Product Description
The ABB DI821 (3BSE008550R1) is an 8-channel digital input module engineered for the S800 I/O system, supporting 230 V a.c. and 220 V d.c. signal levels. Each channel is individually isolated to ensure safe operation and high performance in demanding industrial control environments.
Moreover, the module incorporates voltage supervision through channels 1 and 8, which continuously monitor their corresponding channel groups. This feature enhances diagnostic accuracy and provides early warning indications via front LEDs, reducing maintenance time and improving overall system reliability.
Functional Highlights
- High Signal Integrity: Each channel features full galvanic isolation to prevent interference.
- Intelligent Supervision: Channels 1 and 8 supervise power to groups 2–4 and 5–7.
- Customizable Filtering: Adjustable filtering options (2, 4, 8, or 16 ms) optimize performance for various field signals.
- Visual Diagnostics: Clear LED indicators display module and channel status for quick on-site checks.
- Industrial Durability: Designed to meet EN 61000-6-4 and EN 61000-6-2, ensuring EMC protection and stable performance.
- Compact Build: Slim 45 mm width and light 0.18 kg weight simplify installation in tight enclosures.
In addition, the DI821 provides long service life due to its robust design, optical isolation, and low power dissipation, making it ideal for continuous operation in harsh industrial settings.
Technical Specifications
| Parameter | Value |
|---|---|
| Product ID | 3BSE008550R1 |
| Number of Channels | 8 |
| Input Voltage (Logic “1”) | 164–264 V a.c. / 175–275 V d.c. |
| Input Voltage (Logic “0”) | 0–50 V a.c. / 0–40 V d.c. |
| Input Impedance | 21 kΩ (a.c.) / 134 kΩ (d.c.) |
| Filter Times | 2, 4, 8, 16 ms |
| Operating Frequency | 47–63 Hz |
| Rated Insulation Voltage | 250 V |
| Dielectric Strength | 2000 V a.c. |
| Power Dissipation | 2.8 W (typical) |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -40 to +70 °C |
| Humidity | 5–95 %, non-condensing |
| Protection Class | IP20 |
| Compatible Terminal Units | TU811, TU813, TU831, TU839, TU851 |
| Dimensions (W×H×D) | 45 × 119 × 102 mm |
| Net Weight | 0.18 kg |
| Certifications | CE, UL, RoHS, WEEE |
Furthermore, the DI821 meets IEC/EN 61010 safety standards and integrates optical isolation between channels, preventing crosstalk or interference in noisy environments.
System Integration
The DI821 digital input module plays a critical role in distributed control systems (DCS), factory automation, and process control applications. It integrates seamlessly with ABB S800 I/O systems, offering flexible configuration and superior performance.
Typical Application Fields:
- Power generation and distribution systems
- Oil & gas control networks
- Chemical and pharmaceutical automation lines
- Water and wastewater treatment plants
- HVAC and building automation
Therefore, this module is the perfect choice for industrial facilities that demand reliable input monitoring, system integrity, and minimal downtime.
Details
| Weight | 0.18 kg |
|---|
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