Troubleshooting guide

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switch without grounding could result in electric shock or failures due to electrical noise.
• When the Switch is connected to a DC power supply unit, always connect the ground
terminal for proper grounding. Using the switch without grounding could result in electric
shock or failures due to electrical noise.
Systemize the power supply into 2 systems
• When setting up redundant power by connecting the Switch to a power supply greater than
AC230V, systemize the power supply into 2 systems so power can be supplied from each
system.
• When the power supplied from one system causes a maximum of 5 mA of leakage current
per device.
Connecting and disconnecting a DC power cable must be performed by a
trained technician or maintenance personnel.
• Connecting and disconnecting a DC power cable must be performed by a trained
technician or maintenance personnel. Terminal connections are required for connection of
the DC power cable to the power facility. For this reason, incorrect handling of the DC
power cable could result in fire or electric shock.
Set the power supply circuit breaker to OFF before connecting or
disconnecting the DC power cable.
• Set the power supply circuit breaker to OFF before connecting or disconnecting the DC
power cable. Connecting or disconnecting the cable with the circuit breaker set to ON
could result in an electric shock.
Place an insulation cover over the 0 V and -48 V terminals of DC power
cables.
• When using a DC power cable, place an insulation cover over the 0 V and -48 V terminals.
Using the terminals without an insulation cover could result in electric shock.
When using a DC power supply unit, do not use the terminal board with its
cover removed.
• When using a DC power supply unit, place a cover over the terminal board after
connecting the DC power cable. Using the terminal board without a cover could result in
electric shock.
Do not touch the voltage-measuring terminals.
• A power supply unit has voltage-measuring terminals. Do not use the terminals because
they are used for a factory inspection before shipment. In addition, do not insert anything
with a sharp point, such as a pin or paper clip, into the voltage-measuring terminals. Doing
so could result in fire or electric shock.
Installing and carrying the switch must be performed by trained personnel
or a professional carrier.
• The maximum weight of the switch is 82 kg. Installing and carrying the switch must be
performed by trained personnel or a professional carrier. If anyone other than those
mentioned above performs these tasks, the switch might fall, resulting in serious injury.
Use a handling device such as a hand lifter when installing or carrying the switch. Carrying
the switch without using a handling device might cause the switch to fall, resulting in
serious injury. Note that the following label is attached to the Switch.