HCS01.1E-W0028-A-03-B-ET-EC-NN-L4-NN-FW 28A STO SBC Drive

The HCS01.1E-W0028-A-03-B-ET-EC-NN-L4-NN-FW combines the highest current class used in this upload group with the L4 safety option. It is designed for compact single-axis cabinets that need 28 A peak capability, BASIC control performance, MultiEthernet connectivity and multi-encoder motor feedback.

The safety field is the decisive differentiator. L4 provides Safe Torque Off and Safe Brake Control, while the otherwise similar R911325248 NN version does not contain this safety option. For replacement work, the existing safety contacts, brake circuit, firmware and motor data must be checked before the unit is energized.

Key Features

· 28 A current class for dynamic single-axis loads

· 11.52 A continuous-current reference

· BASIC control with ET MultiEthernet

· EC multi-encoder evaluation

· L4 STO and Safe Brake Control

· Compact IP20 control-cabinet construction

Typical Applications

· Vertical axes with holding brakes

· Higher-current packaging axes

· Automated handling systems

· Machine retrofits retaining the exact R911331611 configuration

Compatibility and Selection Note

Use this L4 model only where the machine electrical drawing and safety validation specify L4. The full material number, firmware, brake data, encoder and mains components should match the original installation.

Frequently Asked Questions

Q1 Why is L4 important on a vertical axis?

L4 combines STO with Safe Brake Control, allowing the drive safety circuit to supervise a compatible holding-brake function. The complete machine safety design still requires validation.

Q2 Is this identical to the W0028 NN model?

No. The power class is similar, but the safety hardware and connections differ. Use the complete suffix and material number.

Q3 What does the B code indicate?

B identifies the BASIC control-section performance class in this HCS01 configuration.

Q4 Can MultiEthernet communicate with a non-Rexroth controller?

It can support multiple Ethernet-based automation environments when the required protocol is available in the selected firmware and project.

Q5 Does the 28 A value equal continuous current?

No. The model current class is 28 A maximum. The reference continuous current is 11.52 A under the stated technical conditions.

Q6 What must be supplied for an exact replacement quote?

Provide the full code, R911331611, firmware code, motor model, fault description and clear photos of the drive and connectors.