OM-USB-5203 User's Guide
Specifications
28
USB +5V voltage
Table 16. USB +5 V voltage specifications
Parameter
Specification
USB +5 V (VBUS) input voltage range
4.75 V min to 5.25 V max
Power
Table 17. Power specifications
Parameter
Conditions
Specification
Connected to USB
Supply current
USB enumeration
<100 mA
Supply current (Note 3)
Continuous mode
500 mA max
+5 V output voltage range
(pins 21 and 47)
Connected to a self-powered hub. (Note 4)
4.75 V min to
5.25 V max
+5 V output current
(pins 21 and 47)
Connected to a self-powered hub. (Note 4)
10 mA max
Isolation
Measurement system to PC
500 VDC min
AC Adapter Power Supply (used for data logging operation)
Output voltage
5 V ±5%
Output wattage
2.5W
Input voltage
100 VAC to 240 VAC
50 Hz to 60 Hz
Input current
0.2 A
Note 3:
This is the total current requirement for the device which includes up to 10 mA for the status LED.
Note 4:
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. This device may not be used with bus-powered hubs due to the power supply
requirements.
Root Port Hubs reside in the PC USB host controller. The USB port(s) on your PC are root port hubs. All
externally powered root port hubs (desktop PC) 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.
USB specifications
Table 18. USB specifications
Parameter
Specification
USB device type
USB 2.0 (full-speed)
Device compatibility
USB 1.1, USB 2.0
Device power capability
Self-powered, 500 mA consumption max
USB cable type
A-B cable, UL type AWM 2725 or equivalent. (min 24 AWG VBUS/GND,
min 28 AWG D+/D–)
USB cable length
3 m (9.84 ft) max
