The newly introduced OZSCR1000 SCR firing board is capable of controlling a wide range of commercially available SCRs. SCRs operate similarly to diodes, with current flowing in only one direction through the device. In both SCRs and diodes, current cannot pass through the device until the anode is at a higher potential than the cathode, or what is referred to as forward bias. SCRs add additional control by delaying the flow of current until a control signal is also provided to enable a forward biased device. Current will continue to flow in an SCR until the device is reverse biased. Once an SCR turns off, it will not conduct current again until it has forward bias applied and the control signal is applied.