Mitsubishi Electric MELSERVO-J4 Series Transition Handbook page 237

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
3) CN8
When not using the STO function, attach the short-circuit connector supplied with the drive unit to
CN8 (STO I/O signal connector).
MR-J3-DU_B_
Connector pin assignment
4) CN40A
MR-J3-DU_B_
Connector pin assignment
1 11
2 12
ACD2
ACD2*
ACD3
ACD3*
3 13
4 14
PAL
PAL*
ACD1
ACD1*
5 15
6 16
LG LG
GOF
GOF*
7 17
8 18
PMC
PMC*
PSD
PSD*
9 19
10 20
LG
LG
PRD
PRD*
5) CN40B
When MR-J4-DU_B is used, the terminal connector (MR-J3-TM) does not need to be connected
to CN40B. (This product does not have a connector for the terminal connector.)
Signal
abbreviation
Connector pin No.
STOCOM
STO1
STO2
TOFB1
TOFB2
TOFCOM
Signal
abbreviation
Connector pin No.
CN40A-1 ACD2
CN40A-2 ACD3
CN40A-3 PAL
CN40A-4 ACD1
CN40A-5 LG
CN40A-6 GOF
CN40A-7 PMC
CN40A-8 PSD
CN40A-9 LG
CN40A-10 PRD
CN40A-11 ACD2*
CN40A-12 ACD3*
CN40A-13 PAL*
CN40A-14 ACD1*
CN40A-15 LG
CN40A-16 GOF*
CN40A-17 PMC*
CN40A-18 PSD*
CN40A-19 LG
CN40A-20 PRD*
5 - 36
MR-J4-DU_B_
Connector pin No. Connector pin assignment
CN8-1
CN8-2
CN8-3
CN8-4
CN8-5
CN8-6
CN8-7
CN8-8
MR-J4-DU_B_
Connector pin No. Connector pin assignment
CN40A-1
CN40A-2
CN40A-3
CN40A-4
CN40A-5
CN40A-6
CN40A-7
CN40A-8
CN40A-9
CN40A-10
CN40A-11
CN40A-12
CN40A-13
CN40A-14
CN40A-15
CN40A-16
CN40A-17
CN40A-18
CN40A-19
CN40A-20
1
2
4 3
STO1 STOCOM
6 5
TOFB1 STO2
8 7
TOFCOM TOFB2
1 11
2 12
ACD2
ACD2*
ACD3
ACD3*
3 13
4 14
PAL
PAL*
ACD1
ACD1*
5 15
6 16
LG LG
GOF
GOF*
7 17
8 18
PMC
PMC*
PSD
PSD*
9 19
10 20
LG
LG
PRD
PRD*