Connection Example - Mitsubishi Electric MR-J5 Series User Manual

8.3

Connection example

• Before turning off STO (STO1 and STO2), be sure to stop the servo motor by making the servo-off state or
with forced stop deceleration by turning off EM2 (Forced stop 2). Configure an external sequence that has
the timings shown below by using an external device.
STO1/STO2
EM2
Servo motor speed
• If STO is turned off during operation, the servo motor stops with the dynamic brake stop (stop category 0),
and [AL. 063 STO timing error] occurs.
Connection example for CN8 connector
This servo amplifier is equipped with the connector (CN8) which enables the STO function. When this connector is used with
a certified external safety relay, power to the motor can be safely removed and unexpected restart can be prevented. The
safety relay used should meet the applicable safety standards and have forcibly guided contacts or mirror contacts for the
purpose of error detection.
The following diagram is for source interface. For sink interface, refer to the following.
Page 222 Sink I/O interface
STO1
*2
STO2
24 V DC
Door
*3
*1 With TOFB, whether the servo is in the STO state can be confirmed. Refer to the following for a connection example.
Page 221 External I/O signal connection example using an external safety relay unit
The safety level depends on the setting value of [Pr. PF18 STO diagnosis error detection time] and whether STO input diagnosis by
TOFB output is performed or not. For details, refer to [Pr. PF18] in the following user's manual.
MR-J5-G/MR-J5W-G User's Manual (Parameters)
MR-J5-A User's Manual (Parameters)
*2 When using the STO function, turn off STO1 and STO2 at the same time. Also, before turning off STO1 and STO2, be sure to stop the
servo motor by making the servo-off state or with forced stop deceleration by turning off EM2 (Forced stop 2).
*3 Configure the interlock circuit so that the door opens after the servo motor stops.
8 USING STO FUNCTION [G] [A]
220
8.3 Connection example
ON
OFF
ON
OFF
0 r/min
CN8
Approx. 3.0 kΩ
*2
STO1 4
Approx. 3.0 kΩ
STO2 5
3
STOCOM
Open
Servo amplifier
CN8
6
8
7
*1
TOFB1
TOFCOM
TOFB2