A - 1 . Safety Instructions. (Always read these instructions before using the equipment.) Do not attempt to install, operate, maintain or inspect the servo amplifier and servo motor until you have read through this Instruction Manual, Installation A 1 -phase 230VAC power supply may be used with the servo amplifier of MR - J2S-70A or less. 3 - 67. 3. SIGNALS AND WIRING. 3.13.3 Servo motor terminals. Pin. Signal. Pin. Signal. A. MD. K. B. MDR. L . C. MR . M. D MR - ENCBL2M -H.