Product Description

I. Official Standard Core Parameters

1. Basic Specifications

Model: DI3301 32-channel 24VDC Triple Redundant Digital Input Module

Material Number: 7400208-030

Channel Quantity: 32 channels (common ground design, not point-to-point isolation)

Input Type: Wet Contact (Active) / Dry Contact (Passive) Compatible

Rated Voltage: 24VDC, Operating Range 15–30VDC, Maximum 33VDC

Input Current: Typical 1mA, Maximum 5mA

Input Impedance: >30kΩ (without board), ≈3kΩ (with board)

Response Time: <10ms (On→Off / Off→On)

System Architecture: TMR Triple Redundant Architecture, Three Independent Acquisition Circuits, Three-out-of-Two Voting Logic

Safety Level: Compliant with IEC61508, TÜV Certification SIL3 Level

Insulation Level: 1500VAC Isolation between Field Side and Backplane, Common Ground between Channels (No Isolation)

Fault Diagnosis: Open Circuit / Short Circuit / Overpressure / Load Fault Detection, Forced Value Diagnosis FVD, Signal Readback Verification

Protection Configuration: Each Channel Current Limiting Protection, Surge Suppression

Hot Swap Function: Supports Online Non-Maintenance Plug-and-Play Replacement

Redundancy Capacity: Supports Dual DI3301 Redundancy, Master-Slave Automatic Switching

Power Supply Method: Backplane 24VDC Power Supply (±10%)

Overall Power Consumption: Approximately 5W

Operating Temperature: -40℃ to + 70℃

Storage Temperature: -55℃ to + 85℃

Certification: CE, UL, CSA, ATEX/IECEx, TÜV SIL3

Installation Method: Tricon Host Frame / Expansion Frame I/O Slot

Matching Terminal Board: 9661-210 32-Channel Common Ground Terminal Board

Dimensions: 170×40×200mm

Product Weight: Approximately 1.42kg

2. Panel Indicator Light Meanings

PWR (Green): Module Power Supply Normal

OK (Green): Triple Redundant Voting Normal, Module Running Normal

FAULT (Red): Module / Channel / Diagnostic Fault

CH01–CH32 (Yellow): Channel Input Status / Fault Indication

3. Main Product Features

Acquisition Signals: Limit Switches, Emergency Stop Buttons, Proximity Switches, Relay Contacts, Valve Feedback, Field Equipment Status

Load Type: 24VDC Switching Signals, Compatible with NPN/PNP Type Sensors

Data Interaction: TriBus Backplane High-Speed Communication, Triple Redundant Voting Input

Configuration Software: TriStation, Can Set Input Filtering, Safety Default Values, Alarm Thresholds

II. Typical Application Scenarios

ESD Emergency Stop: Emergency Stop Button, Safety Barrier, Emergency Cut-off Valve Feedback Acquisition

BMS Combustion Management: Flame Detector, Ignition Switch, Fuel Valve Status Monitoring

Unit Control: Compressor / Steam Turbine Shaft Vibration Switch, Overspeed Switch, Interlock Status Acquisition

Process Interlock: Pressure / Level / Temperature Switch, Safety Valve Feedback, Field Equipment Status Monitoring

III. Differentiation of Similar Input Modules on the Same Platform

DI3301: 32-channel 24VDC, Common Ground Type, SIL3, High Density Low Cost, Suitable for Large-scale Ordinary Safety Signal Acquisition

DI2301: 32-channel 24VDC, Point-to-Point Isolation, SIL3, Strong Anti-Interference, Suitable for Critical Safety Signal Acquisition

DI2302: 16-channel 120/230VAC, SIL3, Special for High Voltage AC Switch Signals