ABB DAPI100 (3AST000929R109) Ethernet Communicator Interface Module

The ABB DAPI100, ordering code 3AST000929R109, is an Ethernet communicator interface module designed to bring reliable TCP/IP connectivity to ABB systems in substations, plants, and OEM equipment. It enables fast integration with SCADA, historian, or engineering workstations, typically without reworking the underlying control logic.

From my experience, teams use the DAPI100 to modernize existing cabinets—moving from serial links to Ethernet—while keeping the original controller or relay hardware in place. You get network access, remote diagnostics, and easier maintenance, which in many cases shortens outage windows during upgrades.

• Industrial Ethernet interface – Provides a reliable 10/100 Mbps RJ?45 connection for control networks and engineering access.

• Module-level diagnostics – Status LEDs make it easy to check link/activity at a glance during commissioning.

• Seamless retrofit – Designed to sit alongside existing ABB hardware so you can migrate communications without replacing the core device.

• Backplane integration – Communicates directly with the host system, so cabling stays tidy and, typically, no separate power feed is needed.

• Remote access enablement – Supports engineering tasks like parameter updates and diagnostics over standard Ethernet networks, which usually cuts on-site time.

• Robust build for switchgear cabinets – Compact module format suited for control panels where space and uptime matter.

Integrators usually choose the DAPI100 when they need Ethernet visibility into established ABB architectures. It fits best where control reliability is non?negotiable but network data still has to flow cleanly to higher?level systems.

• Substation automation cabinets linking bay devices to station LANs

• Process plants (oil & gas, chemicals, pulp & paper) bridging control islands to central SCADA

• Water and wastewater facilities enabling remote diagnostics for distributed sites

• OEM machinery providing secure engineering access without changing the core controller

• Lower retrofit risk – Keep proven ABB hardware in place while adding Ethernet connectivity.

• Cost and time savings – Fewer panel changes and shorter outages compared to full device replacement.

• Compatibility – Designed for ABB environments, so integration steps are predictable and, typically, well?documented.

• Maintainability – Network access simplifies backups, parameter checks, and routine service.

One thing I appreciate is how it simplifies handovers: maintenance teams get straightforward link LEDs and a standard RJ?45, and that alone prevents a lot of head?scratching during night shifts. A utility client told us they swapped to DAPI100 units during scheduled bay outages and didn’t have to rewire the control side—just the network drop.

• Cabinet environment – Install in a clean, dry, ventilated control cabinet. Follow the host device’s temperature and spacing guidelines.

• Wiring – Use industrial Cat5e/Cat6 with proper shielding and grounding practices. Keep runs within 100 m for copper Ethernet segments.

• EMC – Route network cables away from high?power conductors; use ferrites if your site has known interference hotspots.

• ESD & safety – De?energize, observe ESD precautions, and insert/remove the module per ABB’s handling instructions.

• Routine checks – Inspect connectors, verify link speed/duplex on switches, and back up configuration files after any change.

• Firmware practice – Apply firmware updates during planned windows and keep a rollback plan; in most cases, keeping host and module firmware aligned prevents odd network behavior.

• Built for industrial control cabinets and substation environments

• Conforms to common industry directives such as CE and RoHS for electronic modules

• Manufacturer warranty per ABB terms (typically 12 months from delivery)

If you’re replacing a legacy communicator, share the host device type and current network setup; it helps confirm slot compatibility and any firmware nuances for the DAPI100 (3AST000929R109).