The ABB 3BHE039203R0101(AC 450 Main CPU)and 3BHB021400R0002(Dual Output Power Supply)form a mission-critical control and power duo in ABB’s Advant OCS and Symphony Plus systems.The 3BHE039203R0101 delivers high-performance,redundant-capable process control with support for Profibus-DP and hot-standby operation,ensuring zero downtime in power plants and industrial facilities.Paired with the 3BHB021400R0002 power module,which provides stable+5V and+24V DC outputs with over-protection and hot-swap capability,the combination guarantees uninterrupted operation even during maintenance or component failure.Built for harsh industrial environments and proven over decades of service,this ABB pairing remains a trusted solution for legacy system reliability and long-term operational continuity.