Product Description

I. Official Standard Core Parameters

1. Basic Specifications

Model: DI6503 32-channel 24VDC Triple Redundant Digital Input Module

Material Number: 7400208-040

Channel Quantity: 32 channels, point-to-point isolation (optical isolation)

Input Type: Wet contact (active) / Dry contact (passive) compatible, Sink/Source universal

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

Conduction Threshold: ≥18VDC (ON); ≤5VDC (OFF)

Input Current: 5–10mA per channel (typical)

Response Time: <10ms (software programmable filtering)

System Architecture: TMR Triple Redundancy, three independent acquisition, three-out-of-two voting

Safety Level: IEC61508, TÜV Certified SIL3

Insulation Voltage: Field ↔ Backplane 1500VAC, complete isolation between channels

Fault Diagnosis: Open circuit / Short circuit / Overpressure / Load fault, readback verification, FVD mandatory value diagnosis

Protection Configuration: Each channel current limiting, surge suppression, reverse polarity protection

Hot Swap: Supports online replacement, no system disturbance

Redundancy Capability: Supports dual DI6503 redundancy, automatic master-slave switching

Power Supply Method: Backplane 24VDC (+/-10%)

Overall Power Consumption: Approximately 8W

Operating Temperature: -40℃ to + 70℃

Storage Temperature: -40℃ to + 85℃

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

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

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

Dimensions: 225×112×40mm

Product Weight: Approximately 2.2kg

2. Panel Indicator Light Meanings

PWR (Green): Module power supply is normal

OK (Green): TMR voting is normal, module operation is normal

FAULT (Red): Module / Channel / Diagnostic Fault

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

3. Main Product Features

Acquisition Signals: Emergency stop button, limit switch, valve feedback, proximity switch, flame detector, pressure / level / temperature switch

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

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

Configuration Software: TriStation, configurable filtering time, safety default values, alarm thresholds

II. Typical Application Scenarios

ESD Emergency Stop: Emergency stop button, safety barrier, valve feedback acquisition

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

F&G Fire and Gas System: Smoke / Temperature / Combustible Gas Detector Switch Signal

Unit Control: Compressor / Turbine overspeed, shaft vibration, interlock switch status acquisition

Process Interlock: Critical pressure / level / temperature switch, safety valve feedback monitoring

III. Differentiation of Similar Input Modules on the Same Platform

DI6503: 32-channel 24VDC, point-to-point isolation, SIL3, high density, high anti-interference, priority for critical safety signals

DI2301: 32-channel 24VDC, point-to-point isolation, SIL3, standard type, universal critical signals

DI3301: 32-channel 24VDC, common ground type, SIL3, high density, low cost, ordinary signals

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