Layout Control System Cabling Each LCS installation requires exactly one 6-81499 LCS Power Supply with DB9 Cable. This cable connects your first device to power and your command base (if present). When you add a second and subsequent LCS device to your installation, you’ll need additional LCS PDI cables. Each piece of LCS hardware connects to the next in a daisy-chain fashion, using these cables which are available in 1’, 3’, 10’ and 20’ lengths. Go to the LCS page to learn more.