6-
4
SAFETY I/O interface
6
1. SAFETY I/O interface overview
Connections using the MPB-E2 enable switch compatible programming unit with
external emergency stop circuit (PNP specifications)
G N D
G N D
2 4 V
MPB connector
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 1
P . C O M
D I 0 2
EMGRDY
L C K I N 4
EMG24V
L C K I N 3
L C K I N 2
L C K I N 1
EMGIN4
EMGIN3
EMGIN2
EMGIN1
1
1 4
1 3
1 0
9
8
7
6
5
4
3
SAFETY
connector
M P B - E 2
External emergency stop circuit
Emergency
stop switch
Service key
switch
Emergency
stop switch
Enable
switch
Motor power
relay coil
Motor power
supply circuit
AC 200V power supply
Operation description:
• The MPB-E2 emergency stop switch and external emergency stop switch are connected
in series. The enable switch is also connected in series to the MPB-E2 emergency stop
switch, but can be bypassed with the service key switch.
1. When the service key switch contact is close:
The enable switch is inoperable at this point.
a. In normal operation, EMG 24V is connected to EMG RDY via the MPB-E2
emergency stop switch and SAFETY connector, and turns on the controller internal
motor power relay.
b. When emergency stop is triggered, power to EMG RDY of the SAFETY connector
is cut off and the motor power supply turns off. Emergency stop is triggered if the
MPB-E2 and SAFETY connector are removed.
c
CAUTION
External emergency stop and the
MPB emergency stop button are
disabled when pin 13 and pin 14 are
directly shorted to each other on the
SAFETY connector. Make
connections to ensure the system
including the robot controller will
always operate safely.
c
CAUTION
• EMG RDY requires at least
100mA for the relay and
photocoupler drive current.
• Do not use EMG 24V for
anything other than emergency
stop.
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