If you have more than 4 lines, the surge suppressors can be linked together with the included grounding arm. 4 Modular phone cords are included to aid installation. A built in wire holder at the bottom keeps wiring nice and neat. While it is big enough to keep the 7805 from overheating and shutting down, it can get very hot if you have a few daughterboards. To keep your 7805 cooler, we now offer a larger heatsink with almost triple the surface area to help keep your 7805 cooler.
Installation is a snap.
Just unscrew the 7805 mounting screw, remove the old heatsink and slide the new one under the 7805. Reinstall the screw and your HCS-II 7805 will run much cooler. The HCS-II does not require a PC to be connected to it for proper operation. However, many people leave a serial cable connected between their PC and HCS-II for monitoring purposes and to avoid fighting with cables each time they want to update their code. These serial cables can often be long which makes them likely to induce surge transients.