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Integrated Controller with S7-300 CPU, Operator Panel, and AS-Interface Master
The 6ES7621-6BD02-0AE3 functions as the C7-621 ASi compact unit, integrating an S7-300 CPU, an operator panel, and an AS-Interface master into a single device . This all-in-one design combines control, HMI, and fieldbus connectivity without requiring separate components. The unit features a sealed membrane keypad with metal domes and a 2-line STN-LC display with LED backlighting . For this reason, it suits machine-level automation where space and simplicity are critical.
Technical Specifications
The table below details the key technical parameters for the 6ES7621-6BD02-0AE3 compact unit.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Product Type | Compact Controller (C7-621 ASi) |
| CPU | SIMATIC S7-300 integrated |
| Display | 2 lines x 20 characters, STN-LC, LED backlit |
| Keypad | Sealed membrane with metal domes, 23 keys (C7-621) |
| Integrated I/O | Digital I/O, 4 analog inputs, 1 analog output |
| AS-Interface | Integrated master, supports up to 31 slaves |
| Max. ASi Cycle Time | 5 ms with 31 slaves |
| ASi Cable Length | Up to 100 m |
| MPI Interface | Standard MPI for PG/PC communication |
| P Bus | Allows connection of up to 4 S7-300 modules via IM 621 |
| Rated Supply Voltage | 24 V DC (SELV) |
| Current Consumption | 1000 mA max. |
| Voltage Dip Buffering | 20 ms |
| Protection Rating (Front) | IP65 |
| Protection Rating (Housing) | IP20 |
| Dimensions (H x W x D) | 168 mm x 120 mm x 70 mm |
| Weight | Approx. 1.39 kg |
| Certifications | UL, CSA, FM (Class I, Div 2) |
AS-Interface Integration and Application
The 6ES7621-6BD02-0AE3 integrates an AS-Interface master that communicates with up to 31 slaves over a two-wire ASi cable . This network supports up to 124 digital inputs and 124 outputs, providing substantial I/O capacity for machine-level automation . The unit operates in two modes: Standard mode treats the ASi system as an analog I/O module, while Extended mode offers full AS-i master functionality via a dedicated FC . Consequently, the C7-621 ASi is ideal for packaging, handling, and assembly applications requiring both control and fieldbus connectivity in a single housing.