Seeking info on a PA63 unit

Ok, here's an odd one... In a recent stack of items that I picked up, I came across a chassis with a status indicator panel suggesting that it was some type of reader/punch controller, and an id tag reading "Model PA63". It is obviously a DEC unit, but I've never seen any information on such a thing that I can recall. A more or less DEC standard looking wire wrapped backplane, standard 19 inch chassis about 6 inchec tall, and three fans. No power supply, but a large cable off of the backplane that looks like it was intended to connect to an external supply. Status displays for reader and punch data and status, and a reader and punch 'unit select' display. I keep thinking that if it turns out to be interesting, I might want to restore it and install it on one of my systems. But, I'll need some info and a set of prints to make any headway. Anyone familiar with this beast? -jim --- jimw(a)agora.rdrop.com The Computer Garage - http://www.rdrop.com/~jimw Computer Garage Fax - (503) 646-0174