Siemens sitop redundancy module din rail siemens 6ep1962 2ba00 the siemens 6ep1962 2ba00 is a sitop redundancy module that will provide additional protection against failures of the 24v dc supply because the two power supplies are decoupled via a redundancy module the remaining power supply doesnt feed into the failed power supply the redundancy module continually monitors the feeding power supply units and when one unit fails automatically switches to the other in addition a signal