Power; General; Environmental; Mechanical - Measurement Computing us-1208fs User Manual

USB-1208FS User's Guide

Power

Parameter
Supply current (Note 6)
+5V USB power available (Note 7)
Output current (Note 8)
This is the total current requirement for the USB-1208FS which includes up to 10 mA for the status
Note 6:
LED.
Note 7: Self-powered hub refers to a USB hub with an external power supply. Self-powered hubs allow a
connected USB device to draw up to 500 mA.
Root port hubs reside in the PC's USB host controller. The USB port(s) on your PC are root port hubs.
All externally powered root port hubs (desktop PCs) provide up to 500 mA of current for a USB
device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the manufacturer.
A laptop PC that is not connected to an external power adapter is an example of a battery-powered root
port hub.
Bus powered hubs receive power from a self-powered or root port hub. In this case the maximum
current available from the USB +5 V is 100 mA. The minimum USB +5 V voltage level can be as low
as 4.1 V.
Note 8: This refers to the total amount of current that can be sourced from the USB +5 V, analog outputs and
digital outputs.

General

Parameter
Device type
Device compatibility

Environmental

Parameter
Operating temperature range
Storage temperature range
Humidity

Mechanical

Parameter
Dimensions
USB cable length
User connection length
Table 17. Power specifications
Conditions
Connected to self-powered hub
Connected to externally-powered root port hub
Connected to bus-powered hub
Connected to self-powered hub
Connected to externally-powered root port hub
Connected to bus-powered hub
Table 18. General specifications
Specification
USB 2.0 full speed
USB 1.1, USB 2.0
Table 19. Environmental specifications
Specification
0 °C to 70 °C
–40 °C to 70 °C
0% to 90% non-condensing
Table 20. Mechanical specifications
Specification
79 × 82 × 27 mm (3.10 × 3.20 × 1.05 in.)
3 m (9.84 ft) max
3 m (9.84 ft) max
25
Specifications
Specification
80 mA
4.5 V min, 5.25 V max
4.1 V min, 5.25 V max
420 mA max
20 mA max