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MDS-D-SVJ3/SPJ3 Series Instruction Manual

2-8 Wiring of the peripheral control

2 - 43

2-8-5 Safety observation function

By using the safety observation function, the safety door, etc. can be opened during operation without

shutting the power. This function contributes to reducing preparation time and improving operation. The

safety is observed in the control section (NC) and drive section (servo drive unit and spindle drive unit). If

safety conditions are not satisfied in either system, emergency stop operation is applied and the power is

shut to secure the safety.

(1) Connection

The following three wirings are required for the safety observation.

[1] The state signal for the safety door of the machine is wired to both the NC unit side (DI) and drive

unit side (CN9 connector DI1). The double-protection for the wiring must be provided by wiring the

signal to each of the NC side and drive unit side as the following figure.

[2] Add the wiring to control the contactor in the NC unit side in order to shut the power when an error

occurs.

[3] In addition to the emergency stop wiring for the NC unit, add the external emergency stop wiring for

the CN3 connector.

MDS-D-SVJ3

MDS-D- SPJ3

ON/OFF

EMGX

DI1

Machine safety door

Contactor
(Note)
Prepared by
user

Contactor

unit

3-phase AC
power supply

Emergency

stop switch

Open/close switch (sensor)

Breaker
or
fuse
(Note)
Prepared by
user

Circuit protector
(Note)
Prepared by user

Contactor
(Note)
Prepared by
user