ABB SM811K01-32 (3BSE018173R1) – Switch Module for AC 800M Redundancy and CEX-Bus Expansion

The ABB SM811K01-32, article number 3BSE018173R1, is a switch/synchronization module used with the AC 800M platform. From my experience, this module is typically applied when you want stable controller redundancy and clean CEX-bus expansion without adding complexity to your cabinet. It sits directly on the base unit, pulls power from the backplane, and works quietly in the background—exactly what you want for a plant that runs 24/7.

Order Placement Process and Guarantees

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

Key Features

• Designed for AC 800M – Seamless fit in ABB Industrial IT/800xA environments; no surprises during commissioning.
• Backplane-powered – Draws power from the controller base, reducing field wiring and points of failure.
• CEX-bus expansion – Typically used to organize and stabilize communication on the controller’s CEX-bus for add-on interfaces.
• Supports redundancy concepts – In many cases applied with redundant CPUs or communication, helping minimize switchover disturbance.
• Compact module footprint – Saves cabinet space and keeps thermal load modest.
• Firmware-manageable – Works with standard ABB toolchains for configuration and updates, which tends to simplify lifecycle support.

Technical Specifications

Application Fields

You might notice that sites pick the SM811K01-32 when they’re standardizing on ABB 800xA and want predictable redundancy behavior. Typical deployments include:

• Power generation (GT/ST balance-of-plant, boiler controls)
• Oil & gas (compressor stations, FPSO utilities, refinery units)
• Chemicals and petrochemicals (reactor trains, utilities, tank farms)
• Pulp & paper (stock prep, recovery boiler, utilities)
• Metals & mining (mill drives, water systems, material handling)
• Marine and terminals (aux systems, cargo handling)

Advantages & Value

• Reliability in redundancy – Helps the controller pair behave predictably during switchover; fewer nuisance trips in most cases.
• Full compatibility – Engineered for AC 800M and 800xA, so you don’t fight firmware or mechanical mismatches.
• Cabinet efficiency – Small footprint and backplane power keep wiring simple and cooling loads reasonable.
• Lifecycle support – Firmware manageable within ABB toolsets, which eases audits and long-term maintenance.
• Cost control – Avoids overbuilding custom network hardware just to stabilize the CEX-bus path.

Installation & Maintenance

• Panel/cabinet – Install in a clean, ventilated enclosure; 35 mm DIN rail or ABB base plate mounting as per AC 800M standards.
• Environment – Keep within 0…55 °C and non-condensing humidity; allow airflow around the module.
• Wiring – No field I/O wiring to the SM811; ensure solid backplane seating and tidy cable routing for adjacent CEX modules.
• Safety – ESD protection during handling; isolate controller power before insertion/removal.
• Maintenance – Periodic dust cleaning; check seating and base contacts annually; align firmware revisions with your 800xA validation plan.
• Spare strategy – Many plants keep one spare per cabinet; it seems to be a low-effort way to shorten MTTR.

Quick feedback from a maintenance lead at a cement plant: “Swapping an SM811 during a planned stop took minutes. The controller came back redundant first time; no extra wiring or scripting.”

Quality & Certifications

• CE marked; RoHS compliant
• UL/cUL recognition typically available for AC 800M modules
• Manufactured under ISO 9001 quality systems
• Standard manufacturer warranty practices apply; commercial warranty provided here is 365 days