Siemens 6ES7405-0DA02-0AA0 SIMATIC S7-400 PS405 4A DC Power Supply

The Siemens 6ES7405-0DA02-0AA0 SIMATIC S7-400 PS405 power supply accepts 24, 48 or 60 V DC input and delivers 5 V DC at 4 A to the backplane bus plus 24 V DC at up to 0.5 A, with a typical active power input of 48 W. It occupies one rack slot, buffers a 20 ms mains failure per the NAMUR recommendation, and weighs 760 g.

Technical Specifications

Certifications & Standards

• CCC
• BIS

Selection Notes

At 4 A on the 5 V DC backplane bus, the PS405 4 A sizes a single-segment S7-400 rack with light to moderate module loading; check the sum of module backplane-bus current draw against this rating before adding modules. Step up to a higher-current PS405 when the rack's combined 5 V DC load exceeds 4 A or when a second unit is needed for redundant operation.

Applications

Its single-slot footprint and 24/48/60 V DC input fit a battery- or DC-bus-fed S7-400 rack with a modest module count, such as a compact skid controller. The optional lithium backup battery keeps the real-time clock and retentive memory alive through a supply interruption.