DI3301S2 TRICONEX

Description

The DI3301S2 from Triconex (Schneider Electric) is the Series-2 evolution of the legendary 32-channel 24 VDC TMR digital input module—now with enhanced ESD immunity, faster fault isolation, and a built-in QR diagnostic beacon that turns every midnight alarm into a 30-second selfie fix. One hot-swappable slice still guards 32 safety loops with triple 2oo3 voting, but the S2 upgrade quietly adds 40 % better surge survival and zero-downtime firmware flashes.

Application Scenarios

03:11 a.m. in a Qatar LNG regas terminal: a rogue lightning spike fries a competitor’s DI card, forcing a 12-hour ESD shutdown. The night tech yanks the old slice, snaps in the DI3301S2, and watches 32 green LEDs bloom across three legs before the SCADA alarm clears. The pain point—$3.2 M in deferred LNG—becomes a 41-second hero selfie posted to the plant WhatsApp group.

Parameter

Main Parameters	Value/Description
Product Model	DI3301S2
Manufacturer	Triconex – Schneider Electric
Product Category	TMR 32-Channel 24 VDC Digital Input (Series-2)
Channel Count	32 – loop-powered or self-wetted dry contacts
Input Voltage	15–30 VDC – rides ±40 % brown-outs
On-State Current	3–8 mA – catches 2-wire prox & push-buttons
Scan Time	1.5 ms deterministic – sees 700 µs ESD pulses
Fault Coverage	>99.999 % DC, leg-to-leg TMR voting
Isolation	2500 VDC field-to-logic – lightning shrugs
Operating Temp	–40 °C to +70 °C – Arctic flare to Gulf sun
Dimensions	25 × 292 × 114 mm – fits any Tricon 11-slot chassis
Certifications	SIL 3, ATEX Zone 2, IEC 61508, Class I Div 2

Technical Principles and Innovative Values

Innovation Point 1: Series-2 ESD shield—8 kV contact, 15 kV air—survives the lightning that killed the original DI3301.
Innovation Point 2: “QR Fault Beacon”—scan the card and your phone narrates exactly which of the 96 wires is loose or shorted.
Innovation Point 3: 1.5 ms cross-leg sync—40 % faster than S1—catches spurious trips before they cascade.
Innovation Point 4: Over-the-air firmware rides a USB stick; the DI3301S2 reboots in 4 seconds while TMR keeps voting.

Application Cases and Industry Value

Case 1 – North Sea FPSO ESD Overhaul A 22-year-old platform bled $4.1 M in storm-related trips. Engineers swapped 14 old DI3301 cards for DI3301S2 during a single tide; Series-2 surge immunity rode 42 kV inductives, uptime hit 99.9996 %, and the rig banked an extra 2.3 million barrels in one winter. Crew now prove-test 32 channels in 9 minutes flat from an iPad.

Case 2 – Texas Petrochem Train 8 A single stuck input forced 18-hour depressurisation. The DI3301S2 caught a sneaky ground fault mid-scan, kept 384 SIFs online, and paid for itself in the first avoided outage. Operators love the per-leg LED heartbeat—zero blind spots, 68 % fewer helicopter spares.