{"product_id":"mitsubishi-electric-mr-j4-70a-melservo-j4-series-1-axis-servo-amplifier","title":"Mitsubishi Electric MR-J4-70A MELSERVO-J4 Series 1-Axis Servo Amplifier","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  Optimizing dynamic positioning trajectories in automated systems, the \u003cstrong\u003eMitsubishi Electric MR-J4-70A\u003c\/strong\u003e operates as a 1-axis servo amplifier within the \u003cstrong\u003eMELSERVO-J4\u003c\/strong\u003e product range. Engineered for \u003cstrong\u003e200V class\u003c\/strong\u003e systems, this drive outputs a continuous rated current of \u003cstrong\u003e5.8 A\u003c\/strong\u003e to drive \u003cstrong\u003e0.75 kW\u003c\/strong\u003e rotary servo motors with deterministic execution. By executing sinusoidal wave PWM control alongside 22-bit high-resolution feedback systems, the module maintains micro-precision tracking loop speeds. The hardware is equipped with built-in \u003cstrong\u003eSafe Torque Off (STO)\u003c\/strong\u003e safety networks certified to SIL 3 \/ PL e, providing physical energy cut-offs to prevent unauthorized motor restarts during maintenance windows.\n\u003c\/p\u003e\n\n\u003ch3\u003eKey Technical Features\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eAdvanced Control Loop:\u003c\/strong\u003e Sinusoidal wave PWM control and high-accuracy current control system for optimal torque response.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eHigh-Resolution Feedback:\u003c\/strong\u003e Evaluates 22-bit encoder signals directly, translating to 4,194,304 pulses per revolution for micro-stepping alignment.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eMulti-Drop Communication:\u003c\/strong\u003e Built-in RS-422 and RS-485 interfaces support multi-drop architecture linking up to 32 axes in a serial line.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eIntegrated Safety:\u003c\/strong\u003e Features hardware-implemented Safe Torque Off (STO) compliant with EN ISO 13849-1 Category 3 PL e and IEC 61508 SIL 3.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003e\n\u003cstrong\u003eRegenerative Capabilities:\u003c\/strong\u003e Equipped with a built-in 20W regenerative resistor to handle decelerating motor inertia.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eHigh-speed packaging, sealing, and continuous film-feeding machinery.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eMulti-axis pick-and-place gantry robots and material handling lines.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003ePrecision semiconductor wafer processing and sorting systems.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem;\"\u003eCNC machining tool changers and index tables.\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0; color: #1a365d;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eModel Code\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMR-J4-70A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eSeries Name\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eMELSERVO-J4 Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eMain Circuit Power Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eThree-phase or single-phase AC 200 V to 240 V, 50\/60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eAllowable Voltage Fluctuation\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAC 170 V to 264 V\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eMotor Rated Output\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0.75 kW\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eRated Output Current\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e5.8 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eControl Method\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSinusoidal wave PWM control and current control system\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eFeedback Resolution\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e22-bit (4,194,304 pulses\/rev)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eBuilt-in Regenerative Resistor\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e20 W\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eSafety Certification\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eEN ISO 13849-1 Category 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eIngress Protection Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eIP20 (open structure)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eOperating Temperature Range\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e0 to 55 degC (non-freezing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eVibration Resistance\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e5.9 m\/s2, 10 Hz to 55 Hz (X, Y, Z directions)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eNet Unit Weight\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e1.4 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e3.5 kg\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #e2e8f0;\"\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; border-right: 1px solid #e2e8f0; color: #1a365d;\"\u003eConnector Port\u003c\/th\u003e\n        \u003cth style=\"padding: 0.75rem; text-align: left; font-weight: bold; color: #1a365d;\"\u003eFunction \/ Signal Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eCN1\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eAnalog command interface \/ General-Purpose I\/O signals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eCN2\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eEncoder feedback connection (high-speed serial interface)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eCN3\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eRS-422 \/ RS-485 serial communication port\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eCN5\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eUSB port for PC setup software (MR Configurator2)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; border-right: 1px solid #e2e8f0; font-weight: bold;\"\u003eCN8\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eSafe Torque Off (STO) input \/ Safety signal connection\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\n\u003ch3\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  The MR-J4-70A includes integrated MR-J3 compatibility parameters, allowing direct electrical substitution of older MR-J3-70A units in most positioning setups. However, when retrofitting legacy panels, note that the physical footprint and mounting hole locations differ slightly; always verify sheet metal mounting templates prior to structural installation.\n\u003c\/p\u003e\n\n\u003ch3\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  While equipped with a built-in 20W regenerative resistor, high-duty-cycle vertical axis applications or large inertial loads can trigger \"AL 30\" (Regenerative Error) codes. To prevent operational shutdowns, calculate the cumulative kinetic energy feedback and consider wiring an external heavy-duty regenerative resistor across the P+ and C terminals, while updating parameter Pr. PA02 to indicate external power dispersion.\n\u003c\/p\u003e\n\n\u003ch3\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1.5rem;\"\u003e\n  Ensure the CN8 safety jumper plug is inserted if the Safe Torque Off (STO) function is not wired to an external safety relay. Removing the plug or leaving the STO circuit open will generate an \"AL 9F\" (Safety Stop) system inhibit, preventing motor excitation. Always isolate control-signal cables (CN1\/CN2) from the motor power line (U\/V\/W) by at least 30 cm to eliminate parasitic electromagnetic interference.\n\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 Verify that all AC main line feeds are fully de-energized. Allow a minimum of 15 minutes after power-down for internal DC bus capacitors to discharge to safe levels. Verify the bus voltage across terminals P+ and N- is under 20V DC using a certified digital multimeter before making any wiring physical contact.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e1\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003e\n    Mount the amplifier vertically on an unpainted, conductive metallic backplate to ensure solid chassis grounding and maximum passive heat convection.\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e2\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003e\n    Maintain at least 10 mm clearance on both sides and 40 mm clearance above and below the amplifier to prevent thermal accumulation inside enclosed panels.\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e3\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003e\n    Ensure all power terminal block screws are torqued to the OEM specification of 1.2 N-m to minimize contact resistance.\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem; flex-shrink: 0;\"\u003e4\u003c\/div\u003e\n  \u003cdiv style=\"color: #2d3748;\"\u003e\n    Perform a continuity test on the grounding terminal (PE) prior to applying control and main circuit power.\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102243021163,"sku":"MR-J4-70A","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/MR-J4-70A-tet2qkjyupd.png?v=1776137886","url":"https:\/\/www.plcprotech.com\/fa\/products\/mitsubishi-electric-mr-j4-70a-melservo-j4-series-1-axis-servo-amplifier","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}