Product Description

I. Official Standard Core Parameters

1. Basic Specifications

Model: DI2301 32-channel 24VDC Triple Redundant Digital Input Module

Material Number: 7400208-020

Channel Quantity: 32 single-ended / 16 differential selectable, point-to-point isolation

Input Type: Wet contacts (active) / Dry contacts (passive) compatible

Rated Voltage: 24VDC, operating range 15–30VDC, maximum 33VDC

Input Current: Typical 5mA, maximum 20mA

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

Response Time: <10ms (on→off / off→on)

System Architecture: TMR Triple Redundancy 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 the field side and the backplane, complete isolation between channels

Fault Diagnosis: Open circuit / short circuit / overpressure / load fault detection, signal readback verification

Protection Configuration: Each channel current-limiting protection, surge suppression

Hot Swap Function: Supports online non-disruptive insertion and replacement

Redundancy Capability: Supports dual DI2301 redundancy, automatic master-slave switching

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

Overall Power Consumption: Approximately 5W

Operating Temperature: -40℃ to + 70℃

Storage Temperature: -40℃ to + 85℃

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

Installation Method: Tricon mainframe / expansion frame I/O slot

Matching Terminal Board: 9661-210 32-channel Isolated Terminal Board

Dimensions: 170×40×200mm

Product Weight: Approximately 0.8kg

2. Panel Indicator Light Meanings

PWR (Green): Module power supply is normal

OK (Green): Triple redundancy voting is normal, module is running normally

FAULT (Red): Module / channel / diagnostic faults

CH01–CH32 (Yellow): Channel input status / fault indication

3. Main Features of the Product

Collected Signals: Limit switches, emergency stop buttons, proximity switches, relay contacts, valve feedback, on-site equipment status

Load Type: 24VDC Switching Signals, compatible with NPN/PNP type sensors

Data Interaction: TriBus Backplane High-speed Communication, Triple Redundancy 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, valve feedback collection

BMS Combustion Management: Flame detector, ignition switch, fuel valve status monitoring

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

Process Interlock: Pressure / Level / Temperature Switch, Safety Valve Feedback, On-site Equipment Status Monitoring

III. Differentiation of Similar Input Modules on the Same Platform

DI2301: 32-channel 24VDC, wet/dry contacts, SIL3, point-to-point isolation, general-purpose safety signal collection

DI2302: 16-channel 120/230VAC, SIL3, dedicated for high-voltage AC switch signals

DI2303: 8-channel 5–125VDC, wide voltage, suitable for multi-voltage level on-site equipment