ABB SD823 3BSC610039R1 – 24 VDC Power Feed/Distribution for S800 I/O Segments

The ABB SD823 (part number 3BSC610039R1) is a 24 VDC power feed and distribution unit designed for ABB S800 I/O installations. From my experience, plants use it to bring clean, reliable 24 VDC into an S800 I/O cluster and distribute that power to modules and field loops with tidy, serviceable wiring. You might notice that it keeps cabinet layouts simpler—especially when you need structured power distribution across several termination bases (TU8xx series) on a DIN rail.

Typical use cases include powering mixed AI/DI/DO slices in process lines, packaging cells, and water treatment skids—anywhere a stable 24 VDC bus and neat power routing really matter. One thing I appreciate is how it aligns with the S800 I/O form factor, so installation feels straightforward and predictable for maintenance teams.

Company’s 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 payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• 24 VDC power feed for S800 I/O segments – Brings regulated 24 VDC into an S800 slice and distributes it across the backplane/terminal bases.
• S800 form-factor integration – Mounts alongside TU8xx termination units on DIN rail, keeping the overall footprint compact and consistent.
• Clean, serviceable wiring – Typically supports structured power routing to field devices and I/O modules, making testing and replacements faster.
• Designed for industrial panels – Suited for cabinet environments with 24 VDC control power; helps maintain organized distribution in multi-module racks.
• Stable operation in many cases – Appears to be commonly selected when teams want predictable 24 V distribution across mixed I/O.

Technical Specifications

Quick field note: a maintenance lead at a food-processing plant told us they chose SD823 to split a redundant 24 V feed across two TU bases and tidy up their loop power. The swap reduced troubleshooting time during planned shutdowns because the power segmentation was easier to trace.

Related or Supporting Products

• ABB SD822 (3BSC610038R1) – Closely related power feed unit; in many cases used when a slightly different distribution layout is needed on S800 slices.
• ABB SD821 (3BSC610036R1) – Typically a single-feed option for simpler segments where redundancy isn’t a priority.
• ABB TU810 / TU814 – S800 termination units the SD823 works alongside; choose based on channel density and field wiring style.
• ABB DI810 / AI801 – Example S800 digital and analog input modules that commonly sit on the same rail and draw the 24 VDC fed via SD8xx units.

Installation & Maintenance

• Panel & environment – Install on 35 mm DIN rail in an IP20 control cabinet with adequate ventilation. Keep 24 VDC and field wiring routed cleanly to reduce noise.
• Wiring practices – Use correctly sized conductors (often up to 2.5 mm² for control power in many panels). Ferrules and clear labeling make service much easier.
• Grounding – Bond the DIN rail and cabinet to a solid PE. Stable grounding typically improves noise immunity across the I/O slice.
• Safety – Isolate 24 VDC before replacing or re-terminating any conductors. Verify absence of voltage; lockout/tagout as per site rules.
• Routine checks – Re-torque terminals periodically, inspect for discoloration or loose strands, and keep dust off the module and terminal bases. No firmware to update on this unit.

Quality & Certifications

• Conforms to typical ABB S800 I/O quality standards; CE marking
• UL/cUL compliance in many installations (check panel listing requirements)
• RoHS compliant components
• Manufacturer’s standard warranty applies; our coverage is 365 days