Product Overview

The ABB DI825 (3BSE036373R1) functions as a high-integrity 8-channel digital input module within the S800 I/O family. Optimized for the 800xA distributed control system, this module captures discrete signals from 125 V DC field devices. The DI825 excels in safety-critical and diagnostic applications by providing high-speed Sequence of Events (SOE) recording. Each channel maintains individual galvanic isolation to prevent cross-channel interference and protect the system backplane from field transients. We supply this unit as 100% Brand New and Original with Box, ready for immediate deployment in demanding automation environments.

Technical Specifications

Engineering Advantages

The DI825 module delivers technical solutions for high-voltage monitoring and precise fault diagnostics through its specialized hardware architecture.

• Advanced SOE Precision: The module executes Sequence of Events (SOE) recording directly at the input level. This allows engineers to reconstruct the exact order of trips or alarms in power generation and petrochemical processes with microsecond-level accuracy.

• Superior Galvanic Isolation: By providing individual isolation for every channel, the DI825 eliminates the risk of ground loops and signal leakage between field sensors. This architecture ensures that a fault on one 125V DC loop does not compromise the remaining inputs.

• High-Voltage Tolerance: Direct 125 V DC input capability allows the module to interface with heavy-duty switchgear and industrial battery systems without the need for interposing relays or external voltage dividers.

• Flexible Rack Integration: The DI825 interfaces with multiple Module Termination Units (MTUs) including the TU811 and TU813. This versatility enables the module to adapt to various wiring schemes and cabinet layouts, simplifying the upgrade of existing S800 I/O racks.

FAQs

• Does the DI825 support 24V DC input signals?

  The DI825 is specifically designed for 125 V DC signal levels to facilitate high-voltage monitoring and SOE. For standard 24V applications, please refer to the DI810 or DI818 modules within the S800 series.

• Which Module Termination Unit (MTU) should I use with the DI825?

  The DI825 requires a compatible MTU such as the TU811, TU813, or TU831. Your choice depends on whether you require screw terminals, spring terminals, or specific redundancy configurations.

• Is this a Brand New unit or a refurbished spare?

  We guarantee that this ABB DI825 3BSE036373R1 is 100% Brand New and Original in the factory box. We specialize in providing current and discontinued hardware in unused condition to ensure maximum service life.

• Can the DI825 handle high-frequency pulse counting?

  Yes. The module supports signal processing speeds up to 100 kHz, making it suitable for monitoring rapid state changes and high-speed discrete triggers in rotating machinery applications.