RS-422 Bus Surge Protector Mounted on DIN Rail

The SUG-RS422/DIN is designed to protect RS-422 networks from surges caused by lightning strikes and potential differences.

Modern solutions in the form of MOSFET fuses limit the flow of large surge currents, resulting in increased durability and significant reduction of the surge voltage reaching the protected device. An additional advantage of this solution is the limitation of equalizing currents, which can protect RS-485 interfaces from potential jumps that lead to current overload.

The structure consists of two cooperating stages of clipping and voltage limiting, as well as current limiting above 300mA. The product has very low attenuation, making it possible to transmit data at very high speeds.

The product is also equipped with protection for the screen of the cable, which can be connected to the ground of the devices.

The surge protector is designed for mounting on a DIN 35mm rail. High-quality spring terminals with high current load limit the risk of damage during large surge impulses and momentary current overloads. The device occupies the width of one standard DIN module.

The product is designed for installation on the border between LPZ0 and LPZ1 zones or higher.

Simplified internal diagram.

To ensure proper surge protection, it is recommended to use limiters at both ends of the transmission line and properly ground them.

Proper use of the product for protecting RS-485 bus.

Short technical specification