Analog/discrete electrical interface panel with power monitoring and overcurrent protection

摘要

An alarm monitoring and electrical interface panel provides DC power to plural devices in a system as well as power and analog and/or discrete alarms to a system alarm controller in monitoring power provided to the devices within the system. The analog alarms include a first LED which turns off when input power to the electrical interface panel is lost and a second LED which turns off when output power to the device being controlled is lost such as due to a failure of the electrical interface panel. Also included is an overcurrent protection feature which limits the current provided to a powered device as well as the current provided to the system alarm controller. In the discrete alarm approach, a DC current is applied to the alarm signal for powering a device being controlled in the system. If power is lost, a third LED is turned off providing a visual indication of power failure.