Product Short Description
The ABB DO818 is a high-density, industrial-grade digital output module designed for the ABB S800 I/O distributed I/O system. It serves as a robust interface to convert control system logical signals into physical 24V DC switching signals to drive a wide range of field actuators. This module provides 32 individually protected output channels, organized into two galvanically isolated groups of 16 channels, delivering exceptional noise immunity and system reliability. Engineered with comprehensive built-in protections and advanced diagnostics, the DO818 ensures safe, stable, and efficient control of field devices in demanding industrial environments. It integrates seamlessly with ABB AC 800M controllers and the System 800xA platform, offering a high-channel-count solution to minimize cabinet space and optimize system cost.
Description
Technical Specifications
表格
| Parameter | Specification |
|---|---|
| Product Type | S800 I/O Digital Output Module |
| Number of Channels | 32 (2 groups of 16 channels) |
| Output Signal Type | Solid-state (high-side) switch, DC output |
| Output Voltage Range | 12 – 32 V DC (Nominal: 24 V DC) |
| Continuous Current per Channel | 0.5 A (Maximum) |
| Total Module Current | ≤ 8 A |
| Leakage Current (Channel OFF) | < 0.5 mA |
| Isolation Voltage | 50 V (Group-to-group, Group-to-backplane) |
| Output Protection | Short-circuit protection, Over-voltage protection, Over-temperature protection |
| Inductive Load Handling | Internal varistor for demagnetization / transient suppression |
| Response Time | ≤ 1 ms |
| Power Consumption | Typical 2.8 W |
| Operating Temperature | -20 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5 – 95% (Non-condensing) |
| Enclosure Rating | IP20 (IEC 60529) |
| Pollution Degree | 2 (IEC 60664-1) |
| Certifications | CE, IEC 61131-2, IEC 61000 (EMC), RoHS |
| Dimensions (W x H x D) | 45 x 119 x 102 mm |
| Weight | Approx. 0.25 kg |
| Compatible Termination Units | TU818, TU819, TU830 |
| Mounting | DIN rail mounting on S800 I/O backplane |
Functional Features
-
High-Density & Group Isolation Design
- Offers 32 output channels in a standard 45mm S800 I/O slot, maximizing I/O capacity and reducing control cabinet footprint.
- Channels are split into two electrically isolated groups (16 channels each), preventing cross-talk, eliminating ground loops, and isolating faults between different field circuits.
- Each group features an independent process voltage supervision input, enabling dedicated power monitoring for separate field segments.
-
Comprehensive Channel Protection
- Every channel is equipped with short-circuit, over-voltage, and over-temperature protection, safeguarding the module, controller, and connected field devices from electrical faults.
- Integrated inductive load suppression (varistors) safely handles the high-energy back-EMF from solenoids, relays, and motors, eliminating the need for external free-wheeling diodes.
- EMC-compliant circuitry ensures stable operation in electrically noisy industrial environments.
-
Advanced Diagnostics & Status Monitoring
- Per-channel green LED indicators provide clear, real-time visual feedback of the ON/OFF state for each output.
- Dedicated red diagnostic LEDs report module faults, group power loss, and channel-specific errors (e.g., short circuit).
- Features process voltage supervision for each group; the module detects loss of field power and transmits diagnostic data over the ModuleBus to the controller.
- Full diagnostic data is accessible via System 800xA, enabling remote troubleshooting and predictive maintenance.
-
Reliable Performance & Easy Integration
- Utilizes high-quality solid-state drivers for long operational life with no moving parts, ensuring high MTBF (Mean Time Between Failures).
- Hot-swappable design allows for module replacement under power without shutting down the entire I/O system, minimizing downtime.
- Plug-and-play integration with the S800 I/O system; automatically recognized and configured by ABB Control Builder M software.
- Supports long field cable runs up to 600 meters, offering flexibility in system design and field device placement.
Application Scenarios
The ABB DO818 is ideal for industrial applications requiring high-channel-count, 24V DC digital control:
- Manufacturing & Assembly
- Control of solenoid valves, pneumatic/hydraulic actuators, and cylinders in automated production lines.
- Driving indicator lamps, signal beacons, and small contactors on machinery and control panels.
- Switching control for conveyors, robotic grippers, and material handling equipment.
- Water & Wastewater Treatment
- Actuation of 24V valves for flow control, level control, and chemical dosing systems.
- Control of pumps, blowers, and aeration systems in treatment plants.
- Oil & Gas, Petrochemical & Chemical
- Control of process valves, actuators, and auxiliary equipment in safe areas.
- Driving alarm stacks, status indicators, and safety interlock relays.
- Power Generation & Infrastructure
- Control of auxiliary systems, cooling fans, and motor starters in power plants.
- Switching control for HVAC systems, lighting, and utility equipment in commercial and industrial facilities.
- Food & Beverage, Pharmaceutical
- Precise control of filling machines, packaging lines, and sanitary actuators.
- Operation of clean-in-place (CIP) system valves and components.
Key Advantages
- High-Density Output: 32 channels in one module reduces hardware cost and cabinet space requirements.
- Group Isolation: Enhances system safety, noise immunity, and fault isolation between field circuits.
- Built-in Protection: Eliminates need for external components, reducing wiring complexity and failure points.
- Smart Diagnostics: Enables proactive maintenance and minimizes system downtime.
- Seamless Compatibility: Fully integrated with ABB’s S800 I/O and 800xA ecosystem for a unified control solution.
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