Overview
Manuals
I/O Architecture
Wiring Coordination
Module Selection Notes
Features:
- DO840 16-channel high-integrity digital output module and is verified against the exact ABB hardware marking and installed configuration before replacement.
- ABB S800 I/O 3BSE020838R1 and is verified against the exact ABB hardware marking and installed configuration before replacement.
- Provides sixteen 24 V DC output channels for high-integrity control.
The ABB DO840 3BSE020838R1 is a 16-channel high-integrity digital output module in the ABB S800 I/O. The manufacturer specifies it provides sixteen 24 V DC output channels for high-integrity control. Diagnostic supervision supports documented safety-related S800 I/O configurations. Its ordering identity combines DO840 with 3BSE020838R1; both references should be checked when selecting a replacement. Engineering confirmation should also cover approved safety design, output load, termination unit, controller firmware and project configuration and the installed base or terminal hardware before the unit is placed into service.
Before replacing DO840, record the installed position, hardware revision, mounting or connector arrangement, paired assemblies and every applicable ABB service record. Compare the supplied unit with the original item and approved configuration, isolate all relevant energy sources, and follow the documented installation procedure. After installation, inspect every affected mechanical, electrical and communication interface and complete controlled functional checks before returning the equipment to service.
The DO840 ABB High-integrity digital output module is listed as Active / Available from OEM. Current revision, availability and supplied scope are confirmed in the written quotation.
ABB DO840 documentation and reference links.
Important Notice: Every linked document must identify the listed model or its documented family. Confirm the complete order code, hardware revision and installed-system requirements before replacement.
DO840 3BSE020838R1 should be engineered using the official ABB S800 I/O documentation, with the stated 24 V DC supervised outputs matched to the configured signal path.
Before installation, confirm approved safety design, output load, termination unit, controller firmware and project configuration, the associated base or terminal hardware, and the field-side electrical conditions shown in the manufacturer's instructions.
Use the complete article number when comparing units. Channel configuration, connected equipment and any safety or communication requirements must remain consistent with the verified design.
