Triconex AO3481 TMR Analog Output Module
Triconex AO3481 is a hot-swappable triple modular redundant analog output module for Tricon SIS safety instrumented systems under Schneider Electric. It outputs precision 4-20mA analog control signals to regulate modulating valves and field actuators in safety-critical industrial processes.
This SIL3 certified module adopts TMR 2oo3 voting architecture with 12-bit resolution and built-in channel diagnostics. It is discontinued legacy spare parts, widely used for maintenance replacement of ESD and fire & gas safety control systems.
Main Specifications
| Item | Parameter |
| [1] Brand | Triconex (Schneider Electric) |
| [2] Model | AO3481 |
| [3] Product Type | TMR Analog Output Module |
| [4] Signal Type | 4-20mA analog current output |
| [5] Resolution | 12-bit |
| [6] Safety Grade | IEC 61508 SIL 3, Hot swappable |
Core Functions
| Function | Description |
| [1] Precision Analog Output | Output 4-20mA control signals to regulate control valves and field modulating actuators. |
| [2] TMR 2oo3 Fault Voting | Triple redundant circuit, single channel fault will not affect safety output operation. |
| [3] Real-time Channel Diagnostics | Detect loop open/short circuit, load fault and module internal hardware failure. |
| [4] Hot Swap Maintenance | Module replacement without shutting down the entire SIS safety rack during maintenance. |
Application Scenarios
| Industry | Usage |
| [1] Oil & Gas | Offshore platform ESD and pipeline pressure regulating valve safety control. |
| [2] Chemical Industry | Reactor temperature and flow modulation control for hazardous process units. |
| [3] Power Generation | Turbine governing valve and boiler safety modulating control systems. |
| [4] Legacy System Maintenance | Spare analog output module replacement for aging Tricon SIS racks. |
FAQ
| Question | Answer |
| [1] What is Triconex AO3481? | It is SIL3 TMR analog output module for Tricon safety instrumented SIS system. |
| [2] What signal does it output? | 4-20mA analog current signal to drive control valves and field actuators. |
| [3] Can it support hot swap? | Yes, hot swap supported without safety rack shutdown during replacement. |
| [4] Is Triconex AO3481 discontinued? | Yes, it is legacy spare for maintenance replacement of existing Tricon safety racks. |
