Description
The ABB DO818 (3BSE069053R1) is a 32-channel digital output module designed for the S800 I/O distributed process control system. It provides high-performance 24 V DC transistor outputs, organized into two electrically isolated groups of 16 channels each. Each group incorporates dedicated process voltage supervision to ensure system integrity and diagnostics.
Features
- 32-channel digital output capacity with 24 V DC operation.
- Two individually isolated groups, each with 16 channels and a dedicated process voltage supervision input.
- High-side driver technology for each channel, providing current sourcing and current limiting.
- Integrated protection against short-circuits, over-temperature, and over-voltage conditions.
- Optical isolation barrier between the field signals and the ModuleBus.
- Inductive load suppression and output state indication LEDs for each channel.
Applications
- Oil & Gas: Flow manifold control, chemical injection, and burner management systems.
- Chemical & Petrochemical: Hazardous area isolation, reactor venting, and bulk material transfer.
- Power & Water: Backwash valve actuation, cooling fan control, and switchgear tripping.
- Mining & Paper: Sorting gates, lime kiln control, and emergency stop cascades.
Technical Specifications
| Model |
DO818 (3BSE069053R1) |
| Channels |
32 |
| Signal Type |
24 V DC (12-32 V DC range) |
| Output Current |
Max 0.5 A per channel |
| Isolation |
Two groups, 16 channels each |
| Power Dissipation |
Typ 2.8 W |
| ModuleBus Consumption |
70 mA (+5 V) |
| Max Cable Length |
600 meters |
| Insulation Voltage |
50 V (Rated) / 500 V AC (Dielectric) |
Installation Guidelines
- Mount the module horizontally on standard DIN rails. Note that vertical mounting reduces the maximum operating temperature from 55 degC to 40 degC.
- Maintain a minimum of 100 mm of clear space above and below the module to facilitate convection cooling.
- Ensure the installation environment meets Pollution Degree 2 (IEC 60664-1).
- The module is G3 coated to provide protection against corrosive environments.
- Always power down the system before inserting or removing the module from the I/O base to prevent electrical damage.
FAQ
What is the primary function of the DO818 module?
The DO818 is a high-density digital output module for the S800 I/O system, used to interface control signals from the PLC to field actuators while providing channel-level diagnostics and fault protection.
How does the short-circuit protection function?
The module limits current to approximately 1.4 A initially. If a fault persists, it switches to a lower current limit (1.1 A). If the temperature exceeds 135 degC, the module enters a PWM thermal shutdown mode to protect the circuitry.
Is this module compatible with System 800xA?
Yes, the DO818 is a standard component of the S800 I/O family and is fully compatible with ABB Ability System 800xA and AC 800M controllers.
