Basic digital output kit, Modicon STB, 24 V DC, 4 O. range of product: Modicon STB distributed I/O solution – product or component type: basic digital output kit – kit composition: STBDDO3415 module, STBXBA1000 base, STBXTS1100, 6-terminal screw type connector, STBXTS2100, 6-terminal spring clamp connector.