Intrinsic Safety is to limit the voltage and current so that there is never a spark with enough energy to create an explosion. Intrinsically Safe Safety Barriers are essential components of intrinsically safe applications. IDEC has combined the elements of an intrinsic barrier with those of a safety device to create the first intrinsically safe machine safety barrier. By connecting safety input devices such as emergency stop push buttons and safety interlock switches to the EB3N intrinsically safe safety barrier, in conjunction with a contactor in conformity of safety standards, both intrinsic safety and machine safety can be established simultaneously in a hazardous location. A total safety system can also be built by connecting safety control devices such as safety relay modules and safety controllers with the EB3N.