Instruction manual

Safety Information
Safety-4
Use the Switch only with the indicated power source.
 Use the Switch only with the indicated voltage of power. A fire or an electric shock
might be caused.
Ensure that the capacity for incoming current to the distribution board is
greater than the operating current of the circuit breaker.
 Ensure that the capacity for incoming current to the distribution board is greater than
the operating current of the circuit breaker. If it is not, the circuit breaker might not
operate properly in the event of a failure, which could result in a fire.
Ground the Switch.
 For the AC power and the AC (PoE) models, the redundant power 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 cause failures due to electrical noise.
 For the DC model and the redundant power 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
cable.
 A trained engineer or maintenance staff should connect and disconnect the DC power
cable to and from the electrical power equipment. The terminals of the DC power
cable are connected to the electrical power equipment. Wrong handling of the DC
power cable can cause a fire or an electric shock.
Prior to connecting or disconnecting the DC power cable, turn off the circuit
breaker of the electrical power equipment.
 Prior to connecting or disconnecting the DC power 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 cable with an insulation
jacket.
 Cover the G and −48 V terminals of the DC power cable (on the electrical power
equipment side) with an insulation jacket. Otherwise, an electric shock might result.