The SITOP PSE202U 6EP1962-2BA00 is Siemens' NEC Class 2 compliant redundancy module, decoupling two 24VDC supplies while limiting output to 100VA at 3.8A for power-limited safety circuits.

Core Function

Two 24VDC supplies connect to the module inputs. Internal diode decoupling provides redundancy: if one supply fails, the second powers the load without interruption. The output is limited to 100VA per NEC Class 2 requirements, simplifying compliance for circuits requiring power-limited protection in North American installations.

Monitoring and Diagnostics

A green LED indicates both inputs are above the adjustable switching threshold (20-25VDC). A red LED and isolated relay contact signal when an input falls below threshold. The 95% efficiency ensures minimal heat generation in the compact 30mm-wide housing.

Installation

Snap-on 35mm DIN rail mounting. At only 30mm wide and 125g, it adds minimal space and weight. Screw terminals for secure wiring connections.