Safety
25
Electrical Safety
DC P
OWER
Warning
Voltages over 60 V DC can be present in this equipment. This
equipment is intended to be accessed, installed and maintained by qualified and
trained service personnel only.
Warning
Avoid electrical overload. To avoid electrical hazard, do not make
connections to terminals outside the specified voltage range of the shelf in use.
Warning
Although there are fuses in the power entry circuit of the shelf, power
lines must be protected on the rack level with 20A breakers.
Warning
Before removing a power entry module, make sure that the power
segments of other power entry modules are fully functional.
Warning
Before performing any of the following procedures, ensure that power
is disconnected from the DC circuit. To ensure that all power is switched off,
locate the circuit breaker on the panel board that services the DC circuit, switch
the circuit breaker to the off position, and tape the switch handle of the circuit
breaker in the off position.
Warning
Care must be given to connecting units to the supply circuit so that
wiring is not overloaded.
Caution
To maintain proper airflow, do not leave a power entry module slot open.
Note
The Shelf can be powered using a regular telecommunication power supply
of -48 VDC / -60 VDC with a voltage return. The specified voltage range is from
-40.5 VDC to -72 VDC.
ESD P
ROCEDURES
To prevent damage to
Avaya
element boards by random electrostatic
discharge (ESD), the use of wrist straps is highly recommended.