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DI821

ABB DI821 230V AC/DC Digital Input Module

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  • Manufacturer: ABB

  • Product No.: DI821

  • Product Type: Digital Input

  • Product Origin: SE

  • Payment:T/T, Western Union

  • Weight: 180g

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Overview

The ABB DI821 digital input module provides high-voltage signal acquisition for S800 I/O systems. This 8-channel module supports both 230V AC and DC inputs with individual channel isolation and advanced voltage supervision capabilities.

Key Technical Specifications

  • Brand: ABB
  • Model: DI821
  • Article Number: 3BSE008550R1
  • Product Type: Digital Input Module
  • Signal Specification: 230V AC / 220V DC
  • Channel Count: 8 channels
  • Isolation: Individual channel isolation

Electrical Specifications - AC Inputs

  • Voltage Range: 164-264 V AC
  • Input Current: 11 mA at 230V AC
  • Logic "0" Level: 0-50 V AC
  • Logic "1" Level: 164-264 V AC
  • Input Impedance: 21 kΩ
  • Frequency Range: 47-63 Hz

Electrical Specifications - DC Inputs

  • Voltage Range: 175-275 V DC
  • Input Current: 1.6 mA at 220V DC
  • Logic "0" Level: 0-40 V DC
  • Logic "1" Level: 175-275 V DC
  • Input Impedance: 134 kΩ

Voltage Supervision System

  • Supervision Channels: Channel 1 and Channel 8
  • Coverage Area: Channel 1 monitors channels 2-4
  • Coverage Area: Channel 8 monitors channels 5-7
  • Error Indication: Warning LED activates on voltage loss
  • Communication: Error signals readable via ModuleBus

Performance Features

  • Digital Filters: 2, 4, 8, 16 ms selectable
  • Analog Filter: 6 ms fixed delay
  • On/Off Delay: 5/28 ms analog filter timing
  • Dielectric Test: 2000 V AC withstand voltage
  • Power Dissipation: 2.8 W typical

Installation & Wiring

  • Cable Length AC: 200 meters maximum
  • Cable Length DC: 600 meters maximum
  • Current Limiting: MTU-controlled protection
  • Protection Class: IP20 according to IEC 60529

Diagnostics & Indicators

  • Status LEDs: Fault, Run, Warning indicators
  • Channel LEDs: Individual status for all 8 channels
  • Error Detection: Module Error, Module Warning, Channel Error
  • Voltage Monitoring: Real-time process voltage supervision

Physical Specifications

  • Width: 45 mm
  • Depth: 102 mm (111 mm with connector)
  • Height: 119 mm
  • Weight: 0.18 kg
  • Mechanics: S800 form factor

Compatibility & Certifications

  • Compatible MTUs: TU811, TU813, TU831, TU839, TU851
  • Keying Code: AC
  • Marine Certificates: ABS, BV, DNV, LR
  • RoHS Compliance: DIRECTIVE/2011/65/EU
  • Operating Temperature: 0 to +55 °C

Frequently Asked Questions

  • How does the voltage supervision work?
    Channel 1 supervises channels 2-4 and Channel 8 supervises channels 5-7, activating warnings on voltage loss.
  • What voltage ranges are supported?
    The module handles 164-264V AC and 175-275V DC inputs with individual channel isolation.
  • What are the module dimensions?
    This compact module measures 45×102×119 mm and weighs 0.18 kg for efficient installation.
🏷️ Tags: Digital Input

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