The HIRM board is part of the signaling board series manufactured by Hollysys. The signaling system in urban trains and metros enables intelligent traffic management with minimal human intervention, enhancing the speed and safety of communication lines.

Signaling systems are among the most sensitive and critical command components in urban train and metro traffic systems, and an error in their performance can have dangerous consequences.

Signaling systems in urban trains and metros consist of various input, output, interface, power supply, and processor boards. Each part of the system has a specific role.

The HIRM board is an input board responsible for receiving internal train signals and safely transmitting them to the signaling system’s processor. This board complies with the EN50155 rail standard. In the original design, relays supplied exclusively by one manufacturer were used, increasing production and repair costs. In the optimized version, European relays compliant with the EN50155 rail standard are used, reducing production and repair costs while maintaining previous performance and quality.