AS-i SC22.5 Output Module — 4 PNP, 4 A Total
The Siemens 3RK2100-1CG00-2AA2 is a Slimline Compact I/O module for control cabinet use, designated as an AS-i SC22.5 4DQ A/B slave (Spec. 3.0). It provides four digital PNP transistor outputs with a total output current of 4 A, making it a straightforward choice for switching small solenoid valves, indicator banks, or contactor coils on an AS-Interface network. It occupies a 22.5 mm wide footprint, matching the Slimline SC22.5 family's density for high-channel-count cabinets. Power for the output circuits must come from an external auxiliary feed (AUX POWER) of 20 to 30 V DC, compliant with PELV per IEC 60990. The module draws 45 mA from the AS-i bus at 30 V, or from an AS-i Power24V supply if available.
AS-Interface Slave Profile and Addressing
The slave profile is S-7.A.7, and the ID1 code is fixed at 7 — the setting cannot be changed via the front addressing socket. Address assignment is done through the front socket using an AS-i addressing tool; the module supports A/B slave addressing per Spec. 3.0, which allows up to 62 slaves on a single AS-i segment. Output status is indicated per channel via yellow/red LEDs on the front face. The outputs are short-circuit proof, which saves an external fuse per channel in most panel layouts.
Wiring and Environmental Limits
AWG equivalents are 20 to 16 for both solid and stranded. The IP20 rating means it's intended for a clean, dry control cabinet — no washdown or outdoor exposure. The module carries built-in induction protection on the outputs, which suppresses back-EMF from inductive loads like relays or contactors.