The ABB DI811 (3BSE008552R1) is a 16-channel digital input module designed for the S800 I/O system. It is engineered to interface 48 V d.c. field signals with control platforms such as the ABB Ability System 800xA and Freelance systems. The module provides robust signal processing with integrated current limiting, EMC protection, and optical isolation.
Features
- 16 digital input channels configured for 48 V d.c. operation.
- Current sinking input design.
- Two isolated groups of 8 channels, each featuring dedicated voltage supervision.
- Configurable digital filtering (2, 4, 8, or 16 ms) to mitigate contact bounce and noise.
- Integrated LED status indicators for local channel monitoring.
- Process voltage supervision that reports channel errors via the ModuleBus if supply voltage is lost.
Applications
- Power and Energy: Substation automation, distribution monitoring, and generator set condition monitoring.
- Oil, Gas, and Chemicals: Process control and monitoring in refinery environments.
- Water Treatment and Building Automation: Monitoring digital feedback from pumps, valve limit switches, and various sensors.
- Metallurgy and Heavy Industry: Interfacing with proximity sensors, limit switches, and control buttons in mining or steel production.
Technical Specifications
| Model | DI811 (3BSE008552R1) |
| Number of Channels | 16 |
| Signal Specification | 48 V d.c. |
| Signal Type | Current sinking |
| Input Impedance | 11 kΩ |
| Filter Times | 2, 4, 8, 16 ms |
| Max Field Cable Length | 600 meters |
| Rated Insulation Voltage | 50 V |
| Dielectric Test Voltage | 500 V a.c. |
| Power Dissipation | 2.7 W (typ.) |
Installation Guidelines
- Ensure the system power is disconnected before installing or removing the module from the I/O rack.
- The module should be mounted in an environment free from excessive vibration and within the specified temperature ranges.
- Use shielded cables for field connections to minimize EMI, ensuring the shield is properly grounded at the appropriate termination point.
- Verify that the process voltage (48 V d.c.) is correctly applied to the supervision inputs to avoid false channel error signals.
- Handle with standard ESD precautions to prevent damage to sensitive internal electronic components.
FAQ
What is the primary function of the ABB DI811?
The DI811 is a 16-channel digital input module for the S800 I/O system, used to convert 48 V d.c. field signals into digital data for processing by ABB control systems.
How are the input channels organized?
The 16 channels are divided into two electrically isolated groups of 8 channels each, with each group featuring its own voltage supervision input.
Can the input filtering be adjusted?
Yes, the module supports selectable filter times of 2, 4, 8, or 16 ms, allowing users to tune the response to suppress noise or contact bounce.
What's clients say about us
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Guide
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