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Description:ICS Triplex T3481A is a High-Density Guarded Output Module for secure signal control.
Product condition: New
Packing condition:Factory Packing
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Manufacturer | ICS triplex |
Item number | T3481A |
Country of Origin | United States |
Lead Time | In stock |
After-Sales Support | 12-months |
HS Code / Commodity code | 8537101190 |
Quotes are valid for 30 days from the day the quote is received unless stated otherwise at the time of quotation.
Yes,we offer one year warranty for all new products.
Yes. We worked with FEDEX/DHL/TNT/UPS/ allowing us to provide swift global delivery of parts to any corner of the world.
Normally 3-5 working days,some remote areas 5-7 days more.
T3481A is not a minor rev of the T3481; it is a performance variant built for “fast-loop” duties: 250 µs channel refresh, differential voltage read-back terminals and zero-drift calibration without stopping the process. Target applications are gas-turbine inter-stage cooling valves, ethylene-cracking-furnace draft dampers and millisecond-trip differential-pressure valves—any control loop that needs command and feedback inside the same Tricon scan.
1.What makes it different
• 250 µs / 16 ch parallel update – four times faster than the standard T3481, fits directly into a 2 ms Tricon task.
• Every channel provides a differential 0–5 V read-back pin for positioner or transmitter feedback, saving one whole input board slot.
• On-line “auto-zero wipe”: Hall sensors disconnect the loop for 100 µs every 30 min, re-calibrate offset and gain, SIL 3 validity maintained.
• Field-side rating raised to 80 V dc, tolerates 48 V dc buses plus 100 % surge overhead.
2.Key data
Item |
Value |
Function |
16 isolated current sinks + diff. voltage read-back |
Sink range |
0–22 mA (default 4–20 mA) |
Load capability |
0–1 kΩ @ 20 mA / 80 V |
Refresh & settle |
250 µs update all ch, <50 µs settling |
Read-back accuracy |
±0.05 % for 0–5 V |
Current accuracy |
±0.04 % FSR |
Temp. drift |
25 ppm/°C |
Isolation |
1 kV rms ch-to-bus, ch-to-ch |
On-line cal. |
Zero/gain, 30 min cycle, bumpless |
Diag. pulse |
0.3 mA, 80 µs, HART-0 transparent |
Field bus |
12–80 V dc |
Energy absorption |
2 J (inductive) |
Rack power |
5 V 1.2 A, 3.3 V 0.4 A |
MTBF (Telcordia) |
1.22 million h |
Temperature |
–40 … +75 °C |
Termination |
Push-in, 2.5 mm², pluggable |
3.Typical “fast-loop” wiring
① Gas-turbine cooling valve: Tricon DO → T3481A CHx current sink → servo-valve coil; valve potentiometer 0–5 V wired to the same board “read-back” terminal → Tricon AI—command and feedback in one cable.
② Millisecond relief valve: T3481A outputs 8 mA (safe position) → cryo-solenoid; when SPEED task triggers, the board slews to 20 mA within 250 µs, valve fully open, one full scan faster than legacy schemes.
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