B&B DINRAIL RS422/485 SURGE PRO.The B&B DINRAIL RS422 485 SURGE PRO (Model HESP4DR) is a rugged, DIN rail mounted protection device designed to shield industrial RS 422 485 communication lines from lightning, surges, and voltage disturbances. Built for harsh environments and continuous operation, this surge protector ensures data integrity and minimizes downtime in automation, process control, and remote monitoring systems. With five protected RS 422 485 channels and a precise
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