A safety programmable controller complies with the international safety standards (ISO 13849-1 and IEC 61508) and performs safety control together with safety devices connected, such as emergency stop switches and safety light curtains.
A safety programmable controller performs safety control, while a standard programmable controller performs standard control.
For example, in the system below, when a hazard is detected, the safety programmable controller shuts down the power supplied to the hazard (such as a robot) on the standard control side using a safety device connected.