Description
Bosch Rexroth HCS02.1E-W0028 IndraDrive C Converter
Product Overview
The Bosch Rexroth HCS02.1E-W0028 is a compact converter in the IndraDrive C HCS02 family, intended to provide the power stage for single-axis motion-control applications. The HCS02 platform integrates the inverter and power-supply functions into a compact drive unit and is designed for direct mains connection in the 200–500 V range. For the W0028 size, Bosch Rexroth documentation specifies 12 A continuous output current, 28.3 A maximum current, and approximately 4 kW typical motor capacity.
A critical procurement point is that HCS02.1E-W0028 is not, by itself, the complete electronic specification of an installed servo drive. Complete configurations add suffixes such as -A-03-NNNN, -A-03-NNNV, or -A-03-LNNN. Those extensions determine the actual control-section and option configuration. For example, documented complete variants include HCS02.1E-W0028-A-03-NNNN and .1E-W0028-A-03-LNNN.
The .1E- belongs on the power side of an IndraDrive C motion system rather than being treated as a conventional PLC or DCS module. The power section works with a separately specified control section that provides the automation, encoder, safety, and additional I/O interfaces required by the particular application. Bosch Rexroth’s project-planning documentation explicitly separates the power section from the control section.
Product Introduction
Motor applications that require a compact single-axis drive often use the architecture because the converter combines the inverter and power-supply functions in one enclosure. The .1E- occupies the 28.3 A maximum-current size within this family and is commonly associated with motors around the 4 kW class.
For a legacy replacement, the dangerous assumption is that every unit is electrically identical once the front label looks correct. The complete order code, control section, firmware, motor data, encoder interface, and safety configuration need to match the machine application.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | .1E- |
| Manufacturer | Bosch Rexroth |
| Product Family | IndraDrive C |
| Product Type | Compact converter / drive power section |
| Continuous Output Current | 12 A |
| Maximum Output Current | 28.3 A |
| Typical Motor Rating | Approximately 4 kW |
| Mains Voltage | 200–500 VAC class for 3-phase supply |
| 1-Phase Supply Range | 200–250 VAC for applicable configurations |
| Mains Frequency | 50–60 Hz |
| Output | 3-phase AC, variable output |
| Maximum Output Frequency | Up to 400 Hz at 4 kHz switching; up to 1,600 Hz at 16 kHz switching |
| Cooling | Internal air cooling / integrated blower |
| Protection Rating | IP20 |
| Typical Application | Single-axis servo/motion drive |
| Control Section | Separate, configuration-dependent |
| Complete Order-Code Examples | .1E–A-03-NNNN; .1E–A-03-NNNV; .1E–A-03-LNNN |
| Weight | Approximately 3.8 kg for the power section without control section/accessories |
| Installation | Cabinet-mounted drive system |
The published technical data gives the a 12 A continuous current and 28.3 A maximum current. It lists approximately 5.1 kW continuous power with a power choke and 10 kW maximum power with a choke, while the typical motor rating is around 4 kW. These power figures should not be interpreted as a universal motor-selection rating; actual capacity depends on mains voltage, switching frequency, thermal conditions, motor characteristics, and application duty.
The published complete configurations are approximately 65 mm wide × 251.5 mm high × 352 mm deep, although mechanical installation clearance and cabling space must also be allowed. A complete configuration with integrated 24 V power supply can weigh more than the base power section.
HCS02.1E-W0028
Major Features and Practical Advantages
1. Compact IndraDrive C architecture
The is part of Bosch Rexroth’s IndraDrive C family and combines inverter and power-supply functions into a compact converter. This makes the suitable for machine axes where cabinet space and modular drive architecture matter.
2. 28.3 A peak-current capability
The size provides 28.3 A maximum current against a 12 A continuous-current rating. That difference is significant when reviewing acceleration, peak torque, and overload requirements. A replacement should therefore be evaluated against the machine’s actual duty cycle rather than simply its nominal motor kW.
3. Broad 200–500 VAC supply class
The platform supports direct mains connection in the 200–500 V range. Published data also identifies a 200–250 V range for applicable single-phase configurations. The exact permissible connection depends on the complete drive configuration and supply arrangement.
4. Internal forced-air cooling
The uses internal air cooling with an integrated blower. This is useful for maintaining the required thermal operating conditions at the stated current rating, but it introduces another maintenance item: fan condition and cabinet airflow should be checked on older machines. A power section with a degraded cooling system can exhibit intermittent faults that initially look like control or motor problems.
5. Flexible control-section architecture
The power section accepts a separate control section. Bosch Rexroth documentation explicitly lists control-section and power-section components separately, allowing the same power size to be configured for different automation, encoder, safety, and I/O requirements.
This is why purchasing only by the short code can be risky. Two .1E- units may share the same power-stage designation while carrying different complete order codes.
6. High switching-frequency capability
Published data lists maximum output-frequency ranges associated with switching frequencies from 4 kHz through 16 kHz, reaching up to 1,600 Hz at 16 kHz switching. This does not mean every motor/application should be operated at that setting. Higher switching frequencies can change thermal loading and should be selected according to the motor and application requirements.
7. IP20 cabinet installation
The is an IP20 component intended for installation inside an appropriate electrical cabinet or enclosure. It should not be treated as a field-mounted, environmentally sealed drive. Cabinet cooling, contamination control, grounding, and required clearance remain part of the installation design.
Related Products
- .1E-W0012 — Smaller converter size with approximately 4.5 A continuous and 11.5 A maximum current; typically around 1.5 kW.
- .1E-W0054 — Larger size providing approximately 20.6 A continuous and 54 A maximum current; typically around 7.5 kW.
- .1E-W0070 — Larger 70.8 A maximum-current size, typically used around the 11 kW motor class.
- .1E–A-03-NNNN — Complete configuration with the documented A-03-NNNN extension.
- .1E–A-03-NNNV — complete configuration with integrated 24 V supply designation in the published product data.
- .1E–A-03-LNNN — complete configuration with a different control/option extension; do not assume it is electrically or functionally identical to NNNN.
- MSK Series Motors — Bosch Rexroth IndraDyn motor family used with applicable IndraDrive configurations; motor feedback and power requirements must match the control section and application.
- IndraDrive C Control Sections — Separate control hardware providing the communication, encoder, safety, and I/O functions required by the selected drive configuration.
FAQ
Is .1E- a complete servo drive?
Not necessarily. .1E- identifies the power-section size. A complete IndraDrive C configuration normally adds the control-section and option suffixes. The installed machine should therefore be matched using the full type code, not just .
What motor size does the support?
The published family data gives approximately 4 kW typical motor rated capacity for .1E-. Actual permissible motor selection depends on supply voltage, operating duty, cooling, switching frequency, motor characteristics, and application requirements.
What is the continuous current rating?
The published rating is 12 A continuous output current, with 28.3 A maximum current. The two numbers should not be treated as interchangeable; continuous thermal loading and short-duration peak torque have different limits.
Can I replace .1E- with another unit?
Only after checking the complete configuration. Compare the full order code, control section, firmware, motor/encoder configuration, safety options, mains supply, and machine application. A power section with a different control configuration is not automatically a drop-in replacement.
Can I hot-swap this drive?
Do not treat it as a hot-swappable PLC module. The drive is connected to hazardous mains and motor power circuits, and the DC bus can remain energized after power removal. Proper isolation, discharge verification, and the manufacturer’s replacement procedure are required before removing the unit.
Does .1E- support encoder feedback?
The architecture can be configured with control sections providing encoder interfaces, but the short power-section designation .1E- does not establish which encoder interface is installed. The complete control-section order code must be checked.
Does this part have firmware?
The system uses a control section and associated firmware. Firmware compatibility therefore needs to be checked against the installed control section and IndraDrive application. Do not assume a particular firmware revision solely from .1E-.
What should I check before purchasing a replacement?
Record the complete existing type code, including all suffixes after .1E-. Then compare the control section, firmware, motor feedback type, safety configuration, mains supply, cabinet cooling, and machine parameters. If possible, preserve the existing drive parameter set before replacement.
Procurement Note
The Bosch Rexroth .1E- should be purchased as an IndraDrive C power-section component, not as a generic 4 kW VFD. The 12 A continuous / 28.3 A maximum current rating and approximately 4 kW typical motor class are well documented, but those numbers do not define the complete installed drive.
For a legacy machine, the full suffix is the first thing to record. Published examples include .1E--A-03-NNNN, .1E--A-03-NNNV, and .1E--A-03-LNNN. The different configurations should not be mixed simply because the base designation is identical.
When receiving New Surplus or previously installed inventory, inspect the cooling fan, DC-bus/power terminals, connectors, housing, nameplate, and control-section interface. For an installed replacement, recover the drive parameters and confirm the motor and feedback configuration before energization.
One practical rule: match the complete Bosch Rexroth order code and control section, not just “.” That is the difference between a controlled replacement and a drive that merely fits the cabinet.
