REXROTH EcoDrive Cs series AC servo drive system

REXROTH EcoDrive Cs series AC servo drive system

The REXROTH EcoDrive Cs series AC servo drive system is a low-power drive solution covering a power range of 100~750 W. It includes a DKC series drive controller (supporting multiple buses such as PROFIBUS DP/CANopen) and an MSM series servo motor (IP65 protection, optional brake/absolute encoder), suitable for single/three-phase power supply of 200~240 V, supporting position/speed closed-loop control, with IP20 (controller)/IP65 (motor) protection level, suitable for industrial scenarios such as handling, packaging, and machine tools. The system needs to be built with dedicated cables and accessories, and installation and commissioning must comply with EMC and safety regulations.

Product Overview

System composition: EcoDrive Cs is a low-power AC servo drive system launched by Bosch Rexroth, consisting of DKC series drive controller and MSM series permanent magnet synchronous servo motor, matched with dedicated cables, braking resistors, encoders and other accessories, forming a complete drive solution.

Core positioning: Targeting power requirements of 100~750 W, suitable for single axis or multi axis industrial equipment, achieving precise position and speed closed-loop control, it is the core driving component for handling, packaging, machine tools and other scenarios.

Core strengths

Bus compatibility: Supports various industrial buses such as PROFIBUS DP, CANopen, DeviceNet, SERCOS, etc., and is compatible with multiple brands of control systems.

Flexible configuration: The motor can be equipped with optional brake, incremental/absolute encoder, optical axis/key axis, and the controller supports expansion modules.

Safe and reliable: Complies with EN 50178 safety standards, with overvoltage, overload, emergency stop protection, and leakage current protection.

Easy installation: The controller supports rail installation, the motor is compatible with multiple installation postures, and the cable is connected in a plug-in manner.

Core technical parameters

(1) Key parameters of drive controller (DKC series)

Specific indicators for parameter categories

Power range: 100 W (DKCxx. 3-004), 200 W (008), 400 W (012), 750 W (018)

Power supply specification single/three-phase AC 200~240 V (± 10%/-15%), frequency 50/60 Hz

Continuous output current of 1.0~4.3 A, peak value of 3.0~12.9 A (400ms)

Control interface analog (± 10V/4-20mA), digital I/O (7-in, 3-out), encoder interface (incremental/absolute)

Protection level IP20 (installed inside the control cabinet)

Environmental conditions: working temperature of 0-40 ℃, storage temperature of -20~80 ℃, relative humidity ≤ 90% (no condensation)

Size, weight, weight 1.4~2.1 kg, length 70~170 mm (depending on model)

(2) Key parameters of servo motor (MSM series)

Model, Power, Continuous Torque, Peak Torque, Rated Speed, Maximum Speed, Moment of Inertia (kg · m ²), Weight (kg)

MSM020B 100W 0.3 Nm 0.95 Nm 3000 min ⁻¹ 5000 min ⁻¹ 0.032 × 10 ⁻⁴ 0.5 (0.7 with brake)

MSM030B 200W 0.64 Nm 1.91 Nm 3000 min ⁻¹ 5000 min ⁻¹ 0.1 × 10 ⁻⁴ 0.96 (1.36 with brake)

MSM030C 400W 1.2 Nm 3.8 Nm 3000 min ⁻¹ 5000 min ⁻¹ 0.17 × 10 ⁻⁴ 1.5 (1.9 with brake)

MSM040B 750W 2.4 Nm 7.1 Nm 3000 min ⁻¹ 4500 min ⁻¹ 0.67 × 10 ⁻⁴ 3.1 (3.8 with brake)

Common parameters --

Protection level - IP65 (enclosure), IP40 (output shaft)

Insulation level - Class B (up to 130 ℃)

Encoder - Incremental (10000 resolution), Absolute Value (17 bit single loop+16 bit multi loop)

Core configuration and selection

Controller classification and interface

Basic type (DKC10.3): No bus module, supports digital I/O control.

Bus type (DKC03.3/05.3/06.3): Supports PROFIBUS DP, CANopen, and DeviceNet respectively.

SERCOS type (DKC02.3): Fiber optic interface, switchable transmission power, maximum transmission 500m (glass fiber).

Analog/Parallel (DKC01.3): Supports ± 10V/4-20mA instructions, encoder simulation output.

Optional motor configuration

Encoder: incremental (relative position), absolute value (absolute position, battery backup required).

Axis type: optical axis (friction locking connection), key shaft (DIN 6885 standard).

Brake: 24VDC electric release type, brake torque 0.29~2.45 Nm, used for vertical axis anti fall.

List of Key Accessories

|Accessory type | Model example | Purpose|

|Motor cable | IKG0331 | Controller and motor power connection|

|Encoder cable | IKS0230 | Encoder signal transmission|

|Braking resistor | EBR01-0100-100R-V-D | Absorbs regenerative energy to avoid overvoltage|

|NTC Thermistor | SUP-E05-DCCS-SURGEP | Reduce Starting Impulse Current|

|Encoder adapter | SUP-E04-DKCCS-ENCODR | 1Vess encoder adapter|

Installation and wiring specifications

Controller installation requirements

Installation method: 35mm standard top cap guide rail, vertically installed (utilizing natural convection heat dissipation).

Space requirement: Reserve a heat dissipation gap of ≥ 40mm around the perimeter to avoid close placement with power electronic components.

Fixed torque: The installation screw torque is matched according to the model (such as using M4 screws for DKC02.3, with a torque of 3.1 Nm).

Core wiring specifications

Power wiring: Single/three-phase power supply needs to match the voltage range, with a PE wire cross-section of ≥ 10 mm ² and a grounding resistance of ≤ 4 Ω.

Cable selection: The cross-sectional area of the power cable should be ≥ 0.75 mm ², and the encoder cable should be double shielded with a distance of ≥ 100mm from the power cable.

Bus wiring: A 121 Ω terminal resistor is required to be connected at both ends of the PROFIBUS DP bus, and the CANopen bus supports addresses 1-127.

EMC compliance requirements

Cable shielding: The shielding layer of power cables is grounded at one end, and the shielding layer of signal cables is grounded at both ends.

Filter configuration: A dedicated power filter (such as NFE01.1) needs to be installed to suppress electromagnetic interference.

Debugging and maintenance

Debugging process

Hardware connection: Use RS232 cable (IKB0041) to connect the PC and controller, and check the wiring before powering on.

Software configuration: Set motor parameters, control mode, and bus address through DriveTop software.

Trial operation: First test the speed/steering with no load, then verify the position accuracy with load, and confirm that the emergency stop function is effective.

routine maintenance

Motor maintenance: bearings are maintenance free (with a lifespan of 30000 hours), and the brake is activated for rust prevention every 48 hours.

Encoder maintenance: The battery life of the absolute value encoder is about 5 years, and it needs to be replaced with load to avoid position loss.

Controller maintenance: Check the wiring tightness annually, clean the dust on the heat sink, and avoid overload operation.

Fault handling

Diagnosis display: The H1 indicator light displays an error code, and the S1 button can reset non fatal errors.

Common faults: overvoltage (check brake resistance), overload (reduce load or prolong acceleration time), communication failure (check bus parameters).

Application scenarios and limitations

Applicable scenarios

Industrial equipment: handling and assembly systems, packaging and food machinery, printing machines, small machine tools.

Control requirements: Low power loads that require precise position/speed control, for single or multi axis synchronous applications.

Usage restrictions

Prohibited for use in personnel transportation equipment, medical equipment, and explosion-proof environments (non explosion-proof models).

If it exceeds the ambient temperature (0-40 ℃) or altitude (>1000m), it needs to be downgraded for use (2% for every 1 ℃ increase).

If the power supply voltage exceeds the range of 200~240V, an autotransformer (such as DST series) should be configured.