4-track RS-232 bus surge protector mounted on DIN rail

The SUG-RS232-4P/DIN is designed to protect the RS-232 port against overvoltage in PC computers or industrial controllers. It includes 4 protected channels + ground (cable shield), which can be used for RX, TX, RTS, and CTS signals. Each signal can be assigned to any of the terminals of the protector.

It uses modern solutions in the form of MOSFET fuses, which limit the flow of high surge currents through the protector, 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 the possibility of equalizing currents between individual devices.

The structure consists of four protective channels with voltage and current limiting stages above 300mA. The product has very low attenuation, making it possible to transmit data at very high speeds.

The signal ground, which also serves as the cable shield, is protected against potential differences with respect to ground and individual transmission wires.

The surge protector is designed to be mounted on a DIN 35mm rail. High-quality window clamps with high current load capacity 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 protecting the RS-232 port.

Short technical specification