Description
Triconex 3721
Reliable SIL 3 certified digital output module for safety instrumented systems in critical process applications
| Brand | Triconex |
| Model | 3721 |
| Voltage | 24V DC |
| Country of Origin | USA |
| Weight | 1.8 kg |
| Dimensions | 266 x 152 x 51 mm |
| Warranty | 12 months |
| Certifications | CE, UL, ATEX, IEC 61508 SIL 3 |
| SKU / MPN | 7401-3721 |
| What’s in the box | Triconex 3721 Digital Output Module, installation manual, calibration certificate |
| Module Type | Digital Output Module |
| Number of Outputs | 16 channels |
| Output Voltage | 24V DC |
| Safety Integrity Level | SIL 3 |
| Communication | Tricon Triple Modular Redundant Backplane |
| Mounting | Tricon Chassis |
Key benefits: Triple modular redundant architecture, SIL 3 certified, hot-replaceable, 24V DC outputs, TUV certified, long-term availability for legacy systems
Typical applications: Emergency Shutdown Systems (ESD), Fire and Gas Detection, Burner Management Systems, Turbine Control, Critical Process Safety Interlocks
Lifecycle: Mature active product, widely deployed in safety instrumented systems






Richard S. –
Arrived in perfect condition. Ran diagnostics, all outputs nominal.