Patton electronics ForeFront 6676, Руководство пользователя

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2 • Installation checklist Model 6676 6U CPCI Chassis Assembly User Guide
28 6U quick set-up checklist
Power cable installation
This section describes installing the DC power and ground cables.
.
Installing the power cables
This section describes installing the power cables into the DC power input module. Do not connect the
remaining end of the power cables to the DC power source at this time. Each DC power supply module
comes with two power input terminal blocks (J1 +/- and J2 +/-). The Model 6676 can draw power from
sources connected to either of these terminal blocks (inputs are diode-ORed and combined to provide for
redundant power input). Although the power supply module is designed to operate normally with one power
source, users may want to connect two independent power sources, one to each terminal block, to provide
uninterrupted operation in the event of one source failure.
1. Connect the earth ground of the DC source to the grounding stud on the DC power supply as described
in section “Grounding the Model 6676” on page 29.
Verify that the installation site is in compliance with the following
power requirements before installling the ForeFront Xtreme chassis:
• An approved external source must be rated a maximum of 72
VDC, 10 A and provide over current protection upstream of
the equipment.
•
An approved disconnect device with a minimum 3.0 mm con-
tact separation must be provided upstream of the device and
rated at least 75 VDC, 7.0 A and be located so it is accessi-
ble to the operator.
• This equipment shall be connected directly to the DC supply
system bonding jumper from an earthing terminal bar or bus
to which the DC supply system earthing electrode is con-
nected.
•
This equipment shall be located in the same immediate area
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 shall not be earthed elsewhere.
• There shall be no switching or disconnecting devices in the
earthed circuit conductor between the DC source and the
point of connection of the earthing electrode conductor.
Remove power plugs from all power inputs prior to servicing.
Use AWG 12 copper conductors to feed power to the DC supply.