The Siemens 3RK1400-2CE00-2AA2 is an AS-Interface Slimline SC22.5 I/O module providing 4 digital inputs (PNP Type 2) and 4 digital outputs (PNP transistor) in a 22.5 mm wide housing for control-cabinet use. The slave profile is S-7.0.F, and the module is a standard slave with a factory-set, changeable ID1 code of F. Output circuits require an auxiliary external feed (AUX POWER) of 20 to 30 V DC, compliant with IEC 60990 (PELV), protection class III.
The module draws 200 mA when supplied solely via the AS-Interface bus, or 500 mA when an auxiliary supply (Uaux) is used — this matters for sizing the AS-i power supply and the AUX PELV supply. The 22.5 mm width and screw/snap-on mounting to DIN rail make it a tight fit for dense panels; depth is 120 mm, so verify clearance to the enclosure door or rear wall. Operating temperature range is -25 to +70 °C, with storage from -40 to +85 °C; shock resistance is 15g / 11 ms for the module alone, 10g / 11 ms with the device connector fitted.
Wiring and connection notes
Terminals accept 1x (0.5 to 2.5 mm²) or 2x (0.5 to 1.5 mm²) solid conductors; finely stranded with ferrules takes 1x (0.25 to 2.5 mm²) or 2x (0.25 to 1.0 mm²). AWG solid equivalents are 1x (24 to 14) or 2x (24 to 16). Stranded AWG is not permitted. Address setting is via the front addressing socket; input/output status is shown by yellow/red LEDs. The module supports 2- and 3-wire connection technology.
No official successor has been announced; the 3RK1400-2CE00-2AA2 remains the active order code for this AS-i SC22.5 4DI/4DQ standard slave configuration.