The end stations PEB-20 and PEB-30 are frequently used to control ventilation and light in combination with Opticon controllers. In the normal situation, the end station will be controlled by the 0-10V DC signal. In the situation that there is no control signal, the end station can be set manually at a desired output level. The PEB-20 has also an override switch to connect the input power supply directly to the output. When more capacity is required, more PEB end stations can be wired to the same control signal.