1. FUNCTIONS AND CONFIGURATION 
1 -  19 
 
(c) MR-J4-500A(-RJ) 
 
POINT 
 
The servo amplifier is shown with the front cover open. The front cover cannot 
be removed. 
 
 
No. Name/Application 
Detailed 
explanation
(1) 
Control circuit terminal block (TE2) 
Used to connect the control circuit power supply. 
(2) 
Main circuit terminal block (TE1) 
Connect the input power supply. 
Section 3.1
Section 3.3
(3) 
Battery holder 
Install the the battery for absolute position data 
backup. 
Section 
12.2 
(4) Rating plate 
Section 1.6
(5) 
Regenerative option/power factor improving reactor 
terminal block (TE3) 
Used to connect a regenerative option or a power 
factor improving DC reactor. 
(6) 
Servo motor power supply terminal block (TE4) 
Connect the servo motor. 
Section 3.1
Section 3.3
(7) 
Charge lamp 
When the main circuit is charged, this will light up. 
While this lamp is lit, do not reconnect the cables. 
 
(8) 
Protective earth (PE) terminal 
Grounding terminal 
Section 3.1
Section 3.3
(1)
(3)
(2)
(Note)
(8)
(4)
Side
(5)
(6)
(7)
The broken line area is the same as
MR-J4-200A(-RJ) or less.
   
 
Note. Lines for slots around the battery holder are omitted from the illustration.