Product Parameters
- Model Number: SDO 3411 (Supervised Digital Output)
- System Series: Triconex Tricon / Trident
- Voltage Rating: 24V DC
- Output Points: 16-point isolated outputs
- Architecture: TMR (Triple Modular Redundancy)
- Self-Test Interval: Continuous internal hardware testing
- Current Rating: 0.5A per point (Total module capacity varies by thermal constraints)
- Safety Integrity Level: SIL 3 (IEC 61508)
Product Description
The TRICONEX SDO 3411 is a high-integrity Supervised Digital Output module designed for the Tricon Triple Modular Redundancy (TMR) system. It provides fault-tolerant control for critical safety functions by utilizing three isolated, parallel control paths. The “Supervised” designation indicates that the module continuously monitors the field wiring and the health of the load, detecting open or short circuits even when the output is in the “off” state. This ensures that the safety system is always ready to actuate during a demand event.
Application Fields
This module is a cornerstone of Safety Instrumented Systems (SIS) in high-risk industries such as offshore oil and gas platforms, chemical refineries, and nuclear power plants. It is primarily used for Emergency Shutdown (ESD) systems, Fire and Gas (F&G) detection, and Burner Management Systems (BMS). Its ability to maintain operation despite a single hardware failure makes it essential for processes where unplanned downtime or safety failures carry catastrophic consequences.
Product Specifications
- Weight: 2.10 kg
- Dimensions: 483 mm x 30 mm x 225 mm (Standard Tricon module sizing)
- Origin: USA
Operational Precautions
- Ensure the module is fully seated and the locking levers are engaged to maintain the integrity of the TMR backplane connection.
- Configure the supervision parameters (leakage current thresholds) correctly within the TriStation software to avoid false diagnostic alarms.
- Verify that the total current draw of all 16 channels does not exceed the maximum thermal rating of the chassis slot.
- Only replace modules with identical part numbers and revision levels to maintain the certified safety SIL rating of the system loop.
Recommended Similar Product Models
| Model Number | Series | Primary Function | Voltage/Type |
|---|---|---|---|
| SDO 3401 | Tricon | Standard Digital Output | 24V DC / Non-Supervised |
| SDO 3421 | Tricon | High Current Digital Output | 24V DC / Supervised |
| SDI 3301 | Tricon | Digital Input Module | 24V DC |
| SAI 3351 | Tricon | Analog Input Module | 4-20mA / TMR |
| TCM 4351B | Tricon | Communication Module | Ethernet/Modbus |
