What this AS-Interface coupling module does
The Siemens 3RG9030-0AA00 is an FK-E coupling module that connects the yellow AS-Interface data cable and the black AS-Interface power cable into a single field-mounted junction point for digital I/O modules operating at IP67. It uses insulation-piercing contacts to tap the flat AS-Interface cable — no stripping or screw terminals — so a technician can drop it onto an existing AS-i trunk in minutes.
Lifecycle reality — end-of-life (hot)
No official successor order code is listed in the manufacturer record. For a BOM that needs this exact module, the only route is surplus or broker stock — confirmed against an RFQ.
Rated IP67, the module body and the cable entry seals (Viton end seals included in the scope of supply) keep washdown water and dust out of the AS-Interface junction — critical for food, beverage, or outdoor conveyor lines where a standard IP20 junction would fail. The contact load rating is 2 A max — this is the current each piercing tap can carry to the downstream I/O modules, not the trunk current. For a typical AS-i segment drawing 4–6 A, this module distributes power to individual drops without overloading the tap. Operating voltage matches the AS-Interface specification at 26.5 to 31.6 V — it sits on the AS-i bus without an external power supply, drawing its own logic from the yellow cable. Ambient temperature range of -25 to +85 °C means it can live inside a hot cabinet or on a machine frame near a motor — the Viton seals hold up at the high end without embrittlement.
Mounting and what ships in the box
Mounts on a standard rail or directly on a wall — the housing has no DIN-rail foot, so it screws to a backplate or clips onto a 35 mm rail via the optional adapter. The scope of supply includes one coupling module, four shaped seals, and three Viton end seals — enough to terminate both AS-i cables and seal the unused cable entry ports.