Cables are available in 0.5m, 1.0m, 2.5m, and +V1 +V1 5.0m standard lengths (005=0.5m, 010=1.0m, 025=2.5m, 050=5.0m). Custom length cables +V1 are also available. +V2. For operation from a single power source +V2 +V2 connect COM0 through COM3 terminals together.