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Chapter 2. Installation
2-2 ATLAS 810
PLUS
User Manual 61200266L1-1
AC Powered Unit
The AC powered ATLAS 810
PLUS
(P/N 1200265L1) comes equipped with a
detachable 8-foot power cord with a 3-prong plug for connecting to a
grounded power receptacle.
DC Powered Unit
The DC powered ATLAS 810
PLUS
(P/N 1200266L1) comes equipped with a
terminal block on the rear of the unit. The power source should be connected
to the terminal block according to the polarity markings on the unit. For ex-
ample, a -48 V source would be connected with the -48 V return connected
to the (+) terminal and the -48 VDC attached to the (-) terminal. Power must
be from a DC power source in the range of 42 to 57 VDC, capable of deliver-
ing up to 7 A of current.
The
GROUNDING INSTRUCTIONS
This section provides grounding instruction information from the Under-
writers' Laboratory UL 1950 Standard for Safety of Information Technology
Equipment Including Electrical Business Equipment, of July 28, 1995.
An equipment grounding conductor that is not smaller in size than the un-
grounded branch-circuit supply conductors is to be installed as part of the
circuit that supplies the product or system. Bare, covered, or insulated
grounding conductors are acceptable. Individually covered or insulated
equipment grounding conductors shall have a continuous outer finish that
is either green, or green with one or more yellow stripes. The equipment
grounding conductor is to be connected to ground at the service equipment.
The attachment-plug receptacles in the vicinity of the product or system are
all to be of a grounding type, and the equipment grounding conductors serv-
ing these receptacles are to be connected to earth ground at the service
equipment.
Power to the ATLAS 810
PLUS
must be from a grounded 115 VAC,
60 Hz or 220 VAC, 50-60 Hz source.
• This unit shall be installed in accordance with Article 400 and
364.8 of the NEC NFPA 70 when installed outside of a Restricted
Access Location (i.e., central office, behind a locked door, service
personnel only area).
• The branch circuit overcurrent protection shall be a fuse or
circuit breaker rated minimum 48 V, maximum 20 A.
• A readily accessible disconnect device that is suitably approved
and rated shall be incorporated into the fixed wiring.