Measurement Computing USB-1208HS-4AO - Manual (Page 21)

USB-1208HS-4AO User's Guide Specifications
21
Power
Table 12. Power specifications
Parameter Condition Specification
Operating modes Bus-powered, USB 5 V supply
Supply current
(see Note 1) Suspend mode <2.5 mA
Enumeration <100 mA
Run mode <500 mA
Power consumption
excluding analog and
digital outputs Run mode 1.175 W max (235 mA input current)
Power available for +5 V,
AICKO, AOCKO, TMR,
analog outputs, and
digital I/O Run mode 1.325 W max
The total power consumption for all external loads must be less than this
value, and each load must meet the individual specification for the
terminal.
Digital output power
calculation Power per output = Iout × 5 V
(for example, @ 24 mA, P = 0.024 × 5 = 120 mW / output)
Analog output power
calculation Power per output = (Iout × 16.5 V) / 0.78
(for example, @ 3 mA, P = (0.003 × 16.5) / 0.80 = 63.5 mW/output)
+5 V output power
calculation Power (W) = Iout × 5 V
+5 V output voltage
range (see Note 2) Run mode 4.25 V min, 5.25 V max
Suspend mode,
enumeration 0 V
+5 V output current Run mode, no
other output loads 265 mA max (1.325 W)
Fuses On USB supply 0452.750 - Littelfuse 0.750A NANO2® Slo-Blo® Subminiature Surface
Mount Fuse.
Spare fuse mounted in holder on PCB.
Note 1: This is the total current consumption for the USB-1208HS-4AO, including +5 V, digital output and
analog output currents (if supported).
Note 2: Output voltage range assumes input power is within specified limits.
USB specifications
Table 13. USB specifications
Parameter Specification
USB device type USB 2.0 (high-speed)
USB device compatibility USB 1.1, 2.0
USB cable length 5 m (16.40 ft) max
USB cable type A-B cable, UL type AWM 2725 or equivalent (min 24 AWG VBUS/GND,
min 28 AWG D+/D–).
Environmental
Table 14. Environmental specifications
Parameter Specification
Operating temperature
range 0 °C to 50 °C
Storage temperature
range –40 °C to 85 °C
Humidity 0% to 90% non-condensing