ABB DP820 – PROFIBUS DP-V1 Slave Interface for S800 I/O Expansion

The ABB DP820 is designed to bridge ABB S800 I/O to a standard PROFIBUS DP network, so you can add reliable, modular remote I/O to an existing PLC or DCS—often without touching your control strategy. From my experience, plants use the DP820 when they need more field points on a Siemens or Schneider PROFIBUS backbone but want the diagnostics and channel density of S800 I/O. You might notice that commissioning is straightforward: load the GSD, map your cyclic I/O, and you’re typically ready to run.

Our Order Placement Process and Guarantees

• Warranty: 365 days from delivery
• Lead time: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment, full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• PROFIBUS DP-V1 slave connectivity – Integrates S800 I/O into most DP master systems (e.g., Siemens S7) with cyclic and acyclic data exchange.
• S800 I/O ModuleBus interface – Operates as the communication head for a stack of S800 I/O modules, simplifying distributed expansion.
• Robust diagnostics – Channel- and module-level status appears in the PLC via standard DP alarms; troubleshooting goes faster in many cases.
• Industry-proof physical layer – RS-485 PROFIBUS with typical 9.6 kbps to 12 Mbps support; shielded twisted pair cabling.
• Compact DIN-rail installation – Fits standard S800 terminal units, keeping cabinets tidy and serviceable.
• GSD-based configuration – Add the GSD to your engineering tool and map I/O with predictable addressing.
• Galvanic isolation – Helps protect upstream devices and reduces noise issues common in older plants.

Technical Specifications

Application Fields

The DP820 is commonly deployed in brownfield upgrades where existing PROFIBUS DP masters need extra I/O capacity. Typical environments include discrete manufacturing cells with Siemens S7 PLCs, utilities and water plants standardizing on PROFIBUS, and hybrid process skids that benefit from S800 I/O density and diagnostics. I’ve also seen it used to tie remote motor control centers and valve islands into the main control layer with minimal wiring changes.

Advantages & Value

• Interoperability – Works as a DP slave with mainstream PLCs; the GSD file approach keeps engineering predictable.
• Lower installed cost – Reuse existing PROFIBUS cabling and masters; add I/O where it’s needed without re-architecting the system.
• Operational reliability – S800 modules are known for solid diagnostics and stable performance under noise; this typically reduces downtime.
• Lifecycle support – ABB’s global footprint and spare parts availability simplify long-term maintenance planning.

Customer feedback: “We dropped the DP820 into an existing S7-300 DP network and brought 128 points online in a shift. The diagnostics cut our loop-check time by almost half.”

Installation & Maintenance

• Cabinet & mounting – Install on a DIN rail with the S800 terminal unit in a clean, ventilated cabinet; maintain clearance for airflow and service.
• Wiring – Use shielded twisted-pair PROFIBUS cable; bond shields at a single reference point and keep the RS-485 stub length short. Terminate the bus at both ends.
• Grounding – Ensure proper protective earth and segregate signal and power cabling to reduce interference.
• Configuration – Import the DP820 GSD into your engineering tool, assign the station address, define I/O modules, and verify diagnostics mapping.
• Routine maintenance – Periodically inspect connectors and cable shields, clean dust from ventilation paths, and back up the PLC hardware config. Firmware updates (if applicable) should be planned during scheduled downtime.
• Spare parts – Keep one spare DP820 and a set of PROFIBUS connectors on hand; it seems to be the quickest way to recover from field damage.

Quality & Certifications

• CE compliance for EMC and safety
• UL/cUL listed for industrial control equipment (typical for S800 family)
• RoHS-compliant materials
• Manufacturer warranty support; our supply warranty is 365 days

Related Components (for a complete setup)

• S800 I/O modules (AI, AO, DI, DO) compatible with the S800 ModuleBus
• S800 terminal units (TU-series) and backplane accessories for DIN-rail mounting
• PROFIBUS DP shielded cable and 9‑pin connectors; bus terminators
• GSD file for DP820 (load into your PLC’s hardware catalog)

Note: Specifications above reflect typical usage of ABB DP820 in S800 I/O systems on PROFIBUS DP. If you’re matching a legacy PLC or need a specific firmware revision, share your controller model and we’ll align the GSD and parameter set accordingly.