Siemens 6SE7023-2ES87-2DA1 SIMOVERT MASTERDRIVES Braking Unit
Dynamic-braking module with a 774 V factory response threshold for compatible MASTERDRIVES DC-link systems.
ManufacturerSiemensModel6SE7023-2ES87-2DA1Product TypeSIMOVERT MASTERDRIVES braking unit
01Product Identification
Siemens 6SE7023-2ES87-2DA1 is a SIMOVERT MASTERDRIVES braking unit used to dissipate regenerative DC-link energy through an assigned external braking resistor. Siemens documents a 774 V factory response threshold, 20 kW short-duty capability over 20 seconds, 30 kW over 3 seconds and 5 kW continuous braking power. The braking resistor, fuses, wiring, ventilation and duty cycle form part of the engineered braking system and must be verified together.
Configuration ControlVerify the full article number, nameplate, electrical design, interfaces, software, wiring and lifecycle requirement before ordering.
02Engineering Data
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SE7023-2ES87-2DA1 |
| Product Family | SIMOVERT MASTERDRIVES |
| Product Type | Braking unit |
| Factory Response Threshold | 774 V DC |
| Braking Power P20 | 20 kW for 20 s |
| Braking Power P3 | 30 kW for 3 s |
| Continuous Braking Power PDB | 5 kW |
| Assigned Braking Resistor | 6SE7023-2ES87-2DC0 |
| Assigned Resistance | 20 Ω |
| Required Fuses | 2 x 3NE4102 |
| System Function | Controls regenerative-energy dissipation through an external resistor |
03Functions
Operational Functions
- Monitors the MASTERDRIVES DC link and switches an external resistor for dynamic braking.
- Uses a factory response threshold of 774 V DC for the documented application selection.
- Supports defined 20-second, 3-second and continuous braking-power classes.
- Works with the officially assigned 20 ohm braking resistor article.
- Requires two documented semiconductor-protection fuses in the engineered circuit.
- Protects the DC link from excessive regenerative energy when correctly sized and installed.
Identification
- Manufacturer: Siemens
- Model: 6SE7023-2ES87-2DA1
- Product Type: SIMOVERT MASTERDRIVES braking unit
- Status: Legacy product
04Applications
Use Cases
- Rapid deceleration of high-inertia machinery using a compatible MASTERDRIVES system.
- Hoist, winder or positioning applications that return energy to the DC link during braking.
- Legacy drive cabinets using the assigned external braking resistor and fuse arrangement.
- Maintenance replacement of an exact 6SE7023-2ES87-2DA1 braking-unit installation.
- Systems where braking duty has been calculated against the official P20, P3 and PDB values.
Compatibility Boundary
- Confirm the complete braking-unit article and the DC-link voltage class before connection.
- Use resistor 6SE7023-2ES87-2DC0 only where its 20 ohm rating and thermal installation match the application.
- Install the two 3NE4102 fuses and cable sizes specified by the engineered circuit.
- Calculate actual regenerative energy, braking frequency, duty cycle and resistor cooling.
- Do not treat published resistor dimensions as the dimensions of the braking-unit electronics.
- Follow safe DC-link discharge, grounding, insulation and high-voltage work procedures.
05Lifecycle
- The product belongs to the legacy SIMOVERT MASTERDRIVES generation.
- Preserve the complete braking calculation, resistor article, fuse selection and wiring documentation.
- No direct successor is asserted without a Siemens-supported system migration assessment.
- Inspect the resistor, cooling path, cables and protection devices when servicing the braking unit.
- After replacement, test DC-link voltage, braking response, resistor heating, fault signaling and repeated deceleration cycles.
