Siemens 3RK1901-1MX00 Extension Plug

Siemens 3RK1901-1MX00 AS-Interface Extension Plug is a bus accessory that doubles the reach of an AS-Interface network by enabling a total cable length of up to 200 m per segment. This IP67-rated extension plug has no slave device integrated and is designed to be connected via an AS-Interface M12 feeder (3RX9801-0AA00 must be ordered separately), allowing its function to act as a pass‑through in the bus chain. It draws power from the AS-Interface supply, with operating voltage specified as 26.5 to 31.6 V and a maximum current draw of 10 mA, and it includes status indication with a green LED to show power presence and a separate signaling behavior for undervoltage. The 3RK1901-1MX00 is part of Siemens’ AS-Interface accessory lineup and is intended for use within AS-Interface installations where extended cable runs improve node placement without adding active slaves.