Overview
The Invensys Triconex 3481 S2, also cataloged as the 3481 S2 Analog Output Module, operates as a dedicated hardware component for converting Tricon controller commands into isolated 4-20 mA field output signals within the Tricon Safety Instrumented System.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3481 S2 |
| Brand | Invensys Triconex |
| Product Type | Analog Output Module |
| System Compatibility | Tricon Safety Instrumented System (SIS) |
| Architecture | Triple Modular Redundant (TMR) safety controller platform |
| Origin | USA |
| Operating Temp | 0 deg C to +70 deg C |
| Operating Humidity | 5% to 95% RH, non-condensing |
| Power Consumption | Not specified |
| Output Signal | 4-20 mA standard analog current output |
| Over-range Output | Up to 22 mA |
| Resolution | 12 bits |
| Output Accuracy | Better than 0.25% of full-scale range |
| External Loop Power Supply | 24 VDC nominal, up to 32 VDC maximum |
| Response Time | 1 ms typical, 3 ms maximum for leg failure response |
| Diagnostics | Channel diagnostics and Forced-Switch Diagnostics (FSD) |
| Mounting Method | Tricon chassis slot installation |
| Maintenance Feature | Hot-swappable module replacement support |
| Safety Capability | Supports SIL 3 applications according to IEC 61508 |
TMR Safety Execution and Fault Isolation
The Triconex 3481 S2 uses the Tricon TMR architecture to maintain output availability during internal channel faults. The module processes analog output commands through redundant voting mechanisms and supports fail-safe state execution within safety instrumented applications.
Furthermore, the module incorporates diagnostic functions that monitor output channel conditions, module health status, and fault states. Galvanic isolation between field circuits and system electronics supports signal integrity in industrial control environments.
The 3481 S2 Analog Output Module provides 4-20 mA current regulation for actuators, control valves, and other analog field devices. Its TMR design allows continued operation when a single module leg experiences a detected failure.
Frequently Asked Questions
Q: Does the Triconex 3481 S2 support hot-swapping during system operation?
A: Yes. The module is designed for installation in Tricon chassis slots with hot-swapping capability, allowing replacement without shutting down the complete safety system.
Q: What analog output signal does the 3481 S2 provide?
A: The module provides standard 4-20 mA analog current output with an over-range capability up to 22 mA.
Q: How does the module handle internal channel faults?
A: The module uses TMR architecture with diagnostic monitoring and fault isolation functions to maintain safe output behavior when internal faults occur.
Field Installation Guidelines
Install the 3481 S2 module only in compatible Tricon chassis positions defined by the system configuration. Verify chassis power conditions before insertion or removal.
Use shielded field wiring for analog output connections and terminate cable shields according to the site grounding practice. Separate analog signal cables from high-voltage power conductors to reduce electrical interference.
Confirm that the connected field devices accept the configured 4-20 mA output range and that the external 24 VDC loop supply meets the application requirements. After installation, perform system diagnostics to verify channel status, output accuracy, and fault reporting functions.
Triconex Top Products
| Triconex | Triconex | Triconex |
| 3625 | CM3201 | 4211 |
| 3700A | 7400207-001 | 9662-810 |
| 4329 | 7400209B-030 | 9563-810 |
| 3008 | 7400208C-020 | 9753-110 |
| 4119A | 7400209-030 | 9853-610 |
| 3636T | 8306A | 9761-210 |
| 3805E | 3625C1 | 4351B |
| 4351A | 3481 S2 | 3721 |
| DO3401 | 4210 | 8312 |
| DI3301 | 8111 | 3503E |
| 3664 | 9562 3000520-390 | MP3101 |
Reviews
There are no reviews yet.