What Is SCADA? Supervisory Control Without Replacing the PLC
SCADA sits above PLCs and RTUs: it acquires field data, alarms operators, and issues supervisory commands across plants and remote assets—without replacing local deterministic control.

The 6RB2100-0NA21 is a SIMODRIVE 210 DC-FDD (Feed Drive) control unit, specialized for the analog management of up to three motion axes. Designed for legacy industrial automation applications, this APCB (Assembled Printed Circuit Board) control unit provides precise motion coordination and drive regulation. It serves as the primary intelligence for multi-axis feed drive systems, translating analog signals into controlled mechanical movement for high-precision machinery.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6RB2100-0NA21 |
| Range | SIMODRIVE 210 |
| Product Type | DC-FDD APCB Control Unit |
| Control Method | Analog |
| Axis Capacity | 3 Axes |
| Dimensions | 32.50 cm x 34.50 cm x 9.81 cm |
| Weight | 1.00 kg |
| Product Phase | Phase-Out |
| Commodity Code | 85049090 |
| Export Control (ECCN) | 3A225 |
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Returns & Warranty
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For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Dots
|
| Country of origin |
Germany
|
| Power source |
DC Power
|