Yaskawa SGDH-01AEY901 Replacement for Sigma-II Series

Product Overview

Yaskawa SGDH-01AEY901 Replacement for Sigma-II Series: Smooth Transition & Legacy System Compatibility

The Yaskawa SGDH-01AEY901 is a 100W AC servo amplifier from the Sigma-II series, widely deployed in precision motion control applications across CNC machining centers, semiconductor handling equipment, packaging lines, and general-purpose industrial automation. As the Sigma-II platform approaches end-of-life and spare parts become increasingly scarce, many facilities are now planning structured migration paths to maintain uptime and protect their capital investment in existing control architectures.

TOPNLMS stocks verified SGDH-01AEY901 units and compatible Sigma-II replacement amplifiers, enabling direct drop-in substitution or guided upgrade to the Sigma-7 platform. Whether your priority is a like-for-like swap to restore a downed axis or a phased modernization of your servo system, our technical team supports both approaches with pre-shipment testing, wiring documentation, and parameter backup guidance.

The SGDH-01AEY901 operates on single-phase 200–230 VAC input and delivers 100W continuous output power, making it suitable for compact servo axes where space in the control cabinet is limited. Its MECHATROLINK-II communication interface is compatible with Yaskawa MP-series machine controllers, including the MP2300 and MP2600, as well as third-party motion controllers that support the MECHATROLINK-II protocol. When replacing a failed unit, the existing MECHATROLINK-II wiring harness and CN1 I/O connector can typically be reused without modification, significantly reducing field labor time.

For sites migrating from older SGDB-series or SGDA-series amplifiers to the SGDH platform, the physical footprint and DIN-rail or panel-mount dimensions are compatible with standard 35mm rail installations. The CN1 50-pin I/O connector pinout follows the Sigma-II standard, and parameter settings from a functioning SGDH unit can be cloned using the Yaskawa JUSP-OP05A-1 digital operator or the SigmaWin+ PC software, minimizing re-commissioning time on the machine.

In multi-axis systems, the SGDH-01AEY901 is commonly paired with the SGMAH-01AAA41 or SGMAH-01A1A41 servo motors, which share the same 100W power class and encoder interface. The incremental encoder feedback cable (JZSP-CMP00-03 or equivalent) connects directly to the CN2 port without adapter, preserving the existing cable routing in the machine. For applications requiring absolute position retention across power cycles, the SGDH series supports the optional JUSP-NS115 absolute encoder backup unit, which can be retrofitted to existing installations.

When the upgrade path leads to the Sigma-7 platform, the SGDV-R70A01A or SGDV-R90A01A amplifiers offer backward-compatible motor wiring for SGMAH-series motors through Yaskawa’s published conversion tables. The Sigma-7 amplifiers introduce EtherCAT and MECHATROLINK-III communication options, enabling integration with modern Sysmac NJ/NX controllers or Siemens S7-1500 systems via gateway modules. The SGDV series also supports Safety over EtherCAT (FSoE), which is increasingly required in new machinery directives.

For facilities operating Yaskawa MP2300S or MP3300 machine controllers, the transition from MECHATROLINK-II to MECHATROLINK-III is supported by the SGDV amplifier’s dual-protocol capability, allowing a phased axis-by-axis migration without replacing the controller in the first phase. This approach reduces project risk and allows production to continue on unaffected axes during the upgrade window.

Power supply compatibility is an important consideration during replacement. The SGDH-01AEY901 draws from a single-phase 200V supply, and the control power (24 VDC) is derived internally. In control cabinets where the 24V rail is shared with PLCs such as the Yaskawa CP-9200SH or third-party controllers, verifying the 24V supply capacity before adding replacement amplifiers is recommended. The SGDH series does not require an external regenerative resistor at 100W, but if the application involves frequent deceleration cycles, confirming the built-in regenerative capacity against the load inertia ratio is advisable.

TOPNLMS ships SGDH-01AEY901 units from Xiamen with full pre-shipment functional testing, including power-on verification, alarm code check, and encoder interface continuity. Each unit is packed in anti-static foam with original or equivalent protective packaging. Standard lead time is 3–7 business days for in-stock units, with express DHL/FedEx options available for urgent downtime recovery. All units are covered by a 12-month warranty from the date of shipment.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful SGDH-01AEY901 replacement or Sigma-II system migration typically involves coordinating several interdependent components. The servo motor — most commonly an SGMAH-01AAA41 or SGMAH-01A1A41 — must be verified for encoder type compatibility before swapping the amplifier, as mixing incremental and absolute encoder variants requires parameter changes and potentially a battery backup module. The encoder feedback cable (JZSP-CMP00-03 or equivalent 3-meter standard) should be inspected for connector condition and replaced if the insulation shows heat or abrasion damage from years of service near the motor.

On the controller side, the Yaskawa MP2300 or MP2300S machine controller communicates with the SGDH amplifier via MECHATROLINK-II, and the SVB-01 motion module within the MP2300 manages axis registration. When replacing an amplifier, the axis parameters stored in the SVB-01 module — including electronic gear ratio, position loop gain, and speed feedforward — should be documented before the swap and restored afterward to avoid re-tuning the servo loop from scratch.

For facilities that also need to replace the I/O interface layer, the Yaskawa JEPMC-IO350 remote I/O module provides MECHATROLINK-II compatible digital I/O expansion, allowing the existing field wiring to remain intact while the control architecture is updated. In applications where signal isolation between the servo drive and the PLC I/O is required, a DIN-rail mounted signal isolator (such as a Phoenix Contact MINI MCR series) can be inserted in the CN1 analog reference or enable signal lines without modifying the existing cable harness.

Power distribution within the control cabinet should also be reviewed during a servo replacement. The SGDH-01AEY901 shares its 200V AC supply rail with other drives in multi-axis cabinets, and a noise filter (such as the Yaskawa LNFD-10 or equivalent IEC-rated EMC filter) on the AC input line is recommended to prevent conducted interference from affecting neighboring PLCs or HMI panels. If the cabinet also houses a Yaskawa VARISPEED or V1000 series VFD for spindle or conveyor control, ensuring adequate separation of the servo and VFD power rails reduces the risk of ground loop interference during commissioning.

Finally, for sites that require a programming cable to access the SGDH amplifier’s serial port for parameter backup or alarm history retrieval, the JZSP-CVS06-02 USB-to-serial cable with SigmaWin+ software provides a straightforward connection from a Windows laptop to the amplifier’s CN3 port, enabling full parameter upload/download without removing the unit from the cabinet.

Retrofit Guidance FAQ

Q: Can I reuse the existing CN1 wiring when replacing a failed SGDH-01AEY901 with a new unit?
A: Yes. The CN1 50-pin connector pinout is standardized across the Sigma-II SGDH series. A direct replacement unit will accept the existing harness without rewiring, provided the connector shell and pins are in good condition.

Q: Do I need to re-tune the servo after replacing the amplifier?
A: If the replacement unit is the same model (SGDH-01AEY901) and the motor is unchanged, restoring the parameter file from SigmaWin+ or the JUSP-OP05A-1 operator will recover the original tuning. Minor gain adjustments may be needed if the replacement unit has a different firmware revision.

Q: Is the SGDH-01AEY901 compatible with MECHATROLINK-I controllers?
A: No. The SGDH-01AEY901 with the Y901 option code supports MECHATROLINK-II only. MECHATROLINK-I systems require the earlier SGDB-series amplifiers or a protocol gateway.

Q: What is the physical clearance requirement for the SGDH-01AEY901 in the control cabinet?
A: Yaskawa specifies a minimum 30mm clearance above and below the amplifier for airflow, and 10mm side clearance between adjacent drives. The unit dimensions are approximately 50mm (W) × 168mm (H) × 162mm (D).

Q: Can the SGDH-01AEY901 be used with a Siemens S7-300 PLC?
A: The SGDH-01AEY901 communicates via MECHATROLINK-II, which is not natively supported by Siemens S7-300. Integration requires a MECHATROLINK-II gateway module or use of the amplifier’s analog speed/torque reference input (CN1 pins) with the S7-300’s analog output module.

Q: How do I verify the unit is genuine before installation?
A: TOPNLMS provides the serial number and manufacturing date code for each unit prior to shipment. Customers can verify authenticity via Yaskawa’s regional service center using the serial number on the nameplate.

Warranty Assurance

Every SGDH-01AEY901 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of shipment. Pre-shipment testing includes power-on functional verification, alarm code check (no active faults), encoder interface continuity test, and visual inspection of the PCB, capacitors, and connector contacts. Units that do not pass all test criteria are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Customers are asked to provide the order number, unit serial number, and a brief description of the fault symptom. Our after-sales team responds to warranty inquiries within 1 business day. Return shipping for confirmed warranty defects is covered by TOPNLMS for orders above USD 500.

For procurement teams requiring documentation, we can provide a test report, packing list, and commercial invoice with HS code declaration for customs clearance. Lead time for in-stock units is 3–7 business days; express shipment via DHL or FedEx is available for urgent downtime recovery scenarios.

We understand that unplanned servo drive failures carry significant production cost implications. Our inventory policy maintains buffer stock of high-demand Sigma-II models specifically to support emergency replacement orders with same-day dispatch where possible.