source the 3805E exclusively from decommissioned OEM installations and certified surplus channels. Every unit undergoes incoming inspection, functional verification, and firmware-revision logging before listing — giving procurement engineers the confidence of a traceable, specification-compliant component.
Complete Technical Specifications
- Part Number: 3805E
- Manufacturer: Triconex (Schneider Electric)
- Platform: Tricon TMR Safety System (v9 / v10 chassis)
- Module Type: Analog Output (AO)
- Channel Count: 8 channels, individually isolated
- Output Signal: 4–20 mA current loop (sourcing)
- Resolution: 12-bit DAC per channel
- Accuracy: ±0.1% of full scale @ 25 °C
- Load Impedance: 0–750 Ω per channel
- Isolation: Channel-to-channel and channel-to-backplane optical isolation
- Safety Integrity Level: SIL 3 capable (IEC 61508 / IEC 61511)
- Redundancy Architecture: Triple Modular Redundant (TMR) with 2-of-3 voting
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +85 °C
- Relative Humidity: 5–95% non-condensing
- Power Consumption: ≤ 8 W (typical, fully loaded)
- Module Weight: 2,140 g (with backplane connector)
- Backplane Interface: Tricon proprietary high-speed serial bus
- Diagnostics: Continuous self-test; fault annunciation via Tricon Main Processor
- Certifications: FM, CSA, ATEX Zone 2 (via system-level approval), CE
- HS Code: 8537.10
Proven Application Environments
- Oil & Gas: Emergency Shutdown (ESD) and High-Integrity Pressure Protection Systems (HIPPS) — driving control valves and positioners
- Petrochemical & Refining: Burner Management Systems (BMS) requiring SIL 3 analog output integrity
- LNG & Pipeline: Compressor anti-surge control loops with continuous 4–20 mA demand signals
- Power Generation: Turbine governor and steam-valve positioning in combined-cycle plants
- Chemical Processing: Reactor feed-rate control where output failure must be detected and annunciated within the PFD budget
- Offshore Platforms: Fire & Gas (F&G) suppression actuation requiring certified TMR output modules
Engineering Advantages
- True TMR Output Path: Three independent DAC circuits vote before driving the field terminal — no single component failure can produce an undetected spurious output.
- Hot-Swap Capable: Module can be replaced under power without process interruption when installed in a Tricon chassis with redundant power.
- Continuous Diagnostics: Built-in HART pass-through (firmware-dependent) allows valve diagnostics without additional hardware.
- Deterministic Scan Time: Output update latency < 50 ms at standard Tricon scan rates, suitable for fast-loop control.
- Long Service Life: Conformal-coated PCB rated for 20-year design life in IEC 60068-compliant environments.
System Architecture & Signal Flow
Within the Tricon chassis, the 3805E occupies a standard I/O slot and communicates with all three Main Processors (MPs) simultaneously via the TMR backplane bus. Each MP independently computes the demanded output value; the 3805E’s on-board voter selects the 2-of-3 consensus value and drives the corresponding DAC. The resulting 4–20 mA signal is routed through the field termination assembly (FTA) to the final control element. Any discrepancy between the three MP demands triggers a diagnostic alarm without interrupting the output — maintaining process continuity while alerting the control room.
Sourcing & Quality Verification
- Origin: Decommissioned OEM installations and certified surplus distributors — no grey-market or counterfeit sources.
- Incoming Inspection: Visual inspection (IPC-A-610 Class 2 criteria), power-on functional test, and channel-by-channel output verification at 4 mA, 12 mA, and 20 mA setpoints.
- Firmware Logging: Revision level recorded and disclosed in the shipment documentation.
- Packaging: ESD-safe anti-static bag + foam-lined carton; humidity indicator card included.
- Warranty: 12-month Konmask operational warranty against manufacturing defects.
Procurement Process
- Submit your RFQ via [email protected] or the on-site chat — include your required firmware revision and delivery timeline.
- Receive a formal quotation with stock confirmation within 1 business day.
- Issue PO; payment via T/T, PayPal, or credit card (Visa / Mastercard).
- Module ships within 2–3 business days via DHL Express or FedEx International Priority with full tracking.
- Shipment documentation includes: commercial invoice, packing list, test report, and firmware revision record.
Technical FAQ
- Q: Is the 3805E compatible with Tricon v9 and v10 chassis?
- A: Yes. The 3805E is backward-compatible with both v9 and v10 Tricon chassis. Confirm your TriStation firmware version supports the module revision shipped.
- Q: Can the 3805E be used in a non-TMR (simplex or duplex) Tricon configuration?
- A: The 3805E is designed exclusively for the TMR architecture. Simplex or duplex configurations require different Triconex module families.
- Q: What is the difference between 3805E and 3805H?
- A: The 3805H is the enhanced revision with extended temperature range and additional HART support. The 3805E is the standard production variant suitable for most SIL 3 applications.
- Q: Do you provide a Certificate of Conformance (CoC)?
- A: Yes. A Konmask CoC is included with every shipment. OEM CoC availability depends on the specific unit’s provenance — please enquire at RFQ stage.
- Q: What is the lead time for bulk orders (>5 units)?
- A: Contact us directly. We maintain relationships with multiple surplus channels and can typically consolidate bulk quantities within 5–10 business days.
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