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2. Wiring and Connection
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2-7-3 Wiring of an external emergency stop
(1) External emergency stop setting
Besides the emergency stop input from the NC communication cable (CN1A, CN1B),
double-protection when an emergency stop occurs can be provided by directly inputting an external
emergency stop to the CN23 connector on the power supply unit. Even if the emergency stop is not
input from CNC for some reason, the contactors will be shut off by the external emergency stop
input from CN23 connector on the power supply unit.
[1] Connection
[2] Setting
When using the external emergency stop, the rotary switch on the front of the power supply unit and
the parameter (PTYP) of drive unit that controls the power supply must be set.
• Rotary switch setting: 4
• Parameter setting: Add "0040" to the setting of PTYP (Servo=SV036, Spindle=SP041).
Parameter settings
No.
Abbrevia-
tion
Parameter name Descriptions
SV036
SP041
PTYP Power supply type
When external emergency stop is validated, 0040 [hex] is added to PTYP for the drive
unit connected to the power supply unit.
CAUTION
The emergency stop signal input to the CNC side cannot be used as a substitute
for the external emergency stop function (CN23).
Mitsubishi NC
External emergency stop input
MDS-C1-V1/V2/SP
CN1A
CN4
MDS-C1-CV
CN4
CN1B
1 EMG1
2
N
C
3 EMG2
MC1
Emergency
stop
Alarm
Alarm
Contactor shutoff
command
CN23
MC1
L
21
L
11
SV1,2
SH21
FCUA-R000
FCUA-R000
SH21
Emergency
stop