IAI America ERC3 - Manual (Page 145)

Chapter 3 Wiring
3.5 MEC Mode 2 (Operation Using PIO Converter)
135
(2) External 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 The motor driving power line MPI that is to be turned ON/OFF at contact CR2 and the load
current of the emergency stop signal EMG(-) are follows;
ERC3 high output setting valid: 3.5A (MAX. 4.2A) Load current
ERC high output setting invalid: 2.0A
During in-rush 8.3A
[Refer to 10.3 for the compliance with Safety Categories.]
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
MPO
Motor power
supply
PIO Converter
CR1
S1 S2 S1 S2 S1
CR2 CR1
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
GND
CR2 (Note 3)
CP24V
MPI
MPO
EMG (-)
CR2
PIO Converter
Nth unit
GND CP24V
MPI
MPO
EMG(㧙)
CR2
GND
EMG (-)
MPI
GND CP24V
MPI
MPO
EMG (-)
Emergency-stop
switch on the teaching
pendant
Emergency stop
reset switch
Emergency
stop switch