Yaskawa YPHT11014-1A Replacement for Sigma Series

Product Overview

Yaskawa YPHT11014-1A Replacement for Sigma Series: Smooth Transition from Legacy Servo Systems

The Yaskawa YPHT11014-1A is a servo drive control PCB engineered for the Sigma Series servo amplifier platform. As legacy Sigma I and Sigma II servo systems approach end-of-life or encounter discontinued spare part shortages, the YPHT11014-1A serves as a direct-fit replacement board that restores full drive functionality without requiring a complete servo amplifier replacement. For maintenance engineers and procurement teams managing aging servo infrastructure, sourcing a verified YPHT11014-1A control board is often the fastest and most cost-effective path to restoring machine uptime.

This control PCB governs the core signal processing, feedback loop management, and communication interface functions within the Sigma Series servo amplifier. When the original board fails due to capacitor degradation, power surge damage, or component aging, a like-for-like board swap eliminates the need to re-engineer the servo loop parameters from scratch. The YPHT11014-1A retains the same connector layout, mounting hole pattern, and firmware interface as the original, allowing technicians to complete the replacement within a standard maintenance window.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful YPHT11014-1A board replacement is rarely a standalone task — it typically occurs within a broader servo system maintenance or modernization project. During the board swap process, technicians commonly inspect and, where necessary, replace adjacent components to ensure the restored amplifier performs reliably over the next service cycle.

The servo amplifier’s power section, including the IGBT gate driver board and the DC bus capacitor bank, should be evaluated at the same time as the control PCB. In many Sigma Series amplifiers, the JUSP-OP05A-1 digital operator panel provides the primary interface for re-entering servo parameters after a board replacement, and having a functional operator panel on hand accelerates commissioning. For systems using the CN1 I/O connector to interface with a host PLC — such as a Yaskawa MP2300 machine controller or a Mitsubishi Q-series PLC — verifying the I/O signal wiring integrity before powering up the replaced board prevents nuisance faults.

Encoder cable assemblies connecting the SGMAH or SGMPH series servo motors to the amplifier should be inspected for insulation damage, particularly at cable entry points and drag-chain segments. A degraded encoder cable can generate false feedback errors that mimic control board faults, so replacing the cable alongside the YPHT11014-1A board eliminates ambiguity during post-repair verification. The JZSP-CMP00-03 encoder cable is a commonly stocked item for Sigma II motor-amplifier pairs.

For facilities upgrading from Sigma I to Sigma II or planning a forward migration toward the Sigma-7 platform (SGDV or SGDH series amplifiers), the YPHT11014-1A board replacement can serve as an interim measure that extends the operational life of existing servo axes while the broader migration is planned. In such projects, the SigmaWin+ engineering software is indispensable for parameter backup, autotuning, and drive commissioning across both legacy and current-generation amplifiers.

Control cabinet integrators working on panel retrofits often pair the servo amplifier repair with a review of the 24VDC control power supply, terminal block wiring, and EMC filter integrity. Replacing a faulty YPHT11014-1A board in a cabinet that also has a marginal power supply or loose terminal connections risks a repeat failure, so a systematic inspection of the OMRON S8VS or similar DIN-rail power supply feeding the control circuit is recommended practice.

Retrofit Guidance FAQ

Q: Do I need to rewire the servo amplifier after replacing the YPHT11014-1A board?
A: No. The YPHT11014-1A uses the same connector layout and pinout as the original board. All existing wiring — including the CN1 I/O connector, CN2 encoder connector, and power terminals — remains in place. No rewiring is required.

Q: Will I need to re-enter servo parameters after the board swap?
A: Yes. Servo parameters stored in the original board’s non-volatile memory are not transferred automatically. Before removing the faulty board, back up all parameters using SigmaWin+ or record them manually from the digital operator. After installing the YPHT11014-1A, re-enter the parameters and perform a JOG test before returning the axis to production.

Q: Is the YPHT11014-1A compatible with both Sigma I and Sigma II amplifiers?
A: The YPHT11014-1A is designed for specific Sigma Series amplifier models. Please confirm your amplifier model number (e.g., SGDA, SGDB, or SGDH prefix) before ordering to ensure board-level compatibility. Contact us with your amplifier nameplate data for confirmation.

Q: What communication protocols does this board support?
A: The Sigma Series control PCB supports analog velocity/torque command inputs and pulse-train position command inputs (sign + pulse or 90° phase difference). It does not natively support MECHATROLINK-II or EtherCAT — those protocols are associated with later Sigma-5 and Sigma-7 generation amplifiers.

Q: How much physical space does the replacement board require?
A: The YPHT11014-1A is a direct-fit replacement with identical PCB dimensions and mounting hole positions. No modifications to the amplifier chassis or control cabinet are required.

Q: Can this board be used in a multi-axis servo system?
A: Yes. Each servo amplifier in a multi-axis system has its own control PCB. Replacing the YPHT11014-1A in one amplifier does not affect adjacent axes. Ensure the host controller (e.g., Yaskawa MP2300, Fanuc 0i, or Mitsubishi Q172DCPU) continues to receive correct feedback from the repaired axis before resuming coordinated motion.

Warranty Assurance

Every YPHT11014-1A servo drive control PCB supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each board undergoes functional verification including visual inspection, component-level checks, and power-on testing where applicable. This pre-shipment inspection process is designed to identify latent defects before the board reaches your facility, reducing the risk of a failed installation.

In the event that a board is found to be defective on arrival or fails within the warranty period under normal operating conditions, TOPNLMS will provide a replacement unit or issue a refund in accordance with our standard after-sales policy. Our technical support team is available to assist with installation queries, parameter configuration guidance, and fault diagnosis during the warranty period.

For procurement teams managing critical spare parts inventories, we offer stock reservation and batch sourcing options. Lead times, stock availability, and pricing are confirmed at the time of inquiry. We ship globally from Xiamen, China, with standard export documentation including commercial invoice, packing list, and certificate of origin available upon request.

To place an order or request a compatibility confirmation, contact us at [email protected] or call +86 18359293191.