G9SA safety relay unit

The G9SA series is a compact safety relay unit from Omron for monitoring safety inputs such as emergency stop buttons, door switches and light curtains. It has forced-guided relay contacts that provide reliable safety outputs, and the unit conforms to safety categories up to Category 4 and PL e depending on the wiring and model. Variants differ in the number of safety contacts, and in the presence of off-delay outputs for staged stopping, and in reset mode, either manual or automatic. The housing is narrow, typically 17.5 or 22.5 mm wide, for DIN rail mounting, and it has indicator LEDs for status. Power supply is typically 24 VDC or 24 VAC, with some models for 100 to 240 VAC. Typical applications include emergency stop circuits, guard door monitoring, robot cell safety and machine tools.