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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Bosch Rexroth |
| Material Number | R911338289 |
| Type Code | HCS01.1E-W0018-A-03-B-ET-EC-NN-L3-NN-FW |
| Product Family | IndraDrive Cs |
| Drive Type | HCS01 compact single-axis converter |
| Maximum Current | 18 A |
| Continuous Current | Verify against the motor and application duty cycle |
| Supply Voltage | 200–500 V AC, ±10%, three-phase |
| Nominal Mains Frequency | 50–60 Hz |
| Control Voltage | 24 V DC, ±20% |
| Output | Three-phase AC, 0–500 V |
| Communication | MultiEthernet; verify configured protocol |
| Encoder Interface | Multi-encoder interface |
| Second Encoder Interface | Not equipped |
| Safety Function | Safe Torque Off (STO), L3 option |
| Maximum Output Frequency | Up to 1,600 Hz at 16 kHz switching frequency |
| Continuous Power Without Choke | Approximately 1.8 kW |
| Maximum Power Without Choke | Approximately 4.8 kW |
| Cooling | Internal air cooling |
| Protection Rating | IP20 |
| Width | Approximately 70 mm |
| Height | Approximately 220 mm |
| Depth | Approximately 268 mm |
| Weight | Approximately 2.0 kg |
| Firmware | Must be selected or verified separately |
Bosch Rexroth lists the exact type code as material number R911338289 in its electric-drive product data. The HCS01 IndraDrive Cs platform combines the power and control sections for compact single-axis applications.
The published HCS01 technical data identifies MultiEthernet communication, a multi-encoder interface, integrated STO, 200–500 V AC supply, IP20 protection, and frequency capability up to 1,600 Hz at the highest switching-frequency setting. Confirm all values against the current Bosch Rexroth manual before installation.
Product Introduction
Bosch Rexroth HCS01.1E-W0018-A-03-B-ET-EC-NN-L3-NN-FW, material number R911338289, is an IndraDrive Cs HCS01 compact single-axis converter rated for 18 A maximum current. It controls a compatible servo motor from a three-phase 200–500 V AC supply and provides MultiEthernet communication, a multi-encoder interface, and Safe Torque Off.
This drive suits compact machine axes, packaging equipment, handling systems, and other applications using Bosch Rexroth servo motors. Match the motor data, firmware, encoder type, communication protocol, brake circuit, and STO wiring before commissioning.
HCS01.1E-W0018-A-03-B-ET-EC-NN-L3-NN-FW
HCS01.1E-W0018-A-03-B-ET-EC-NN-L3-NN-FW
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No display or control response | Missing 24 V control supply, blown fuse, or wiring error | ✅ High | Measure 24 V DC, ±20%, at the control-voltage terminals with the correct polarity | Check the control supply and connector seating before replacing the converter |
| DC-bus undervoltage alarm | Missing phase, low mains voltage, open input fuse, or precharge fault | ✅ High | Measure all three input phases and verify the supply remains within the specified range under load | Correct incoming power and precharge faults first |
| Overcurrent during acceleration | Incorrect motor data, excessive acceleration, mechanical binding, or undersized drive | ✅ High | Read the diagnostic code and compare actual current with the 18 A maximum rating | Check motor parameters, load mechanics, and acceleration ramp |
| Encoder initialization fault | Wrong encoder selection, damaged feedback cable, or incompatible motor | ✅ High | Verify the encoder type in the drive parameters and inspect cable shielding and connector pins | Confirm the motor encoder is supported by the EC multi-encoder interface |
| EtherCAT or Ethernet communication failure | Incorrect protocol, address, cable, topology, or firmware | ✅ High | Check link LEDs, node address, network topology, and controller diagnostic messages | Verify the configured MultiEthernet protocol and firmware combination |
| STO active | Open safety circuit, failed safety relay, or incorrect L3 wiring | ✅ High | Measure the safety inputs according to the Bosch Rexroth wiring diagram; do not bypass the circuit | Restore the approved dual-channel safety circuit and validate the safety function |
| Motor will not enable | Drive inhibit, active STO, missing enable command, or parameter lock | ✅ High | Check enable status, safety status, controller command, and diagnostic buffer | Clear the actual inhibit cause; do not force enable commands |
| Drive trips after several minutes | Thermal overload, blocked cooling path, high duty cycle, or excessive cabinet temperature | ✅ High | Inspect airflow, fan operation, cabinet temperature, and load ratio | Reduce thermal loading and clean the enclosure before replacing the drive |
| Motor vibrates or hunts | Incorrect tuning, wrong motor data, resonance, or encoder feedback problem | ✅ Possible | Review tuning parameters and compare actual-versus-commanded position at low speed | Recommission motor data and tuning before condemning the hardware |
| Replacement will not boot the machine | Firmware, parameter, or communication configuration mismatch | ✅ High | Compare firmware identification and back up the original parameter set before removal | Load only the approved parameter set for the replacement revision |
| Drive reports a power-stage fault | Internal IGBT or hardware fault, shorted motor cable, or motor insulation failure | ✅ High | Isolate the motor cable and test the cable and motor separately; follow OEM test limits | Replace the converter only after external short circuits are excluded |
Important: The type code includes option and interface fields that affect compatibility. Isolate the DC bus, follow the machine lockout procedure, and wait the manufacturer-specified discharge time before touching power terminals. If the fault remains, provide the exact alarm code, firmware identification, motor model, amplifier wiring photos, and diagnostic log to technical support.
Frequently Asked Questions (FAQ)
What is Bosch Rexroth .1E-W0018-A-03-B-ET-EC-NN-L3-NN-FW?
It is a Bosch Rexroth IndraDrive Cs compact single-axis converter. The corresponding material number is R911338289. The unit is specified with an 18 A maximum current rating, MultiEthernet communication, a multi-encoder interface, and STO.
What does the 18 A rating mean?
The 18 A figure is the published maximum-current classification, not automatically the continuous motor current available in every duty cycle. Select the motor and drive using Bosch Rexroth continuous-current, overload, thermal, and application-duty tables.
Which communication protocol does the ET option support?
The ET code identifies the MultiEthernet communication configuration, but the actual protocol and firmware must match the machine controller. Confirm whether the installation uses EtherCAT, Sercos III, or another supported Ethernet protocol before ordering.
Does this drive include Safe Torque Off?
Yes. The type code includes the L3 safety option, and technical data identifies integrated Safe Torque Off. Wire and validate STO through the approved safety circuit; do not treat it as a simple drive-enable input.
Is firmware included with R911338289?
Do not assume it is. Product listings identify firmware as requiring separate selection or verification. Compare the installed unit’s firmware and parameter compatibility before replacing it.
Can I replace another drive with this unit?
Only after checking the full type code. Differences in control section, communication option, encoder interface, safety option, mains configuration, firmware, and current rating can prevent startup even when the housing looks identical.
Is this unit new or refurbished?
The part number does not establish condition. State the actual condition clearly: New Original, New Surplus, or Refurbished (tested). For refurbished stock, document power-up, control-voltage operation, communication handshake, encoder feedback, STO input behavior, cooling operation, and a loaded motor test where the correct test system is available.
