What this AS-i feeder does on the line
The 3RK1901-1NR00: This is a 4-port M12 breakout for AS-Interface flat cable — it transitions the two-wire AS-i bus plus auxiliary power (Uaux) into four M12 sockets, each carrying both signal and 24V aux power per the pinout: pin 1 = AS-i +, pin 2 = Uaux -, pin 3 = AS-i -, pin 4 = Uaux +. The insulation-piercing connection method means you lay the AS-i flat cable into the housing and clamp down — no stripping, no separate terminals. The coupling module (FK-E) is included in the delivery. Rated IP67, so it lives on the machine frame or in a washdown zone without a separate enclosure. Ambient range -25 to +85°C covers most plant-floor conditions including hot motor cabinets.
Current production — no obsolescence concern
Mounts on standard DIN rail or directly to a wall plate. The 4 × M12 sockets accept standard M12 cordsets, so field wiring uses off-the-shelf cables. Each contact is rated 4 A max — enough for a bank of sensors or small actuators downstream. The operating voltage follows the AS-Interface spec at 26.5 to 31.6 V.
Sourcing this part for a BOM line
If you need a second source, the closest functional match would be another AS-i M12 feeder with the same 4-port, IP67, Uaux-capable layout — confirm the pin assignment matches your harness before substituting.