AO3481 (3481) | Tricon System · Analog Output Module (TMR SIL3) Model: AO3481 (abbreviated as 3481) Brand: Triconex (Schneider Electric) System: Tricon v10/v11 Safety System (Non-Trident) Type: 8-channel Analog Output (AO), TMR Triple Modular Redundancy, SIL3 ## I. Core Specifications (Official Standard) ### 1. Channels & Signals Number of Channels: 8 independent analog output channels Output Type (Software Selectable): Current: 4–20mA (Commonly Used) Voltage: 0–10VDC Resolution: 16-bit Accuracy: ±0.1% FS (Full Scale) Load Capacity: Current: ≤600Ω Voltage: ≥1kΩ ### 2. Performance & Response Update Rate: ≤10ms Isolation: Channel-to-channel isolation, Channel-to-backplane isolation, Withstand Voltage: 1500VDC Over-range Protection: 0–22mA (Current Mode) ### 3. Environmental & Mechanical Parameters Operating Temperature: -40℃ ~ +70℃ Power Consumption: ≤5W (24VDC Power Supply) Dimension / Weight: Standard Tricon module; Approximately 1.2kg Hot Swap: Supported, online replacement without system impact ### 4. Safety & Architecture Architecture: TMR Triple Modular Redundancy (2-out-of-3 Voting) Safety Level: SIL3 (IEC61508, TÜV Certified) Self-diagnosis: Alarm for open circuit, short circuit and abnormal signal of all channels ## II. Typical Applications Valve Control: Pneumatic / Electric Regulating Valves (4–20mA) Variable Frequency Speed Regulation: Speed control of fans and water pumps (0–10V) SIS/ESD: Safety actuator drive and emergency shutdown valve control Industries: Petrochemical, Power, Oil & Gas, LNG ## III. Differences from Similar Modules AO3481 (3481): Tricon system, 8-channel AO, 4–20mA/0–10V, TMR SIL3 PI3381: Trident system, 16-channel pulse input, requires 2381 baseplate 3381 (AI): Tricon system, 32-channel AI, 4–20mA ## IV. Matching & Account Information Compatible Backplane: 4000 Series Backplane (Tricon Chassis) Common Modules in the Same Series: AI3351, DI3301, DO3311, PI3381