IMC Networks Giga-AcessEtherLinx-II operation manual DC Power Supply Precautions

DC Power Supply Precautions

The following precautions must be observed when installing the chassis model with an internal DC power supply.

1. Check nameplate ratings to ensure there is no overloading of supply circuits that

could affect over current protection and supply wiring.
2. In addition, the following must be observed:
a.	Connect the equipment to a 36 to 56.7 V DC power source that is
	electrically isolated from the alternating current source.
		Nominal	Minimum	Maximum	Transient
		Voltage	Voltage	Voltage	Voltage
		48	36	56.7	75.0*
	* 75.0-V transient with a duration of 10.0 ms with a rate of rise and fall of
	10 V/ms. The equipment shall meet its operational specifications during
	the transient.
b.	Route input wiring to terminal block and secure in such a manner that it is
	protected from damage and stress. Do not route wiring past sharp edges or
	moving parts.
c.	Incorporate a readily accessible disconnect device, with a 3mm minimum
	contact gap in the fixed wiring.
d.	Install only in Restricted Access Areas (dedicated Equipment Rooms,
	Equipment closets or the like) in accordance with Articles 110-18, 110-26,
	and 110-27 of the National Electric Code, ANSI/NFPA 70.
e.	Provide a listed circuit breaker suitable for branch circuit protection of the
	wiring and rated maximum 1A @ 48 V DC.
f.	For supply connections, use wires suitable for at least 75° C.

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