๐น Product Overview
The REXROTH SB356 is a Bosch Rexroth 3-phase multi-channel controller system used with the VM350, LTS350D, SE352 and KE350 control components. The assembly combines power electronics, control electronics and communication-related modules in a single industrial system configuration.
The SB356 power section is marked for AC 3 ร 380โ500 V input and 3000 W rated power. The associated LTS350D module provides a 330 VDC input and 3-phase 230 V output rated at 10 A, with an output-frequency range up to 1000 Hz.
This configuration is particularly useful when maintaining older Rexroth industrial equipment where the original multi-module control assembly is no longer readily available. The referenced listing identifies the unit as used, made in Germany, with an overall listed weight of approximately 30 kg.
๐ Technical Specifications
| Parameter | Details |
|---|---|
| Brand | Bosch Rexroth |
| Model | SB356 |
| Product Type | 3-Phase Multi-Channel Controller / System Box |
| MNR | R911172925 |
| Rated Power | 3000 W |
| Main Input | 3 ร 380โ500 VAC |
| Input Current | 3 ร 4.6โ3 ร 3.5 A |
| Marked Voltage | 3 ร 440/250 V |
| Frequency | 50/60 Hz |
| Main Protection / Filter Reference | FN351-16-29 |
| Enclosure Rating | IP54 |
| Associated Module | VM350 |
| Associated Module | SE352 |
| Associated Module | LTS350D |
| Associated Module | KE350 |
| LTS350D Input | 330 VDC, 10 A |
| LTS350D Output | 3-phase 230 V, 10 A |
| LTS350D Frequency | 0โ1000 Hz |
| LTS350D Switching Frequency | 12 kHz |
| SE352 Supply | 24 VDC / 5 VDC |
| KE350 Supply | 24 VDC |
| Country of Origin | Germany |
| Overall Listed Weight | Approx. 30 kg |
| Condition of Referenced Listing | Used |
The above values are taken from the product markings and supplier documentation for the SB356 system configuration. Some references show minor differences in associated module part numbers or Fd/date codes, so the physical nameplate should be used for final identification.
โ๏ธ Main Functions
- 3-phase industrial power conversion and control
- Multi-channel control architecture
- Integration of VM350 control hardware
- Integration of LTS350D drive/control electronics
- SE352 electronic control interface
- KE350 auxiliary/control electronics
- High-frequency motor/control output capability through the LTS350D
- Industrial machine control and automation
- System-level power and signal management
The SB356 is best treated as a complete system assembly rather than a standalone PLC. The individual modules inside the system perform different power, control and communication functions.
๐ Key Electrical Data
The SB356 power section is identified with:
- AC 3 ร 380โ500 V input
- 3 ร 4.6โ3 ร 3.5 A input current
- 3000 W rated power
- 50/60 Hz operation
- IP54 protection
- 3 ร 440/250 V marking
- FN351-16-29 filter/protection component
- High-leakage-current warning on the equipment marking
The associated LTS350D section is marked:
- 330 VDC input
- 10 A input rating
- 3-phase 230 V output
- 10 A output
- 0โ1000 Hz output-frequency range
- 12 kHz switching frequency
The system marking also includes a warning regarding high leakage current and the requirement to connect protective earth first.
๐งฉ Associated Components
A typical SB356 configuration may include several interconnected Rexroth modules:
VM350
The VM350 is identified as Type 0 608 750 110-101 in the referenced assembly documentation. The listed electrical data includes AC 1ร/3ร230 V and a 6.3 A rating.
LTS350D
The LTS350D is identified as Type 0608750125. It provides the 330 VDC input and 3-phase 230 V / 10 A output stage, with an output frequency listed up to 1000 Hz.
SE352
The SE352 is identified with a 24 VDC / 5 VDC supply and IP20 enclosure rating. Some configurations include an Ethernet/MAC address on the module, indicating its role within the control architecture.
KE350
The KE350 is identified as an additional 24 VDC control module. The physical configuration can vary between SB356 system assemblies, so its exact revision should be checked on the installed unit.
๐ญ Typical Applications
The SB356 multi-channel controller assembly can be found in applications involving:
- Industrial machinery
- Machine-tool control
- Motor control systems
- Industrial automation equipment
- Production machinery
- Material-handling equipment
- High-speed motor applications
- Older Bosch Rexroth drive/control installations
- Factory automation systems
Because this is a multi-component system box, the exact application depends on the machine in which the original SB356 assembly was installed.
๐ง Installation & Replacement Notes
Before replacing an SB356 assembly, compare the complete hardware configuration rather than checking only the SB356 designation.
Important points include:
- Verify the SB356 model marking.
- Check MNR R911172925 where applicable.
- Confirm the VM350 type and part number.
- Confirm the LTS350D type and output configuration.
- Check the SE352 and KE350 revisions.
- Compare all Fd/date codes.
- Verify input voltage and phase configuration.
- Check the motor/output wiring.
- Confirm protective-earth connection.
- Record existing control parameters before replacement.
The system should be isolated from power before inspection or replacement. Because the assembly carries high-voltage AC/DC circuits and has a documented high-leakage-current warning, grounding and electrical safety checks should be completed before energization.
๐ Identification References
Useful identification markings associated with this configuration include:
- SB356
- R911172925
- 0608830251
- 0608750125
- 0608830262
- 0608830264
- VM350
- LTS350D
- SE352
- KE350
- 656320209
- 656230102 / 656230209
- 1070090328
- 1070090329-402
- FN351-16-29
- 3608877428-AC1
- Made in Germany
Not every reference above identifies the complete SB356 assembly. Several are component-level numbers appearing on the associated modules, so the complete system configuration should be checked before ordering.
โ Frequently Asked Questions
Q: What is the SB356?
A: The SB356 is a Bosch Rexroth multi-channel controller/system box incorporating several control and power modules.
Q: What is the rated power?
A: The SB356 power section is marked at 3000 W.
Q: What is the main input voltage?
A: The power section is marked for 3-phase AC 380โ500 V, with 3 ร 440/250 V and 50/60 Hz markings appearing in the system documentation.
Q: What is the LTS350D used for?
A: The LTS350D section provides a 330 VDC input and a 3-phase 230 V / 10 A output, with a listed frequency range of 0โ1000 Hz.
Q: Is SB356 a standalone PLC?
A: No. It is better described as a multi-channel industrial controller/system assembly. Its operation depends on the associated Rexroth modules and the machine-specific control configuration.
Q: Is this unit new or used?
A: The referenced eBay listing identifies the SB356 as Used. The listed overall weight is approximately 30 kg.
๐ฆ Related Rexroth Models
The following are related components or system references and should not automatically be considered direct substitutes:
- REXROTH VM350 โ Motor/Control Module
- REXROTH LTS350D โ Drive/Power Module
- REXROTH SE352 โ Control/Electronic Module
- REXROTH KE350 โ Control Module
- REXROTH BP352 โ Related Control Module
- REXROTH BP351 โ Related Control Module
- REXROTH LTW01 โ Associated Control/Interface Reference
- REXROTH AD50AR03 โ Control/Memory Module Reference
- REXROTH CF350 โ Compact Flash / Control Memory Reference
- REXROTH SB356 โ Multi-Channel Controller System Box
The exact module combination varies between individual SB356 assemblies. Supplier documentation shows different SB356 configurations containing VM350, SE352, LTS350D, BP352 and KE350 components, so matching the complete assembly is recommended.
๐ ๏ธ Maintenance Recommendations
For an SB356 kept as a spare, store the unit in a clean and dry environment and protect the electronic modules from electrostatic discharge.
During incoming inspection:
- Check the enclosure for mechanical damage.
- Inspect power terminals and connectors.
- Verify the SB356 nameplate.
- Record all module part numbers.
- Check cables and internal connections.
- Inspect cooling and ventilation paths.
- Check for corrosion or contamination.
- Photograph all module labels before installation.
For a used unit, functional testing in a compatible Rexroth system or suitable test environment is recommended before returning it to production service.
๐ Ordering Information
When sourcing a replacement REXROTH SB356, provide the complete SB356 marking together with the MNR and photos of the installed modules whenever possible.
The most useful references are:
SB356 | R911172925 | 656320209 | VM350 | LTS350D | SE352 | KE350
Matching the internal module configuration is important because SB356 system boxes can be found with different component revisions and associated part numbers.
