IAI America ERC3 - Manual (Page 144)

Chapter 3 Wiring
3.5 MEC Mode 2 (Operation Using PIO Converter)
134
3.5.3 Circuit Diagram
Sample circuit diagrams are shown below.
[1] Power Line and Emergency Stop Circuit
(1) Built-in Drive Cutoff Relay Type
Note 1 When the teaching pendant is not connected, S1 and S2 become short-circuited inside the
controller.
Note 2 For CR1, select the one with coil current 0.1A or less.
Note 3 This circuit is equivalent to Safety Category 1.
The load current for the emergency stop signal EMG (-) to turn ON/OFF at contact CR1 is 24V
DC and 20mA.
Caution:
• Do not attempt to cut the 0V circuit of GND whit the emergency stop. Doing so may burn the
internal circuit. If an absolute shutoff of the power supply is required, conduct it on the primary
side of DC power supply (alternating current side).
• In case the power source for each controller is different, join the 0V of each power supply
together.
CR1 (Note 2)
CP24V GND
S2
MPI
MPO
EMG (-)
Motor power
supply
PIO Converter
CR1 (Note 3)
CR1
S1 S2 S1 S2 S1
PIO Converter
1st unit
24V 0V
PIO Converter
2nd unit
(Note 1)
Control
power supply
PIO
Converter
2nd unit
PIO
Converter
Nth unit
Emergency
stop signal
ERC3
Drive cutoff relay
EMG (-)
MPI
MPO
CP24V
PIO Converter
Nth unit
EMG (-)
MPI
MPO
CP24V
GND
GND
EMG (-)
MPO
CP24V
Emergency-stop
switch on the teaching
pendant
Emergency stop
reset switch
Emergency
stop switch