TheSchneider Electric SR2CBL01 is a connecting cable designed for Schneider Electric's Zelio Logic smart relay series (SR2 and SR3) . This 3-meter cable features a SUB-D 9-pin connector on the PC side and connects to the smart relay's programming port, enabling a serial RS232 connection between the relay and a computer . It is used with the Zelio Soft programming software to download, upload, and monitor control programs, allowing users to program the relay comfortably even when installed inside a control cabinet
