N4R and N4L decoders are perfectly comfortable with DC rail inputs. In fact, DC input is part of our QA test fixture.

We did not seek to power our decoders externally since self containment, including DCC from rail contacts inside the turnout roadbed, is part of the value we bring. The problem with shorting for misaligned travel through a turnout (with the opposite alignment) is eliminated by isolating the frog in the #4 (N-scale) turnout we are designed for and accomplished through our circuit design. If you need a separate bus to power the decoder and remove the short circuit (in progress) from a #6 (N scale) turnout, then you already have those #6 turnouts powered separately. You do not need to have a separate bus for a #4 Kato turnout equipped with our N4R or N4L accessory decoders! They will not short due to misalignment or bring DCC control to an unrecoverable halt. This is convenient, simple and trouble-free.

N4R and N4L do not have a local switch operational capability for alternative control near the area of the turnout. Our HO product (H6) has the capability to wire 2 local switches and will be announced shortly.