ABB 3BSE051826R1 – S800 I/O series spare/expansion module for AC 800M and 800xA systems

The ABB 3BSE051826R1 is an original ABB part number commonly supplied for S800 I/O and AC 800M-based 800xA installations. From my experience, this code is used for field I/O or interface modules in cabinet-mounted control systems where reliability and easy hot-swap matter more than cosmetics. If you’re maintaining a mixed generation ABB line or expanding an existing cabinet, this unit typically slots straight onto a standard S800 I/O terminal base and joins the ModuleBus without drama.

Order Placement Process and Guarantees

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

You might notice that ABB part codes in the 3BSE range are designed for long service life and straightforward replacement. We verify revision levels and perform a visual/functional check before dispatch, so what arrives is ready to install.

Key Features

• Genuine ABB 3BSE051826R1 – Matches the S800 I/O form factor used with AC 800M controllers in 800xA systems.
• Plug-and-play on S800 I/O terminal bases – Typically installs on TU/TB base units with ModuleBus backplane connectivity.
• 24 VDC cabinet-friendly power – Draws power via the backplane; no extra field supply wiring in most cases.
• Hot-swap capability – Many S800 modules allow replacement without powering down the whole rack, saving downtime.
• On-module diagnostics – Status LEDs and self-diagnostics usually simplify commissioning and fault tracing.
• Industrial operating range – Built for cabinet environments with typical 0…+55 °C service temperatures.
• Long lifecycle support – ABB S800 ecosystem is widely used; spare parts and compatibles are readily sourced.

One thing I appreciate is how predictable S800 I/O behavior is between revisions—most plants tell me swap time is minutes, not hours. A maintenance lead at a chemical site said they slotted the replacement in under five minutes and the controller picked it up immediately after a simple download.

Technical Specifications

Note: Specifications above reflect the typical S800 I/O platform. The exact channel count and interface style can vary with the variant tied to 3BSE051826R1. We usually confirm the revision and functionality with photos and a test report before shipment.

Related or Supporting Products

• PM864A (3BSE018161R1) – AC 800M CPU module. For users pushing higher I/O counts or redundancy; robust performance in most 800xA projects.
• CI854A (3BSE030220R1) – PROFIBUS-DP interface. Handy if you’re bridging S800 I/O to existing PROFIBUS devices.
• CI869 (3BSE043734R1) – PROFINET interface. Typically chosen for modern Ethernet-centric architectures.
• TU830/TU835 series – Terminal units for analog/digital I/O; screw or spring terminals. Choice depends on channel density and wiring style.
• TB820V2 (3BSE013208R1) – ModuleBus Optical Interface/Link. Used for longer backbone runs or when cabinet segregation is needed.
• SD822/SD823 power distribution – Accessory base units used to tidy up 24 VDC distribution to I/O clusters.

If you’re migrating older cabinets, CI853 and CI855 can also be relevant for bridging legacy ABB I/O families. It seems to be the cleanest path when you want to keep field wiring intact but refresh the controller layer.

Installation & Maintenance

• Cabinet & mounting: Install on DIN rail within an IP20 (or better) control cabinet. Maintain vertical airflow and keep a few centimeters clearance above/below the module.
• Power & grounding: Use a stable 24 VDC supply with proper grounding. In many cases, a common 0V reference across the I/O cluster reduces noise.
• Wiring: Follow the terminal base (TU/TB) labeling; use shielded twisted pair for analog or high-noise areas and land shields at a single point to avoid loops.
• Commissioning: After insertion, check status LEDs and scan from the AC 800M controller. A quick download/scan update is usually sufficient.
• Safety: De-energize field circuits when landing wires. Observe SELV/PELV limits and separate high-voltage from I/O wiring paths.
• Routine care: Quarterly visual check of terminals, reseat connectors if needed, and keep dust off with dry air. For analog channels, annual loop checks and recalibration are good practice.
• Firmware/compatibility: Where applicable, match controller firmware to the 800xA version; I/O modules themselves are typically firmware-agnostic but the controller I/O definitions should align.

Quality & Certifications

• Certifications (typical for S800 I/O): CE; cULus Listed for industrial control equipment; RoHS/REACH compliant
• Manufacturing quality: Built under ISO 9001 quality management
• Warranty: 365 days from delivery