The DCC Specialties Block Watcher manual indicates input power is connected to J1 and output power is connected to J2.   The associated note indicates that  proper polarity must be maintained by connections at these terminals.  Is polarity of the connection at J1 pin 1 to be maintained by the connection to J2 pin 1? Thanks in advance for your help..............Robert T

Hi Robert, Yes. J1-1 goes to J2-1. J1-2 goes to J2-2. The reason for the note is that some folks don't check the labels and assume J2-1 is straight across from J1-1. It isn't.