SYSTEM AND METHOD FOR OPERATING MONITORING ELEMENTS AND SINGLE USE ELEMENTS WITH A COMMON CABLE

摘要

A system includes a common line configured to conduct electrical power and one or more monitoring devices coupled to the common line and configured to operate when a positive voltage is provided on the common line. The system also includes a single use device coupled to the common line and an activation circuit coupled between the single use device and the common line, the activation circuit only allowing current to flow through the single use device when a negative voltage is provided on the common line.