S485-fibre optic converter for long-distance data transfer of an RS485 line, via a fiber optic backbone. The converter can be used in point-to-point topology, with sections of maximum length of 2km or in ring topology, maximum 4km. The converter allows you to increase the extension of the serial line, beyond the physical limits of RS485; it is also particularly recommended to transport data in highly disturbed environments, create open field connection backbones, immune to the effects of atmospheric discharges, eliminating mass loops between devices. Master/Slave operating mode. Functional programming can be set via dip-switch Activity monitored by 3 signal LED: power supply unit, fiber optic data reception, RS485 Bus data reception. ABS casing. Dimensions (L x H x D) 140 x 92 x 38mm. Red color.