Product Details
Description
The DI821 3BSE008550R1 is an 8-channel high-voltage input module with individual galvanic isolation for each channel, ensuring safety and signal integrity. It includes hardware filtering to reduce AC noise and contact chatter and supports hot-swapping via MTUs for minimal downtime in critical utility and manufacturing applications.
Specifications
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Manufacturer: ABB
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Country of Origin: Switzerland
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Model Number: DI821 (3BSE008550R1)
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Product Type: Digital Input Module
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Number of Channels: 8 (Individually Isolated)
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Rated Input Voltage: 230 V AC
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Input Voltage Range: 164 to 264 V AC
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Input Frequency: 47 to 63 Hz
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Isolation: 2500 V galvanic isolation per channel
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Power Supply: 24 V DC (via ModuleBus)
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Weight: 0.35 kg
Features
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Direct Mains Sensing: Eliminates the requirement for interposing relays by directly interfacing with 230V AC field circuits.
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Individual Channel Isolation: Provides superior protection and noise immunity through independent galvanic isolation for every input path.
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Enhanced System Safety: High dielectric strength between field and logic circuits ensures the protection of sensitive controller hardware.
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Efficient Process Maintenance: Supports hot-swap functionality, enabling rapid module exchange without disrupting the operation of the remaining I/O station.
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Industrial-Grade Filtering: Integrated AC filters ensure accurate state detection by neutralizing high-frequency interference and mechanical contact bounce.
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Comprehensive Status Monitoring: An array of front-panel LEDs provides clear visual indication of individual channel logic states and module health.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Redundant Automation Systems: Core Architecture, Business Value, and Technical Advantages
Unplanned downtime poses a major financial threat to process manufacturing. To prevent costly interruptions, engineers deploy redundant PLC and DCS architectures that ensure continuous operation when hardware fails. This technical guide explores redundancy principles, critical system nodes, and real-world scenarios.
Preventing Emergency Stop Spurious Trips in Industrial Control Systems
Emergency Stop pushbuttons use Normally Closed contacts for fail-safe safety, but mechanical wear can cause costly spurious trips. This technical guide examines E-Stop contact failure root causes, redundant hardware setups, PLC logic monitoring, and maintenance strategies to maximize plant availability.
Why 24V DC Is the Universal Standard for Industrial Automation Power Supplies
Industrial manufacturing requires continuous uptime to prevent equipment damage. Unlike AC power, 24V DC circuits seamlessly integrate with UPS units and battery banks. During main grid failures, a 24V DC backup system instantly maintains PLC memory, instrument loops, and critical safety valves without interruption.