Lenovo ThinkSystem ST250 V2 Maintenance Manual page 16

Table 1. Specifications (continued)
Specification
System fans
Electrical input
Power supply
Acoustical noise
emissions
Approximate heat output
ThinkSystem ST250 V2 Maintenance Manual
6
Description
This server comes with the following fans:
• One heat sink and fan assembly (80 x 80 x 25 mm)
• Two front system fans for drives (92 x 92 x 25 mm)
• One rear system fan (120 x 120 x 25 mm)
Universal input:
• Low range: 100 to 127 Vac
• High range: 200 to 240 Vac
• Input frequency range: 50 to 60 Hz
Note: ThinkSystem ST250 V2 only supports AC input power. Do not use 240 VDC
input.
Depending on your configuration, the server comes with one of the following power
supply configurations:
• One 250W or 300W fixed power supply
• One or two 550W redundant power supplies
The server has the following acoustic noise emissions declaration:
• Sound power level (L
WAd
– Idling: 4.3 Bel (Typical), 4.4 Bel (Max)
– Operating: 4.3 Bel (Typical), 4.5 Bel (Max)
• Sound pressure level (L
– Idling: 27.4 dBA (Typical), 28.6 dBA (Max)
– Operating: 27.6 dBA (Typical), 29.0 dBA (Max)
Notes:
• These sound levels were measured in controlled acoustical environments according
to procedures specified by ISO7779 and are reported in accordance with ISO 9296,
SPL is measured by bystander position(1m).
• The declared acoustic sound levels are based on the following configurations, which
may change depending on configuration/conditions, for example M.2 drive,
Broadcom 57414 25Gb NIC, Broadcom 57416 10Gb NIC, T1000, etc.
– Typical: 1x 80W CPU, 4x 32GB DIMM, 2x HDD or SSD, RAID 5350-8i, 1x 300W
PSU
– Max: 1x 95W CPU, 4x 32GB DIMM, 2x HDD or SSD, 2x 550W PSU
• Minimum configuration: 358.05 BTU per hour (105 watts)
• Maximum configuration: 1029.82 BTU per hour (302 watts)
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