Name: DR1B-02AC
Brand: Yaskawa
Price: 740 EUR

Description

The Yaskawa SGDM-15DN is an AC servo amplifier of the Sigma-II series for 400 V servo applications in the power range up to 1.5 kW. The SGDM series is technically based on the SGDH platform, meaning that alarms and troubleshooting are fully compatible with the SGDH series. The device is designed for precise axis control, high dynamics, and reliable continuous operation in industrial automation environments.

Overview

Device category: AC Servo Amplifier (Servopack)
Series/Class: Sigma-II (SGDM), 400 V class
Power rating: 1.5 kW
Design: compact, forced-air cooled, IP1X

Model Designation

SGDM = Yaskawa Sigma-II Servopack (Compact Series)
15 = Power level 1.5 kW
D = 400 V class
N = Interface/Version variant

Technical Data

Feature	Value
Manufacturer	Yaskawa Electric Corporation
Input voltage	3 Ph 380–480 V AC, 50/60 Hz
Input current	4.8 A
Output voltage	3 Ph 0–480 V AC, 0–300 Hz
Output current	5.4 A
Output power	1.5 kW
Ambient temperature	0–55 °C
Cooling	Forced ventilation
Protection class	IP1X
Weight / Dimensions	n. a.

Connections & Interfaces

L1 / L2 / L3 – 3-phase mains input 380–480 V
U / V / W – Motor outputs
B1 / B2 / B3 – Brake resistor / Regeneration
CN1 – Control and I/O interface (24 V DC)
CN2 – Encoder connection
CN3 – RS-232C / Parameter setting (SigmaWin+)
LED display – Status and alarm codes

Control Board / Assemblies

Assembly	Description	Quantity
Control board	Control, logic, and communication	1
Power board	Output stage for 400 V power class	1
DC link	Capacitors / Energy buffer	1
Power section	Compact power section with heat sink	1

Alarms & Troubleshooting

Code	Designation	Typical Finding	Check	Remedy
A.02	Parameter Breakdown	EEPROM data faulty	Initialization (Fn005)	Reload parameters
A.05	Combination Error	Motor/Drive incompatible	Check motor type	Use suitable motor
A.10	Overcurrent / Overheat	Overcurrent or overtemperature	Check U/V/W, load	Check power section
A.30	Regeneration Error	Error in the regeneration path	Check RB circuit	Repair drive
A.32	Regenerative Overload	Regeneration too high	Check load profile	Reduce load
A.40	Overvoltage	DC link voltage too high	Measure mains voltage	Check supply
A.41	Undervoltage	Supply too low	Check input	Stabilize mains
A.51	Overspeed	Encoder or phase error	Check encoder	Correct wiring
A.71	Overload 1	Short-term overload	Check current curve	Check mechanics
A.C9	Encoder Comm Error	Encoder communication disturbed	Check cable / shielding	Replace cable

Typical Applications

CNC axes in the 400 V power range up to 1.5 kW
Automation and handling systems
Positioning axes with higher DC link voltage
Special machinery and industrial manufacturing

Service Notes

Save parameters before servicing
Regularly check encoder and motor cables
Keep fans and cooling channels clean
No insulation measurement (Megger) while installed
Always check mechanics and ramps in case of overcurrent or regeneration alarms

Repair Description

Input check: Visual inspection, measurement of mains and DC link voltage, short-circuit test on U/V/W
Disassembly & Cleaning: Opening the housing, cleaning the boards, checking the cooling surfaces
Analysis: Checking the power stage, capacitors, current measurement, and control logic
Repair: Replacement of defective power components and aged components
Testing & Load Test: Test run with reference motor, monitoring current and temperature
Long-term Test & Completion: Continuous operation under load, documentation of measurement results

Repair for Yaskawa DR1B-02AC

Servopack