Here are some key features and specifications of the MR-J4-70B controller:

Power Rating: The "70" in the model number indicates that the controller has a power rating of 700W.

Servo Network: It supports the CC-Link IE Field Network, which is a high-speed industrial Ethernet network used for real-time control and monitoring of various devices.

Advanced Control Algorithms: The MR-J4 series incorporates advanced control algorithms that provide improved responsiveness, precision, and stability to achieve high-performance motion control.

Positioning Control: It provides high-speed and high-precision positioning control capabilities, allowing for accurate and repeatable motion control in applications that require precise positioning.

Mitsubishi Servo Motor 

MR-J4-10A  
MR-J4-10B 
HG-KR053 HG-KR13 
HG-KM053 HG-KM13   
MR-J4-20A   
MR-J4-20B  
HG-KR23  
HG-KM23  
MR-J4-40A 
MR-J4-40B 
HG-KR43  
HG-KM43  
MR-J4-60A   
MR-J4-60B 
HG-SR51（B）J 
HG-SR52（B）J 
MR-J4-70A 
MR-J4-70B 
HG-KR73（B）J 
HG-MR73（B）J 
MR-J4-100A   
MR-J4-100B 
HG-SR81（B）J 
HG-SR102（B）J 
MR-J4-200A 
MR-J4-200B 
HG-SR121（B）J 
HG-SR201（B）J 
HG-SR152（B）J 
HG-SR202（B）J 
MR-J4-350A 
MR-J4-350B 
HG-SR301（B）J 
HG-SR352（B）J 
MR-J4-500A   
MR-J4-500B 
HG-SR421（B）J 
HG-SR502（B）J 
MR-J4-700A 
MR-J4-700B 
HG-SR702（B）J