Owners Manual

NOTE: The system chassis must be positively grounded to the rack cabinet frame. Do not attempt to connect power to
the system until grounding cables are connected.
CAUTION: A qualified electrician must perform all connections to DC power and safety grounds. The system must be
safety grounded at the cabinet frame. All electrical wiring must comply with applicable local or national codes and
practices.
CAUTION: This equipment is designed to permit the connection of the earthed conductor of the DC supply circuit to the
earthing conductor on the equipment. See the installation instructions. If this connection is made, all of the following
conditions must be met.
• This equipment must be connected directly to the DC supply system earthing electrode conductor or to a bonding jumper from an
earthing terminal bar or bus to which the DC supply system earthing electrode conductor is connected.
• This equipment must be located in the same immediate area (such as, adjacent cabinets) as any other equipment that has a
connection between the earthed conductor of the same DC supply circuit and the earthing conductor, and also the point of earthing
of the DC system. The DC system must not be earthed elsewhere.
• The DC supply source must be located within the same premises as this equipment.
• The earthed circuit conductor between the DC power source and the earthing electrode conductor must not be connected to
switching or disconnecting devices.
Precaution Statements
This product is intended for restricted access locations (dedicated equipment rooms, equipment closet, or the like) in accordance with the
National Electrical Code, American National Standards Institute (ANSI)/National Fire Protection Association (NFPA) 70.
CAUTION:
Wire the unit with copper only. Unless otherwise specified, use only 4 American Wire Gauge (AWG) wire
rated minimum 90 ºC (194 ºF) for source and return. Protect the –(48–60) V DC (1 wire) with a branch circuit
overcurrent protection rated 100 A for DC with a high interrupt current rating.
Connect the equipment to a –48 V DC supply source that is electrically isolated from the AC source (reliably grounded 48 V DC SELV
source). Ensure that the –48 V DC source is secured to earth (ground).
NOTE:
A readily accessible disconnect device that is suitably approved and rated must be incorporated in the field
wiring.
CAUTION: When stranded wiring is required, use approved wiring termination, such as closed-loop or spade-type with
upturned lugs. These terminations are the appropriate size for the wires and must be double crimped, one on the
conductor and one on the insulation.
CAUTION: When installing the unit, the ground connection must always be made first and disconnected last to prevent
an energy hazard.
CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground
conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable
grounding is available.
Input Requirements
• Supply voltage: –(48–60) V DC
• Current consumption: 75 A (maximum)
Kit Contents
• Molex # 394260002 at PSU end
• Molex # 39422-0012 mating DC power connector
Required Tools
• Hand-crimping tool (Tyco Electronics 1490749-1, Upper Die 1490414-2, Lower Die 1-1490413-6).
• Wire-stripper pliers capable of removing insulation from size 4 AWG solid or stranded, insulated copper wire.
NOTE:
Use alpha wire part number 3080 or equivalent (65/30 stranding).
66 Installing Enclosure Components