Two hand safety modules help prevent injury to machine operators by keeping their limbs away from dangerous machine movement. Two hand safety modules are made up of two elements, a control board and a safety control module. The control board has two control devices that force the use of two-hand activation simultaneously. A two hand safety module provides an emergency stop signal to the machine control circuitry when the two-hand safety device inputs are removed or released. The various types of two hand safety modules are: Type I, which requires provision of two control devices requiring the concurrent actuation by both hands; Type II, which requires the release of both control devices before machine operation may be reinitiated; and Type III, which requires concurrent actuation of the control devices within a certain time limit. Other two hand safety modules are commonly available.