Features and specifications

This topic provides a summary of the features and specifications of the chassis.

See Table 1. Rate of heat-dissipation calculations for forced-air fan cooling are provided in Table 2.

Table 1. Chassis features and specifications.

The features and specifications table is a two-column table where each column lists the features and specifications of the Lenovo Flex System Carrier-Grade chassis Type 7385.

Features and specifications
Node bays (on front): The chassis has fourteen node bays that support any of the following configurations:
  • Fourteen 1-bay compute nodes
  • Seven 2-bay compute nodes (with the shelves removed from the chassis)
The chassis can also support a combination of 1-bay and 2-bay compute nodes.
Note:
  • A 1-bay compute node occupies one node bay in the chassis.
  • A 2-bay compute node occupies two adjacent node bays (horizontally) in the chassis and requires the chassis shelf to be removed prior to installation.

Cooling:

Supports up to 10 variable-speed, hot-swap fan modules:
  • Two 40 mm fan modules
  • Up to eight 80 mm fan modules
Management modules:
  • Two hot-swap Chassis Management Modules

I/O modules:

Supports up to four scalable switch modules with each providing a 4-lane physical interconnect.

Module bays (on rear):
  • Two hot-swap Chassis Management Module bays
  • Six hot-swap power-supply bays
  • Ten hot-swap fan bays
  • Four hot-swap I/O bays
  • Two hot-swap fan logic bays
Size (11U):
  • Height: 483 mm (19.02 in.)
  • Depth: 854 mm (33.62 in.)
  • Width: 447 mm (17.6 in.)
  • Weight:
    • Fully configured (stand-alone): approximately 229.16 kg (505.2 lb) 6
    • Fully configured (in the rack): approximately 234.28 kg (516.5 lb) 6
    • Empty chassis with shelves: approximately 70.44 kg (155.3 lb)
    • Empty chassis without shelves: approximately 48.94 kg (107.9 lb)

Upgradeable microcode:

Microcode is upgradeable when fixes or features are added.
  • Chassis Management Module firmware
  • I/O module firmware
  • Compute node firmware
Approximate heat output:
  • Minimum configuration: 1365 Btu per hour (400 watts)
  • Maximum configuration: 44,017 Btu per hour (12,900 watts)

Declared sound power level:
  • 7.5 bels
Chassis airflow: Full chassis configuration with all nodes, I/O modules, power supplies, and fan modules installed.
  • Minimum - 270 CFM
  • Maximum - 1,020 CFM
Security features:
  • Login password for remote connection
  • Secure Sockets Layer (SSL) security for remote management access
  • Lightweight Directory Access Protocol (LDAP)
  • Trusted and signed firmware
Predictive Failure Analysis (PFA) alerts:
  • Power supplies
  • Node dependent features
Electrical input with dc supplies:
  • Rated voltage -48 to -60 V dc
  • Maximum steady state current not more than 70 A
  • Requires a UL listed circuit breaker that can supply up to 90 A for a minimum of 20 ms
Electrical input with ac supplies:
  • Rated voltage and frequency 200 - 240 V ac single phase at 47-63 Hz
  • Inrush current (chassis maximum) 40 A
  • Leakage current (chassis maximum) 580 uA
  • Branch circuit breaker 20 A maximum
Power supplies:
  • Minimum: Two hot-swap power supplies
  • Maximum: Six hot-swap power supplies
  • 2500 Watt, -48 to -60 V dc power supplies with 2 position power connector (NEBS level 3)
  • Optional 2500 Watt, 200 - 240 V ac power supplies with IEC 60320 type C20 line cord connector (ASHRAE Class A3)

Environment:

Flex System Carrier-Grade chassis equipped with -48 V dc power supplies are NEBS level 3 certified.
  • Operating, low altitude:
    • Relative humidity 5% - 85% 1
    • Temperature 5°C to 45°C (41°F – 113°F) 2
    • Maximum altitude 1829 m (6k ft)
    • Maximum rate of temperature change 30°C/hr (80°F/hr) 3
  • Operating, high altitude (includes fan failure):
    • Relative humidity 5% - 85% 1
    • Temperature 5°C to 45°C (41°F - 113°F) 2
    • Altitude range 1829-3960 m (6k-13k ft)
    • Maximum rate of temperature change 30°C/hr (80°F/hr ) 3
  • Operating, short-term excursions (room HVAC failure): 5
    • Relative humidity 5% - 93% 1
    • Temperature -5°C to 55°C (41°F - 131°F) 2
    • Maximum altitude 1829 m (6k ft)
  • Non-operating, storage: 4
    • Relative humidity 5% - 80% 1
    • Temperature 1°C to 70°C (33.8°F - 158°F)
    • Altitude 3050 m (10,006 ft)
  • Non-operating, shipment: 4
    • Relative humidity 5% - 100% 1
    • Temperature -40°C to 70°C (-40°F - 158°F)
    • Altitude 10,700 m (35,105 ft)
  1. Water to air ratio must never exceed 0.026 kg H20/ kg dry air.
  2. Derate maximum allowable temperature 1°C/213 m above 1829 m. Also note that this maximum temperature is for a self-standing system, not located in a rack. If in a rack, deduct 5°C.
  3. 30°C/hr for data centers employing disk drives, tape drives are not used.
  4. The equipment acclimation period is 1 hour per 30°C of temperature change from the shipping/storage environment to the operating environment.
  5. One excursion is defined at no more than four days (96 hrs), all excursions per year should not exceed 15 days (360 hrs).
  6. The fully configured chassis weight is based on all nodes and I/O modules being at their maximum design limit.
Table 2. Rate of heat-dissipation calculations for forced-air fan cooling.

The rate of heat-dissipation calculation for forced-air fan cooling table is a four-column table that lists the rate of heat dissipation calculations for the Lenovo Flex System Carrier-Grade chassis Type 7385.

  System International (SI) Units US Customary Units
A Dequip 800.1 mm (0.800 m) 31.5 inches (2.63 ft.)
B Dmain-aisle 1066.8 mm (1.067 m) 42.0 inches (3.5 ft.)
C Dwire-aisle 762.0 mm (0.762 m) 30 inches (2.5 ft.)
D Wframe 482.5 mm (0.483 m) 19.0 inches (1.583 ft.)
E Pin -47.5Vdc x 86.2A = 4094.5W -47.5Vdc x 86.2A = 4094.5W
F Pout - -
G Areaequip [A + (B/2) + (C/2)]* x D [A + (B/2) + (C/2)] x D
0.827 m2 8.91 ft.2
H HRequip (E – F) 4094.5W (E – F) 4094.5W
- HDframe (H/G) (H/G)
- -
Additional calculations for shelf-level equipment only
I Hshelf 482.0 mm (0.482 m) 19.5 inches (1.583 ft.)
J HDper shelf (H/G) (H/G)
4951.0 W / m2 459.5 W / ft.2
- HDper h (J/I) (J/I)
10271.8 W / m2 / m 290.3 W / ft.2 / ft.
K OHDper h Forced-Air Fans: 985 W / m2 / m Forced-Air Fans: 27.9 W / ft.2 / ft.
- hadd-vert If Required: (J/K) – I If Required: (J/K) – I
4.54 m 14.9 ft.
L hframe - -
M n If Required: (L x K) / J If Required: (L x K) / J
- Wadd-horiz If Required: {[(M+1) x H]/[L x (A+(B/2)+(C/2)) x K]}-D If Required: {[(M+1) x H]/[L x (A+(B/2)+(C/2)) x K]}-D