What It Is — The AS-i Addressing Gateway
The 3RK1901-1MA00: This is the AS-Interface coupling module with an integrated addressing socket for two AS-i cables (yellow flat cable). It's the piece that bridges the AS-i network to the handheld addressing tool — not a standard I/O slice, but the connection point where you commission and service the slaves on the yellow cable. Part of the Siemens SIRIUS AS-Interface system, it's a common sight in automotive body shops, conveyor lines, and material handling installations where the yellow AS-i cable runs the length of the machine.
Sourcing Reality — Quoted to Order
Sourced through independent distribution channels.