Product Short Description
Product Name: TMR (Triple Modular Redundant) Analog Output Module.
Product Overview: The AO2481 is a high-performance analog output module designed for the Tricon v10/v11/v12 safety controller (3700 series I/O). It is a core component for Safety Instrumented Systems (SIS) and critical process control, driving field devices such as valves, actuators, and positioners with exceptional reliability.
Description
Technical Specifications:
-
Manufacturer: Triconex (a Schneider Electric company)
-
Output Channels: 16 fully independent channels, each with triple modular redundancy
-
Output Signal: 4–20 mA (default), configurable via jumper to 0–20 mA or 0–24 mA
-
Load Driving Capability: ≥750 Ω @ 24 VDC
-
Resolution: 16-bit
-
Accuracy: ±0.1% of span (typical, 25 °C)
-
Update Cycle: ≤10 ms (all channels)
-
Isolation: >500 V RMS between channels and between channel and backplane
-
Operating Temperature: 0 °C to +60 °C
-
Safety Certifications: IEC 61508 SIL 3 (under TMR architecture), IEC 61511 compliant, ATEX and IECEx for hazardous areas
Key Features:
-
Native TMR integration: each AO channel is generated by three independent circuits and voted in hardware, not software redundancy
-
Detects three-channel inconsistency and forces output to zero within 20 ms during D/A drift events
-
High load driving: 750 Ω capability directly drives intelligent valve positioners (e.g., Fisher FIELDVUE) without additional signal amplifiers
-
Full-channel diagnostics: real-time monitoring of output current, channel consistency, and hardware health
-
Channel-level open-circuit/short-circuit detection and D/A self-test (power-on + periodic)
-
Hot-swappable installation into Tricon 3700 I/O backplane
-
Seamless integration with Triconex TriStation 1131
Application Scenarios:
-
Building “safety regulation loops” — e.g., precisely regulating cooling water flow to maintain reaction temperature
-
Safety-instrumented systems (SIS) in industries such as oil & gas, power generation, and chemical processing
-
Critical process control requiring closed-loop analog control
Installation & Usage Notes:
-
Installs by inserting into the Tricon 3700 I/O backplane; supports hot-swappable replacement
-
Must reside within a Tricon chassis that supports TMR processors to function according to its safety specifications
-
Routine system maintenance often includes “loop checking” to verify signal precision
-
If a field wiring fault (open loop) occurs, the module triggers a diagnostic alarm and reports the specific faulty channel via LED or system software
Reviews
There are no reviews yet.