Instruction manual

Safety Information
Safety - 3
Use the device only with the indicated power source.
z Use the device only with the indicated voltage of power. A fire or an electric shock might be caused.
Ensure that the capacity of incoming current to the distribution board should be larger
than the breaker operating current capacity.
z Ensure that the capacity of incoming current to the distribution board should be larger than the breaker
operating current capacity. Otherwise, the breakers cannot operate properly in case of trouble, which might
cause a fire.
Ground the switch.
z For the AC power and the AC (PoE) models, the power redundancy models with AC power supplies, and
the external power unit (EPU), make sure to use an outlet with a ground terminal. Not connecting the
grounded outlet to the switch can cause electric shocks, as well as a cause of failure due to electrical noise.
z For the DC power model and the power redundancy model with DC power supplies, use the ground cable
for grounding. Not connecting the grounded outlet to the switch can cause electric shocks, as well as cause
failures due to electrical noise.
A trained engineer or maintenance staff should attach and detach the DC power
supply cable.
z A trained engineer or maintenance staff should connect and disconnect the DC power supply cable to and
from the electrical power equipment. The terminals of the DC power supply cable are connected to the
electrical power equipment. Wrong handling of the DC power supply cable can cause a fire or an electric
shock.
Prior to connecting or disconnecting the DC power supply cable, turn off the circuit
breaker of the electrical power equipment.
z Prior to connecting or disconnecting the DC power supply cable, turn off the circuit breaker of the electrical
power equipment. Otherwise, a fire or an electric shock might result.
Cover the G and -48 V terminals of the DC power supply cable with an insulation
jacket.
z Cover the G and -48 V terminals of the DC power supply cable (on the electrical power equipment side)
with an insulation jacket. Otherwise, an electric shock might result.