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, youll 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, 10and 20lengths. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.