Wiring; Power Supply Circuit; Safety Circuit - Mitsubishi Electric R64MTCPU User Manual

3.5

Wiring

Refer to the following for details of wiring the power supply, and grounding.
MELSEC iQ-R Module Configuration Manual
Refer to EMC directives for measure against noise . (Page 68 EMC DIRECTIVES)

Power supply circuit

This section describes the noise suppression techniques of the power supply circuit.
Grounding
The Motion system may malfunction as it is affected by various noises such as electric path noises from the power supply
lines, radiated and induced noises from other equipment, servo amplifiers and their cables, and electromagnetic noises from
conductors. To avoid such troubles, connect the earthing ground of each equipment and the shield grounds of the shielded
cables to the earth.
For grounding, use the exclusive ground terminal wire of each equipment or a single-point earth method to avoid grounding by
common wiring, where possible, since noises may sneak from other equipment due to common impedances.
Refer to the following for details of grounding.
MELSEC iQ-R Module Configuration Manual
Servo amplifier Instruction Manual

Safety circuit

Concept of safety circuits
When the Multiple CPU system is powered on and off, normal control output may not be done momentarily due to a delay or a
startup time difference between the Multiple CPU system power supply and the external power supply (DC in particular) for
the control target.
Also, an abnormal operation may be performed if an external power supply fault or Motion controller failure takes place.
To prevent any of these abnormal operations from leading to the abnormal operation of the whole system and in a fail-safe
viewpoint, areas which can result in machine breakdown and accidents due to abnormal operations(e.g. emergency stop,
protective and interlock circuits) should be constructed outside the Multiple CPU system.
Emergency stop circuit
The circuit should be constructed outside of the Multiple CPU system or servo amplifier. Shut off the power supply to the
external servo amplifier by this circuit, make the electromagnetic brakes of the servomotor operated.
3 INSTALLATION AND WIRING
54
3.5 Wiring