I'm working on interfacing a PLC to an existing machine that's full of relays. I got to thinking that it would be a real time saver if I had a relay breakout board of sorts. What I'm picturing is a relay base (in this case an 8 pin rectangular that plugs into an 11 pin socket) that breaks out into screw terminals.

The effect would be like piggybacking another socket on top of the original.. That would allow pre-wiring a lot of stuff and minimizing downtime, as well as making the modifications easily reversible.

So, does such a device exist?