{"product_id":"mitsubishi-electric-mr-j4-70b-melservo-j4-series-servo-amplifier","title":"Mitsubishi Electric MR-J4-70B MELSERVO-J4 Series Servo Amplifier","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nEngineered for high-performance motion control, the \u003cstrong\u003eMitsubishi Electric MR-J4-70B\u003c\/strong\u003e servo amplifier delivers precise position, speed, and torque control within the MELSERVO-J4 ecosystem. Running on an output capacity of \u003cstrong\u003e0.75 kW\u003c\/strong\u003e, this 200V class amplifier interfaces natively with motion controllers using the ultra-fast \u003cstrong\u003eSSCNET III\/H\u003c\/strong\u003e synchronous optical network, optimizing cycle times down to 0.222 ms. Its integrated \u003cstrong\u003eSafe Torque Off (STO)\u003c\/strong\u003e safety function and dynamic vibration suppression filters ensure machine protection and maximum mechanical throughput in demanding factory automation lines.\n\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"margin-left: 1.5rem; margin-bottom: 1.5rem; padding-left: 0;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003e\n\u003cstrong\u003eSSCNET III\/H Command Interface:\u003c\/strong\u003e Optical fiber networking allows high-speed, noise-immune communications with synchronization cycles of 0.222 ms, 0.444 ms, or 0.888 ms.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003e\n\u003cstrong\u003eBuilt-In Safety Functions:\u003c\/strong\u003e Features STO (Safe Torque Off) certified to EN ISO 13849-1 Category 3 PL e and IEC 61508 SIL 3 for rapid motor power de-energization.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003e\n\u003cstrong\u003eDynamic Tuning and Filters:\u003c\/strong\u003e Real-time auto-tuning paired with adaptive vibration suppression, robust filters, and lost motion compensation minimizes settling times and machine resonance.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003e\n\u003cstrong\u003eVersatile Power Configurations:\u003c\/strong\u003e Supports single-phase or three-phase input configurations from AC 200V to 240V.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"margin-left: 1.5rem; margin-bottom: 1.5rem; padding-left: 0;\"\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003eMulti-axis positioning systems and high-speed pick-and-place packaging machinery.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003ePrecision semiconductor handling platforms and rotary indexing tables.\u003c\/li\u003e\n  \u003cli style=\"margin-bottom: 0.5rem; list-style-type: square; color: #2d3748;\"\u003eAutomated continuous-path assembly lines requiring synchronized multi-drive networks.\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 style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; color: #1a365d; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; color: #1a365d; font-weight: bold;\"\u003eSpecification\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: 8px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMR-J4-70B\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eProduct Series\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMELSERVO-J4 Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOutput Rated Power\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e0.75 kW\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOutput Rated Voltage\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eThree-phase AC 170 V\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOutput Rated Current\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e5.8 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eMain Circuit Power Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eThree-phase or Single-phase AC 200 V to 240 V, 50 Hz \/ 60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eMain Circuit Rated Current\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e3.8 A\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eControl Circuit Power Input\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSingle-phase AC 200 V to 240 V, 50 Hz \/ 60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eControl Circuit Current \u0026amp; Power\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e0.2 A \/ 30 W\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCommand Interface\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSSCNET III\/H Interface\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eControl Method\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSine wave PWM control, current control system\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eBuilt-in Regenerative Resistor\u003c\/td\u003e\n        \u003ctd style=\"padding: 20px 8px 8px 8px;\"\u003e20 W\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eFunctional Safety\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSTO (IEC\/EN 61800-5-2), EN ISO 13849-1 Category 3 PL e, SIL 3\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eIP Protection Class\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eIP20 (Natural cooling \/ open design)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eAmbient Operating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e0 degC to 55 degC (no freezing)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eWeight\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e1.4 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e4.0 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;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; color: #1a365d; font-weight: bold;\"\u003eConnector \/ Terminal Block\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; color: #1a365d; font-weight: bold;\"\u003eSignal \/ Circuit 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: 8px; font-weight: bold;\"\u003eL1, L2, L3\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMain circuit AC power supply input (three-phase or single-phase)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eL11, L21\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eControl circuit AC power supply input (single-phase)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eU, V, W\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eServo motor power output (Phase U, Phase V, Phase W)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eP+, C\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eExternal regenerative resistor connections\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCN1A \/ CN1B\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSSCNET III\/H optical fiber bus connectors (In \/ Out)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCN2\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eServo motor encoder feedback interface\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCN5\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eUSB port for PC communication (MR Configurator 2)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCN8\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSTO (Safe Torque Off) functional safety connector\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\u003ch4\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nThe MR-J4-70B supports a built-in \u003cstrong\u003eJ3 Compatibility Mode\u003c\/strong\u003e, permitting commissioning in older MR-J3-based SSCNET III system layouts. This enables drop-in physical and functional hardware replacements on mature machine configurations without requiring immediate software or master-controller rewrites. Keep in mind that when operating in J3 compatibility mode, the communication speed defaults to 50 Mbps instead of the native 150 Mbps SSCNET III\/H capability.\n\u003c\/p\u003e\n\n\u003ch4\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nWhile the MR-J4-70B can operate on single-phase AC input, running the system with highly dynamic load cycles may stress the internal DC bus capacitor bank. Ensure your panel layout preserves a minimum of 10 mm spacing on both sides of the amplifier if multiple units are mounted adjacently, as natural convection cooling relies strictly on unobstructed vertical airflow. For heavy cyclic duty or large inertial mismatches, verify if the internal 20 W regenerative capacity is sufficient; if not, an external regenerative resistor must be added across terminal P+ and C with the internal resistor disconnected.\n\u003c\/p\u003e\n\n\u003ch4\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\nNever touch the polished faces of the SSCNET III\/H optical fiber cables. Dust, moisture, or light surface oils will attenuate the optical signal, inducing communication timeouts or erratic cyclic packet dropouts. Ensure the fiber bending radius never goes below 25 mm. Additionally, keep the low-voltage control and feedback lines (CN2\/CN8) isolated from power wiring (U\/V\/W and L1\/L2\/L3) by routing them through dedicated, grounded metallic conduits.\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;\"\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0; font-weight: bold;\"\u003eCRITICAL WARNING:\u003c\/p\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0.5rem 0 0 0;\"\u003e\n    HAZARDOUS VOLTAGE PRESENT. Disconnect and de-energize all main and control power feeds prior to physical installation or terminal wiring. Allow at least 15 minutes for the internal bus capacitors to discharge. Use a reliable digital voltmeter to confirm the DC bus voltage is zero across P+ and N- terminals before touching the terminals.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: bold;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eMount the amplifier vertically onto a flat, non-flammable back panel using standard mounting hardware to facilitate correct convective airflow through the cooling channels.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: bold;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eEstablish a solid protective ground connection via the dedicated earth terminals to mitigate electrical noise and prevent shock hazards.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: bold;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eWire the control power (L11\/L21) and main circuit input terminals (L1\/L2\/L3), ensuring appropriate branch-circuit protection fuses or circuit breakers are configured upstream.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-weight: bold;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0;\"\u003eConnect the encoder cable to CN2 and the SSCNET III\/H optical fibers to CN1A\/CN1B, verifying that the optical dust protectors are kept clean and stored safely.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102145896811,"sku":"MR-J4-70B","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/MR-J4-70B-mgdkwtnyx13.png?v=1776137888","url":"https:\/\/www.plcprotech.com\/products\/mitsubishi-electric-mr-j4-70b-melservo-j4-series-servo-amplifier","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}