The TRICONEX 3805H is a Triple Modular Redundant (TMR) analog output module used in Triconex safety instrumented and industrial control systems to provide high-integrity, precise analog control signals to field devices.
Key FeaturesTRICONEX 3401｜Digital Output Module｜

Architecture: Triple Modular Redundancy (TMR) for fault-tolerant operation — three independent processing paths with majority voting logic to detect and mask faults.

Channels: 8 analog output points.

Output Type: Current loop outputs, typically 4–20 mA with a small over-range capability (up to ~21.2 mA).

Resolution: 12-bit digital-to-analog conversion for fine control.

Accuracy: Typically better than ± 0.25% full scale within the 4–20 mA range.

Loop Power: Requires external loop power (nominal +24 VDC, up to +42.5 VDC for reverse-voltage protection).

Diagnostics: Built-in diagnostics for loop-power status and channel health; fault indicators available.

Hot-Swappable: Can be replaced without shutting down the system (typical for Triconex modules).

Typical Use Cases

This module is used wherever deterministic analog control with safety-certified operation is required, including:

Safety Instrumented Systems (SIS) for emergency shutdown and process protection.

Control valves and actuators in oil & gas, petrochemical, power generation, and chemical plants.

Automated process feedback loops requiring accurate and robust analog outputs.

Typical Specifications
Feature Typical Value
Module Type Analog Output (AO)
Channels 8
Output Range 4–20 mA (+6% over-range)
Resolution 12-bit
Accuracy < 0.25% FSR
Loop Power +24 VDC nominal (up to +42.5 VDC)
Fault Handling TMR architecture
Environment Industrial operating range

TRICONEX 3805H｜Analog Output Module｜