Chassis system specifications
24
Model 6476 User Guide
2 • Chassis specifications
Chassis system specifications
A list of the 4U model 6476 chassis materials specifications is provided in
table 4
.
Power considerations
For DC systems:
•
An approved external source must be rated a maximum of 75 VDC, 7.0 A and provide over current protec-
tion upstream of the equipment.
•
An approved disconnect device with a minimum 3.0 mm contact separation must be provided upstream of
the device and rated at least 75 VDC, 7.0 A and be located so it is accessible to the operator.
•
This equipment shall be connected directly to the DC supply system bonding jumper from an earthing ter-
minal bar or bus to which the DC supply system earthing electrode is connected.
Table 4. 4U chassis materials specifications
Item
Description
Physical
•
Height—4U (7 in./17.78 cm)
•
Width—19 in. (standard EIA rack mount)
•
Depth—11.70 in. (29.70 cm)
DC interface
Rear DC interface panel includes dual ground lugs, -48V DC power
interface for
N+N
redundant power operation.
AC interface
Rear AC interface panel includes: an IEC 320 AC inlet connector,
ground lug, power fuses.
Slot configuration
•
Front—6U x 160 mm slots, Qty: 8
•
Rear—6U X 80 mm slots, Qty: 8
Slots are on 0.80 in. (2.0 cm) centers, except power slots are 1.6 in.
(4.1 cm) center
Module keying and alignment
4HP module spacing, cardguide provides for keying and alignment
pin in accordance with IEEE 1101.10, section 6
Card guides
Molded plastic with snap-in ESD contacts for plug-in module and
injector/ejector handle alignment pin
Plug-in unit injector/ejector handles
Subrack dimensional format accepts modules with injector/ejector
handles as specified in IEEE 1101.10, section 8
Operating environment
32–122°F (0–50°C), 5–95% relative humidity, non-condensing
Table 5. Power input and power supplies
Item
Description
Power input
DC: -48 VDC nominal (-36 to -75V)
AC: 115 - 230 VAC, 50–60 HZ
Maximum current
DC: 7.0 A per power input
AC: 5.0 A per power supply
Power supply fusing
DC: 250 V, 12.5 A, Slow blow (one fuse per PSU)
AC: 250 V, 5 A, Slow blow (one fuse per PSU)
