Chassis system specifications
23
Model 6276 User Guide
2 • Chassis specifications
Chassis system specifications
A list of the 2U model 6276 chassis materials specifications is provided in
table 3
.
Power considerations
For DC systems, an approved external source must be rated a maximum of 75 VDC, 7.0 A and provide over
current protection upstream of the equipment.
For DC systems, 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.
For DC systems, 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 connected.
Table 3. 2U chassis materials specifications
Item
Description
Physical
•
Height—2U (5.25 in.)
•
Width—19 in. (standard EIA rack mount)
•
Depth—11.70 in. (29.70 cm)
DC power interface
Rear DC interface panel includes dual ground lugs, -48V DC power
interface for
N
+1 redundant power operation.
Optional power AC
Rear AC interface panel includes an IEC 320 AC inlet connector
equipped with a cord retaining clip, ground lug, and power fuses.
Slot configuration
•
Front—6U x 160 mm slots, Qty: 4 and 3U x 160 mm slots, Qty 2
•
Rear—6U X 80 mm slots, Qty: 4
Slots are on 0.80 in. (2.0 cm) centers
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 4. 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 input
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)
