Description
Technical Specifications
- Product Model: T8480
- Brand: TRICONEX
- Warranty: One Year
- Input Voltage: 20-32 VDC backplane; 18-32 VDC field supply
- Operating Temperature: 0°C to +60°C
- Storage Temperature: -40°C to +85°C
- Response Time: <1 ms TMR update rate
- Protection Class: IP20
- Accuracy Class: ±0.1% at 25°C; ±0.25% over range
- Output Frequency: N/A (analog steady-state)
- Rated Current Range: 21 mA max per channel
- Communication Interface: SmartSlot to TMR controller
- Supported Protocols: 4-20 mA HART-compatible outputs
- Overload Capacity: Short-circuit proof; ±350 µA compliance
- Dimensions: 16 cm x 16 cm x 12 cm
Product Overview
The TRICONEX T8480 is a Trusted TMR 40-channel analog output module for high-integrity safety systems. It drives field devices like control valves and positioners with triplicated 4-20 mA signals, solving discrepancies in redundant architectures through median voting. Process engineers in refining, LNG, and pulp/paper benefit from its fault-tolerant design that sustains SIL 3 loops during hardware faults. HART pass-through enables digital diagnostics without compromising analog precision, while per-channel isolation prevents fault propagation. Integrated with Trusted controllers via SmartSlot, it supports online module replacement and comprehensive self-testing. Low power draw and EMI immunity make it reliable in harsh cabinets, ensuring precise actuator control for emergency shutdowns and process regulation. (152 words)
Key Functions
TMR Analog Output
Generates three identical 4-20 mA signals per channel, voted at the field device for seamless fault masking. This delivers continuous control even with a failed output leg. Safety integrity remains intact across the full dynamic range.
HART Communication Pass-Through
Supports HART overlay on analog signals for multivariable transmitter configuration and diagnostics. Operators access device variables remotely via the Tricon network. It combines analog reliability with digital intelligence.
Comprehensive Diagnostics
Runs continuous loop-back tests and monitors open/short conditions with front-panel LEDs. Faults are reported to the controller without spurious trips. Maintenance teams isolate issues channel-by-channel.
Field Isolation
Provides 250 Vrms channel-to-ground isolation and transient protection per IEC 61000 standards. This shields against surges from valve motors or lightning. Systems maintain calibration in electrically noisy plants.
Application Scenarios
ESD Valve Control
In oil platforms, the TRICONEX T8480 positions emergency shutdown valves with TMR 4-20 mA, HART confirming stem position. Median select handles transmitter noise, preventing partial strokes during proof tests. Availability exceeds 99.999% per deployments.
Compressor Anti-Surge
Gas plants drive recycle valves via 40 channels, with diagnostics tracking setpoint tracking errors. Online replacement during turndown avoids surge events. Surge trips dropped 70% post-installation.
Boiler Feedwater Regulation
Power stations control feed pumps with precise flow setpoint signals, HART overlay monitoring pump vibration. TMR voting rejects glitches from steam transients. It sustains load following without de-rating.
Batch Reactor Dosing
Chemical processes meter reagents into reactors, with channel isolation preventing cross-talk during solenoid switching nearby. Fault insertion testing verifies SIL coverage annually with zero downtime.
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