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The ABB DO818 (3BSE069053R1) is a high-density 32-channel digital output module designed for the S800 I/O distributed process control system. It provides reliable 24 V DC transistor-based output switching, organized into two electrically isolated groups of 16 channels. Each group includes an integrated process voltage supervision input to monitor supply health.
Features
- 32 digital output channels configured as current sourcing with current limiting.
- Two individually isolated groups (16 channels per group) with dedicated process voltage supervision.
- High-side driver technology featuring short-circuit, over-voltage, and over-temperature protection.
- Integrated EMC protection and inductive load suppression for robust operation in industrial environments.
- Optical isolation barrier between the field signals and the internal ModuleBus.
- Status indication LEDs provided for each output channel.
Applications
- Oil & Gas: Control of flow manifolds, chemical injection systems, and burner management.
- Chemical & Petrochemical: Hazardous area isolation, reactor venting, and bulk transfer control.
- Power Generation & Water Treatment: Management of cooling fans, backwash valves, and switchgear trip signaling.
- Pulp, Paper, & Mining: Implementation of sorting gates, lime kiln controls, and emergency stop cascades.
Technical Specifications
| Model | DO818 (3BSE069053R1) |
| Channels | 32 |
| Signal Type | 24 V DC (12 - 32 V DC range) |
| Output Current | 0.5 A per channel (max continuous) |
| Power Dissipation | Typ 2.8 W |
| ModuleBus Consumption | 70 mA (+5 V) |
| Insulation Voltage | 50 V rated / 500 V AC dielectric test |
| Max Cable Length | 600 meters |
Installation Guidelines
- Horizontal Mounting: Mount the module horizontally on standard DIN rails to ensure optimal thermal dissipation. Vertical mounting reduces the maximum operating temperature rating from 55 degC to 40 degC.
- Airflow: Maintain a minimum clearance of 100 mm (4 inches) above and below the module to facilitate convection cooling.
- Environment: Designed for Pollution Degree 2 environments (IEC 60664-1). Conformal coating is applied to meet G3 severity levels for corrosive atmospheres.
- Safety: Always disconnect power before inserting or removing the module from the I/O base to prevent electrical arcing or damage to the ModuleBus pins.
FAQ
What is the primary function of the DO818 module?
The DO818 is a digital output module for the ABB S800 I/O system, used to drive field devices such as solenoids, relays, or indicators within the 800xA control environment.
How does the module handle short circuits?
The module utilizes current limiting. If a short circuit occurs, the output enters a pulsed mode to limit current. If temperatures exceed 135 degC, the module performs a selective thermal shutdown to protect the internal circuitry.
Can I isolate different voltage segments?
Yes, the 32 channels are divided into two isolated groups. This allows for the separation of power segments or different voltage domains within the allowed 12-32 V DC range.
What's clients say about us
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Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.
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Engineering Lead, GermanyTop-tier Service and Quality
We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.
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Operations Director, GermanyRelated Products
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