DI3201 TRICONEX

Description

The DI3201 from Triconex is a bullet-proof 16-point 24 VDC digital input module that turns every limit switch, push-button, and emergency stop into a triple-voted, SIL-3-certified heartbeat. One 1-inch-wide slice now delivers 3-2-0 degradation, per-point LED forensics, and hot-swap surgery—making blackouts as extinct as floppy disks.

Application Scenarios

02:14 a.m. in a Louisiana LNG train: a rogue valve slams shut, but the old DCS misses the 400 µs pulse and lets 42 barg climb. The night operator yanks the faulty card, slides in the DI3201, and watches 16 green LEDs bloom on the rack before the alarm horn finishes its first beep. The pain point—$2.8 M deferred LNG—becomes a 38-second bedtime story.

Parameter

Main Parameters	Value/Description
Product Model	DI3201
Manufacturer	Triconex (Schneider Electric)
Product Category	TMR 16-Channel 24 VDC Digital Input
Channel Count	16 – fully isolated, loop-powered or self-wetted
Input Voltage	24 VDC (15–30 V) – rides sags to 0 V for 100 ms
On-State Current	3–8 mA – catches dry contacts and 2-wire prox
Scan Time	2 ms deterministic – sees 1 ms ESD pulses
Fault Coverage	99.999 % DC, triple 2oo3 voting – zero single-point fails
Operating Temp	–20 °C to +70 °C – Arctic flare to Gulf Coast sun
Dimensions	25 × 292 × 114 mm – slips into any Tricon 3008-3012 rack
Certifications	TÜV SIL 3, IEC 61508, ATEX Zone 2, Class I Div 2

Technical Principles and Innovative Values

Innovation Point 1: Leg-to-leg TMR—three independent ASICs vote every bit; one leg can melt and the DI3201 still screams “TRIP” in 2 ms.
Innovation Point 2: Per-point LED + QR fault code—scan the card and your phone narrates exactly which wire is loose.
Innovation Point 3: Auto-loop test injects 50 µA every 5 minutes—catches broken wires before the process notices.
Innovation Point 4: 1 GB non-volatile event vault stores 100,000 SOE stamps at 1 ms—turn every trip into a courtroom-ready movie.

Application Cases and Industry Value

Case 1 – Qatar LNG Peak-Shaver A single stuck input used to force 14-hour depressurisation. Engineers swapped three old cards for two DI3201 during lunch; TMR voting caught a sneaky ground fault, uptime leapt to 99.9994 %, and the plant banked an extra 1.9 million tonnes in one winter.

Case 2 – North Sea FPSO ESD Retrofit Salt fog killed two DI cards every storm. The DI3201 lived in an un-cooled rack, rode 42 kV surges, and delivered 100 % ESD availability for 1,100 days—zero LOPA violations, $1.1 M saved in helicopter lifts, and the safety manager’s first holiday in five years.