M-BUS Busbar Surge Protector Mounted on DIN Rail

The SUG-MBUS/DIN is designed to protect M-BUS networks from surges caused by lightning strikes and potential differences. The M-BUS bus is widely used for remote reading of energy, water, gas or other meters. Due to the long distances, it is particularly vulnerable to electromagnetic impulses induced during lightning strikes.

Modern solutions in the form of MOSFET fuses limit the flow of high surge currents through the limiter, 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 M-BUS interfaces from potential jumps that lead to overcurrent.

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

The built-in additional protective circuit of the wire screen can be indirectly grounded through a gas discharge tube (GDT) or directly to the ground. Connecting terminals 3 and 4 closes the connection of the wire screen to the ground.

The surge protector is designed to be mounted on a DIN 35mm rail. High-quality window clamps with high current load reduce the risk of damage during large shock impulses and temporary current overloads. The device occupies the width of one DIN standard module.

The product is designed to be mounted on the boundary between LPZ0 and LPZ1 zones or higher.

Simplified internal diagram.

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

Proper use of the product for M-Bus busbar protection.

Short technical specification