ABB Power Supply Unit SD821 3BSC610037R1
Description:
SD821 is the power supply unit of the ABB 800xA control system. As a robust and reliable power supply unit, SD821 is desinged to the AC 800M Controller under Installation Category III industrial mains networks. It converts selectable 115/230 V AC input into a regulated 24 V DC output with a rated current of 2.5 A and rated power of 60 W. Featuring typical efficiency of 87% and low 25 mV peak-to-peak ripple, it delivers clean, stable DC power.

Key Features
▪ Simple DIN-rail mounting design
▪ Overvoltage Category III
▪ Can be used for both nonredundant and redundant applications
▪ Green front LED to indicate normal output voltage status
▪ IP20 protection rating complying with EN 60529 / IEC 529

Application
▪ Power supply for ABB AC 800M process controllers
▪ Industrial process control systems under Category III mains environment
▪ SCADA and remote I/O station power distribution
▪ Factory automation, water treatment and light process control panels

Expert Recommendation
Always confirm the input voltage selector switch matches your local mains voltage before powering on, and deploy the recommended 10 A Type B MCB external circuit breaker for optimal long-term protection.

FAQ
Q1. What is the typical lead time for orders?
Normally takes 5–7 working days.

Q2. What's the payment term?
We accept T/T in advance.

Q3. What shipping terms can offer?
We support EXW, DAP and other common trade terms. 

Q4. What is the product warranty period?
We offer 1 year warranty.

Q5. What is ABB SD821 and which system is it compatible with?*
SD821 is a 24V DC 2.5A power supply module for ABB AC 800M controller system. It is a switch-mode power unit with selectable 115/230 VAC input, supporting both non-redundant and redundant power configurations with load sharing function.

Q6. Can SD821 work in redundant power setup?
A: Yes. SD821 supports redundant application and load sharing.