1.4 Wiring and mounting
1.4.1 Power wiring
(1) Requirement for overcurrent protection
Installation of an overcurrent protection device may be required to conform to specific safety
standards (such as UL60950-1). In such a case, be sure to install the overcurrent protection device
as shown below. It is not necessary to install overcurrent protection if there isn’t any requirement for
overcurrent protection in the specifications for DC power supply.
(3) Addition of shutdown circuit for motor power when an error occurs
If motor power needs to be shut down when an abnormality occurs, such as overload or abnormal
temperature, add a shutdown circuit for the motor power circuit. The IB will turn the motor off if these
conditions occur but motor power will need to be disconnected by using of an external device if necessary
for the application.
Abnormalities cannot be detected from communication data if the driver card’ s communication function is
not used. In order to shut down motor power, adding an external device to detect the abnormality and
disconnect motor power is necessary.
AC power
at factory
IB
(Overvoltage category 2)
Overcurrent
protection
DC power supply(Overvoltage category3)
AC power
at factory
IB
DC Power supply
Ethernet
Ethernet communication
Motor power
SW1
Contact for blocking
PC for control or PLC
AC power at
factory
Overcurrent
protection
(2) Installation of overcurrent protection
Install an overcurrent protection device to 24V DC line if any power supply other than limited
power source is used.
ESM safety system
according to local
safety rules
Overcurrent
protection
Overcurrent
protection
Motor
Ethernet
Overcurrent
protection
Overcurrent
protection
Control
IB
24V
24V
0V
0V
DC Power supply
DC Power supply
AC Power
at factory
SW1
EMS contact
MDR
Circuit
board
MDR
Circuit
board
L1 L2 L3
AC single or 3ph power supply
24V 0V
Devices grounding
Ensure that all power supplies are grounded
between their 0V output and the main earth terminal
and that all conveyor metalworks are effectively
bonded together and back to the main earth.
Original notice - A1.2
11
Wiring and mounting
IB-P05 Technical documentation
1. Introduction
• An EMS safety system should be installed according to risk analysis of the machine. EMS
relay is a safety function and must not be used as run/stop signal.
• EMS relay contact must be set before DC motor power supply, to avoid any electrical noise
(contact bounce, arching, etc…) that could damage electronic devices.
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