HP QUICKSPECS DC7900 - Manual (Page 49)

Interface modes USB communications through USB port
SCM protocol
Automatic card insertion/removal detection
Reader performance
interface USB connection
Electro-magnetic
standards Europe 89/336/CEE guideline
USA USAFCC part 15
HP USB PS2 Washable
Keyboard Physical
characteristics Keys 104 (US) Layout, 105 (EU) layout --
depending upon country
Dimensions (L x W x H) 17.67x 6.62 x 1.38 in (449 x 168 x 35 mm)
Weight 1.7 lb (0.77 kg) minimum
Electrical Operating voltage + 5VDC ±5%
Power consumption 50-mA maximum (with three LEDs ON)
System interface USB Type A plug connector
ESD CE level 4, 15-kV air discharge
EMI - RFI Conforms to FCC rules for a Class B
computing device
Microsoft® PC 99 - 2001 Functionally compliant
Mechanical Keycaps Stepped -profile design
Switch actuation 55-g nominal peak force with tactile feedback
Switch life 20 million keystrokes
Switch type Contamination-resistant switch membrane
Key-leveling
mechanisms For all double-wide and greater-length keys
Cable length 7 ft (2.2 m)
Microsoft PC 99 - 2001 Mechanically compliant
Acoustics 43-dBA maximum sound pressure level
Environmental Operating temperature 50° to 122° F (10° to 50° C)
Non-operating
temperature -4° to 149° F (-20° to 65° C)
Operating humidity 10% to 95% (non-condensing at ambient)
Non-operating humidity 0% to 95% (non-condensing at ambient)
Operating shock 40 g, six surfaces
Non-operating shock 80 g, six surfaces
Operating vibration 2-g peak acceleration
Non-operating vibration 4-g peak acceleration
Drop (out of box) 26 in (66 cm) on carpet, six-drop sequence
Drop (in box) 42 in (107 cm) on concrete, 16-drop
sequence
Approvals UL, cUL, FCC, CE, TUV GS, VCCI, BSMI, C-Tick, KCC, USB-IF,
WHQL, EN/IEC 60601-1, IP66/NEMA4X
Ergonomic compliance ANSI HFS 100, ISO 9241-4, and TUVGS
QuickSpecs
HP Compaq dc7900 Business PC
Technical Specifications - Input/Output Devices
DA - 13029 Worldwide QuickSpecs — Version 24 — 10/30/2009 Page 49