Description
Bosch Rexroth LTS350D | 0 608 750 125 Servo Amplifier
Product Introduction
In a Rexroth tightening system, the servo amplifier is part of the coordinated fastening channel—not a standalone drive that can be substituted based on voltage and current alone. The Bosch Rexroth LTS350D (0 608 750 125) is designed to control EC motors used with tightening spindles. Digital control parameters are transmitted from the SE control unit to the amplifier, and the module includes an integrated motor contactor for the motor-stop function.
The LTS350D is intended for installation in a BT356 card rack or SB356 system box. Its documented electrical data includes a 220–330 VDC intermediate circuit, three-phase motor output up to 230 VAC, and motor-dependent current limits of up to 12 A rated and 50 A peak. For replacement procurement, confirm the system electronics, supply module, spindle, and parameter configuration before approving a surplus unit for production use.
LTS350D 0608750125
Key Technical Specifications
- Model: LTS350D
- Order Number: 0 608 750 125
- Manufacturer: Bosch Rexroth
- Product Category: Digital servo amplifier
- Application: EC motor control for tightening spindles
- Input Supply: From the system supply module
- Intermediate-Circuit Voltage: 220–330 VDC
- Control Voltage Rails: +24 VDC, −24 VDC, and 5 VDC
- Motor Output Voltage: Three-phase, 0–230 VAC
- Output Frequency: 0–1,000 Hz
- Rated / Peak Output Current: Up to 12 A / 50 A, depending on the connected motor
- Maximum Motor Cable Length: 100 m
- System Installation: BT356 card rack or SB356 system box
- Motor Stop Function: Integrated motor contactor
- Display: LC display for tightening results and system information
- Environmental Protection: IP20 when installed
- Permissible Ambient Temperature: 0°C to +55°C with fan
- Operating Humidity: 20–90% RH, non-condensing
- Dimensions (W × H × D): 46 × 271 × 285 mm
- Weight: Approximately 2.7 kg
These values are drawn from the LTS350D/LTE350D operating instructions and Rexroth tightening-system catalog. Current limits depend on the connected motor; verify the specific spindle and system documentation before commissioning.
Global Sourcing & Live-Test SOP
For a used or surplus LTS350D, test the module within a compatible tightening-system environment. A successful power-up alone does not prove spindle-control functionality.
5.1 Inbound Verification
- Photograph the complete nameplate and confirm .
- Verify order number 0 608 750 125.
- Distinguish it from LTE350D, order number 0 608 750 126.
- Inspect the rack interface, connectors, front panel, and retaining hardware.
- Check for corrosion, heat discoloration, cracked housings, or signs of unauthorized repair.
- Record serial number and available hardware/revision information.
- Confirm whether the listing includes only the amplifier or additional rack/system components.
5.2 Electrical and Physical Inspection
- Inspect the module before installation.
- Confirm compatibility with the installed Rexroth supply module and rack.
- Verify protective grounding and the prescribed system wiring.
- Inspect connectors and mating interfaces for damage or contamination.
- Do not apply external power to unidentified pins.
- Follow the OEM discharge and isolation procedure before handling or removing the module.
5.3 Controlled Functional Test
- Test in a compatible BT356 rack or SB356 system box.
- Confirm recognition and communication with the SE control unit.
- Verify the connected spindle and motor configuration.
- Confirm the correct parameter set is available and loaded.
- Test the display and diagnostic functions.
- Perform controlled spindle operation using suitable mechanical safeguards.
- Monitor motor response, drive faults, current behavior, and stop-function operation.
- Record the system configuration and all observed faults.
5.4 Extended Run and Final Preparation
- Run the module under controlled conditions with a compatible spindle.
- Monitor temperature, current, system alarms, and communication stability.
- Record test duration, rack and supply-module details, spindle type, and parameter configuration.
- Protect the rack connector and module edges during shipment.
- Use ESD-safe packaging and suitable cushioning.
- State the actual condition accurately: tested, untested, refurbished, or as-is.
Field Engineer’s Pitfall Guide
❗ Do not substitute LTE350D for by family name alone
Rexroth assigns the to tightening spindles and the LTE350D to ErgoSpin/CC-ErgoSpin hand-held nutrunners. Their system roles differ. Confirm the complete order number and application before considering a substitution.
❗ The is not a standalone drive
The amplifier receives power from the system supply module and operates within the Rexroth tightening-system architecture. Confirm rack, SE control unit, supply module, spindle, and parameter compatibility before installation.
❗ Do not treat peak current as a continuous rating
The documented current limits are motor-dependent, with up to 12 A rated and 50 A peak. Do not use the peak value for continuous sizing or assume every spindle can operate at those limits. Verify the connected motor’s approved operating data.
Intent-Driven FAQ
What is the Bosch Rexroth ?
The is a digital servo amplifier for EC motor control in Rexroth industrial tightening-spindle applications.
What is the order number for the ?
The documented Bosch Rexroth order number is 0 608 750 125.
What system does the belong to?
It belongs to the Rexroth Tightening System 350 and is designed for installation in a BT356 card rack or SB356 system box.
What are the ’s electrical ratings?
The documented intermediate-circuit range is 220–330 VDC. Motor output is three-phase, 0–230 VAC, with current limits up to 12 A rated and 50 A peak depending on the connected motor.
Can the replace an LTE350D?
Not automatically. Rexroth specifies the for tightening spindles and the LTE350D for ErgoSpin/CC-ErgoSpin hand-held nutrunners. Verify the system application and order number before replacement.
Is the a standalone servo drive?
No. It is designed to operate within the Rexroth tightening-system architecture, with power supplied from the system supply module and control parameters transmitted from the SE control unit.
What should buyers verify before ordering?
Confirm the exact model and order number, rack compatibility, system supply and SE control unit, connected spindle, connector condition, serial/revision details, and seller test status. Request evidence of functional testing if the module is being sold as tested.
Bottom Line for Buyers
The Bosch Rexroth (0 608 750 125) is a legacy digital servo amplifier for EC motor control in Rexroth tightening-spindle systems. Its 220–330 VDC intermediate circuit, three-phase output, and motor-dependent current limits make it a configuration-specific replacement component.
For procurement, match the exact order number and verify the BT356/SB356 installation, SE control unit, supply module, and spindle configuration. A similar-looking Rexroth amplifier is not sufficient evidence of compatibility.
