ITOH DENKI CBV30 - Page 15

15
Safety precautions
Advance preparation
Check ProductInstallation/Wiring
Maintenance/Inspection
Specifications Control/Operation
4. Advance preparation
5. Check Product
CBV30UserManual
This product does not include the emergency stop equipment.
Customers must make sure to install it.
⑦Emergency stop
equipment
Regarding equipment where this product is incorporated, check that a breaker with
appropriate capacity for the 24 VDC power supply unit has been installed. If abnormal
operation should occur, protection through the breaker could be effective.
Note that when using an earth leakage breaker, select one that is “inverter corre-
sponding”. Some inverter non-corresponding earth leakage breakers could result in
malfunction, since they may recognize high-frequency components of the switching
power supply as leakage.
Make sure that circuit breaker and safety circuit can be operated before moving
forward trial run.
① Input to the DC power supply unit (AC power) is securely turned ON/OFF when
turning ON/OFF the breaker.
② Input to the DC power supply unit is securely turned OFF/ON when turning 
ON/OFF the safety circuit.
⑦-1 Checking the breaker
⑦-2Operation check
To this product
Emergency stop equipment
Breaker
24V DC
power supply
unit
AC power
Safety circuit
Installation of Over-current Protection device on DC power source.
The installation of specific over current protection device in power source might be
requested by specification DC power source that would requests safety standard
(UL62368-1, etc.). In this case, install specified over current protection device as shown
below. If this protection device is not requested by specification of DC power source, it is not
necessary to install.
⑧
Wiring for power supply
①
Installation of over-current protection device.
In case of using power supply device except a limit power supply, install the
over-current protection device on the 24V DC line.
②
Adding the circuit breaker on motor power line when abnormal circumstances.
There are not equipped motor overload protection and over-temperature sensing on this
product.
This product transmits an abnormal status data to external with I/O network, when abnormal
circumstances such as overload or high temperature rising condition but does not block out
the power. Therefore, if the power needs to be blocked out, add a circuit breaker on motor
power line as shown as SW1 below that is controlled by upper layer device (PLC).
Upper layer device needs to receive an abnormal status data from driver to block out the
power with circuit breaker SW1.
Separate overload detector needs to be added on the power line to block out the motor
power, when driver does not have communication to upper layer device.
③
AC power source
from facility
Over current
protection
DC power
DC power
I/O Communication
This product
Overvoltage category 2
Overvoltage category 3
PLC
AC power source
from facility
SW1
Braker contact
This product
I/O
Power