Siemens 6EP3124-0TA00-0AY0 SITOP PSU3400 24V to 12V 15A DC/DC Converter

The Siemens 6EP3124-0TA00-0AY0 is a SITOP PSU3400 DC/DC converter that steps a 24 V DC input (14-32 V) down to a stabilized 12 V DC output at up to 15 A, with the output adjustable from 12 to 15.5 V via potentiometer. It runs at 91% efficiency, holds a 5 ms minimum buffering time at rated output, and reports output status through a relay contact.

Technical Specifications

Certifications & Standards

• CE
• EAC
• RCM
• CB
• Shipbuilding
• ABS
• DNV

Selection Notes

This is the 12 V/15 A tap of the PSU3400 DC/DC family fed from a 24 V DC bus - pick it over the 24 V-output PSU3400 variants when the downstream load genuinely needs 12 V, since the converter does not down-convert further than its fixed output tap. The output adjusts 12-15.5 V via potentiometer, which covers cable-drop compensation on long 12 V runs without a separate boost stage. A 5 ms minimum buffering time at rated output means momentary 24 V bus dips shorter than that do not reach the 12 V load, but longer interruptions need a buffer module or battery stage upstream.

Applications

Converts an existing 24 V DC control bus down to 12 V DC for loads that standardize on 12 V - sensors, relay coils, or auxiliary electronics - without adding a second mains-fed power supply next to the 24 V DC rail already in the cabinet.