Power; Usb Specifications; Environmental - Measurement Computing USB-1208HS-2AO User Manual

USB-1208HS-2AO User's Guide

Power

Parameter
Operating modes
Supply current
(see Note 1)
Power consumption
excluding analog and
digital outputs
Power available for +5 V,
AICKO, AOCKO, TMR,
analog outputs, and
digital I/O
Digital output power
calculation
Analog output power
calculation
+5 V output power
calculation
+5 V output voltage
range (see Note 2)
+5 V output current
Fuses
This is the total current consumption for the USB-1208HS-2AO, including +5 V, digital output and
Note 1:
analog output currents.
Output voltage range assumes input power is within specified limits.
Note 2:

USB specifications

Parameter
USB device type
USB device compatibility
USB cable length
USB cable type

Environmental

Parameter
Operating temperature
range
Storage temperature
range
Humidity
Table 12. Power specifications
Condition Specification
Bus-powered, USB 5 V supply
Suspend mode <2.5 mA
Enumeration <100 mA
Run mode <500 mA
Run mode 1.125 W max (225 mA input current)
Run mode 1.375 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.
Power per output = Iout × 5 V
(for example, @ 24 mA, P = 0.024 × 5 = 120 mW / output)
Power per output = (Iout × 16.5 V) / 0.78
(for example, @ 3 mA, P = (0.003 × 16.5) / 0.80 = 63.5 mW/output)
Power (W) = Iout × 5 V
Run mode 4.25 V min, 5.25 V max
Suspend mode, 0 V
enumeration
Run mode, no 275 mA max (1.375 W)
other output loads
On USB supply 0452.750 - Littelfuse 0.750A NANO2® Slo-Blo®
Mount Fuse.
Spare fuse mounted in holder on PCB.
Table 13. USB specifications
Specification
USB 2.0 (high-speed)
USB 1.1, 2.0
5 m (16.40 ft) max
A-B cable, UL type AWM 2725 or equivalent (min 24 AWG VBUS/GND,
min 28 AWG D+/D–).
Table 14. Environmental specifications
Specification
0 °C to 50 °C
–40 °C to 85 °C
0% to 90% non-condensing
21
Specifications
Subminiature Surface