{"product_id":"mitsubishi-electric-mr-j4w2-77b-melservo-j4-series-2-axis-digital-ac-servo-amplifier","title":"Mitsubishi Electric MR-J4W2-77B MELSERVO-J4 Series 2-Axis Digital AC-Servo Amplifier","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eDesigned for highly synchronized multi-axis motion control, the Mitsubishi Electric MR-J4W2-77B functions as a high-density, 2-axis AC servo amplifier operating within the MELSERVO-J4 platform. By integrating control circuitry for two independent axes into a single physical unit, this amplifier significantly reduces required electrical panel enclosure footprint and streamlines control bus wiring. It communicates natively via the high-speed \u003cstrong\u003eSSCNET III\/H\u003c\/strong\u003e fiber-optic network, enabling real-time, deterministic motion synchronization with motion controllers and Simple Motion modules. The drive features advanced \u003cstrong\u003evibration suppression control II\u003c\/strong\u003e and real-time auto-tuning algorithms to optimize mechanical dynamic response and settle times.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 20px;\"\u003e\n  \u003cli\u003eDual-axis integration reduces panel layout space requirements compared to two single-axis drives.\u003c\/li\u003e\n  \u003cli\u003eSSCNET III\/H optical fiber communication interface delivers high noise immunity and 150 Mbps response rates.\u003c\/li\u003e\n  \u003cli\u003eCompatible with high-resolution rotary and linear motors utilizing 22-bit absolute encoders.\u003c\/li\u003e\n  \u003cli\u003eIntegrated Safe Torque Off (STO) function complying with EN ISO 13849-1 Category 3 PL e.\u003c\/li\u003e\n  \u003cli\u003eReal-time adaptive tuning automatically compensates for varying load inertia and mechanical resonance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 20px;\"\u003e\n  \u003cli\u003eSynchronized pick-and-place gantry robots and multi-axis Cartesian systems.\u003c\/li\u003e\n  \u003cli\u003eHigh-speed industrial packaging, filling, and wrapping machinery.\u003c\/li\u003e\n  \u003cli\u003ePrecision electronic component insertion and semiconductor assembly lines.\u003c\/li\u003e\n  \u003cli\u003eAutomated material handling conveyor feeds and auxiliary machine tool axes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border-bottom: 2px solid #2b6cb0; text-align: left; padding: 8px;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"border-bottom: 2px solid #2b6cb0; text-align: left; padding: 8px;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eMR-J4W2-77B\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eMELSERVO-J4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eNumber of Controlled Axes\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e2 Axes (Axis A and Axis B)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eRated Output (Per Axis)\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e0.75 kW (Axis A) \/ 0.75 kW (Axis B)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eMain Circuit Power Input\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e3-phase 200 to 240 V AC, 50\/60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eControl Circuit Power Input\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e1-phase 200 to 240 V AC, 50\/60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCommunication Interface\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eSSCNET III\/H (High-speed optical network)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eControl Method\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eSinusoidal PWM control, current systematic control\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eSafety Function\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eSafe Torque Off (STO) via CN8\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eAmbient Operating Temp.\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e0 to 55 degC (non-freezing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eProduct Dimensions\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e168 mm (H) x 85 mm (W) x 195 mm (D)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eProduct Net Weight\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e2.3 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e3.0 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003e250 mm x 150 mm x 220 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eJapan\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border-bottom: 2px solid #2b6cb0; text-align: left; padding: 8px;\"\u003eConnector\/Terminal\u003c\/th\u003e\n        \u003cth style=\"border-bottom: 2px solid #2b6cb0; text-align: left; padding: 8px;\"\u003eFunctional Allocation\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCN1A \/ CN1B\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eSSCNET III\/H Optical network input\/output lines\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCN2A \/ CN2B\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eEncoder communication interface (Axis A \/ Axis B)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCN3\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eI\/O signal connector (External limit switches, proximity sensors)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eCN8\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eSafe Torque Off (STO) functional circuit connector\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eL1 \/ L2 \/ L3\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eMain circuit three-phase AC power input terminal block\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eL11 \/ L21\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eControl circuit single-phase AC power input terminal block\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left; font-weight: bold;\"\u003eU \/ V \/ W (A \u0026amp; B)\u003c\/td\u003e\n        \u003ctd style=\"border-bottom: 1px solid #e2e8f0; padding: 8px; text-align: left;\"\u003eAC Servo motor power output lines for Axis A and Axis B\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch3 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eWhen replacing older MR-J3W series multi-axis drives, please note that physical dimensions and parameter formatting differ. The MR-J4W2-77B requires MR-J4 mode configuration parameters and firmware compatibility with the upstream controller (such as Q-series Motion Controllers or Simple Motion Modules). When migrating existing systems, ensure that SSCNET III\/H network configuration tools are updated to support the MR-J4 model profiles.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eIn enclosed panels with limited airflow, the MR-J4W2-77B can experience rapid internal thermal rise. Operating both 0.75 kW axes at high continuous duty cycles simultaneously can trigger a thermal overload alarm (AL 46). Maintaining a 40 mm vertical clearance above\/below and a 10 mm lateral clearance is mandatory. If both axes decelerate concurrently under heavy inertial load, verify that the regenerative power does not exceed the internal resistor capacity; install a properly sized external regenerative resistor to prevent overvoltage faults (AL 33).\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eAlways use original Mitsubishi MR-CCN1-type optical cables for the CN1A\/CN1B ports. Standard fiber-optic cables have a strict minimum bend radius of 25 mm; violating this threshold will lead to optical attenuation, inducing erratic communication dropouts (AL 86.1). Ensure encoder cables (CN2A\/CN2B) are physically routed in separate, shielded cable trays away from the motor power cables (U\/V\/W) to prevent electromagnetic interference from triggering encoder communication errors (AL 1A).\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem; color: #9b2c2c;\"\u003e\n  \u003cstrong\u003eCRITICAL WARNING:\u003c\/strong\u003e Prior to undertaking physical installation or wiring changes, fully isolate the main and control circuit electrical power supplies. After power isolation, wait at least 15 minutes to allow internal high-voltage bus capacitors to discharge. Verify that the physical \"CHARGE\" LED on the front face of the amplifier is completely dark, and measure the residual DC bus voltage across terminals P+ and N- to verify it is below 45 V before handling terminals.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; margin-top: 2px;\"\u003e1\u003c\/span\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eMount the amplifier vertically on a flat, rigid metallic backplate using the mounting screws. Maintain standard clearance requirements to optimize cooling convection currents.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; margin-top: 2px;\"\u003e2\u003c\/span\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eConnect the dedicated functional grounding wire to the amplifier ground terminal and verify connection path back to the system ground busbar.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; min-width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 12px; margin-top: 2px;\"\u003e3\u003c\/span\u003e\n  \u003cp style=\"color: #2d3748; margin: 0;\"\u003eExecute control and encoder wiring, ensuring that the fiber-optic SSCNET connections are fully clicked into position in CN1A\/CN1B with the protective caps removed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102128562539,"sku":"MR-J4W2-77B","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/mr-j4w2-77b-5dcjk1j0g5a.png?v=1776137891","url":"https:\/\/www.plcprotech.com\/tr\/products\/mitsubishi-electric-mr-j4w2-77b-melservo-j4-series-2-axis-digital-ac-servo-amplifier","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}