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USB Isolators with Built-in Heavy-Duty Power Transfer - no external power supply needed

USB2ISO
USB Full Speed Isolator

USB2ISO USB 2.0 Full Speed Isolator

US$59.95          Free Express Shipping
VT USB-ISO-12
USB Full Speed Isolator (>800 mA)


VT USB-ISO-12 Full Speed Isolator

US$64.95         Free Express Shipping
VT USB-ISO-480
USB High Speed Isolator (>800 mA)

VT USB-ISO-480 High Speed Isolator

US$129.95         Free Express Shipping
 USB Speed   
Full Speed (12 Mbps)
 
 USB Speed   Full Speed (12 Mbps)
 Low Speed (1.5 Mbps) 
 USB Speed   High Speed (480 Mbps)
 Full Speed (12 Mbps)
 Low Speed (1.5 Mbps) 
 Current Output
 (5V ± 0.5V)
 > 400 mA*  Current Output
 (5V ± 0.5V) 
 > 800 mA*
 (if the USB port can supply)
 Current Output
 (5V ± 0.5V) 
 > 800 mA
 (if the USB port can supply)
 Data Isolation  1 kV   Data Isolation   2.5 kVDC @ 1 min   Data Isolation   2.5 kVDC @ 1 min 
 Power Isolation   1 kV   Power Isolation   2.5 kVDC @ 1 min   Power Isolation   2.5 kVDC @ 1 min 
 Connectors  USB-A-Plug for PC
 USB-A-Socket for USB cable
 to device
 Connectors  USB-A-Plug for PC
 USB-A-Socket for USB cable
 to device
 Connectors  USB-A-Plug for PC
 USB-A-Socket for USB cable
 to device
 Temperature Range   -40 °C ~ 50 °C    Temperature Range   -40 °C ~ 50 °C    Temperature Range   -40 °C ~ 50 °C  
 Size   50 × 25 × 12 mm   Size   50 × 23 × 14 mm   Size   50 × 23 × 14 mm 
     Undervoltage
 Protection 
 LED slow blinking   Undervoltage
 Protection 
 LED slow blinking 
     Overvoltage
 Protection 
 LED fast blinking   Overvoltage
 Protection 
 LED fast blinking 
     Overheating
 Protection 
 LED fast blinking   Overheating
 Protection 
 LED fast blinking 
     Power Efficiency   η ≥ 80%   Power Efficiency   η ≥ 80% 
 Supported Audio
 Interfaces 
 up to 96 kHz 24-bit stereo
 inputs & outputs
 Supported Audio
 Interfaces
 up to 96 kHz 24-bit stereo
 inputs & outputs 
 Supported Audio
 Interfaces
 All including 192 kHz, 384 kHz,
 768 kHz, 1536 kHz, 24-bit or
 32-bit, stereo or multi-channel
 inputs & outputs 
 Allow floating
 measurement
 using a DSO with
 single-ended
 inputs after
 isolation of
 earth ground? 
 Yes  Allow floating
 measurement
 using a DSO with
 single-ended
 inputs after
 isolation of
 earth ground?
  Yes  Allow floating
 measurement
 using a DSO with
 single-ended
 inputs after
 isolation of
 earth ground?
 It works perfectly in ground
 referenced measurements.

 In measurements without
 referencing to the ground,
 It may or may not work
 properly depending the
 potential of the point where
 the probe ground lead is
 connected to. Nevertheless,
 no short circuit and no
 damage will be incurred
 even if it is connected to a
 point with a high potential,
 unlike the case with no
 earth ground isolation.  
 Number of Isolators
 needed for
 VT hardware? 
 One isolator provides
 sufficient power to
 VT DSO:
 2810R, 2810, 2810E,
 2820R, 2820, 2820E,
 2A10, 2A20,
 VT RTA: 168A, 168B,
 VT UltraMic-384,
 VT IEPE-2G05,
 VT CAMP-2G05,
 333D01

 Two isolators provide
 sufficient power to
 VT DSO: 2A10E, 2A20E.
 A USB cable with two
 heads on the PC side
 should be used in this
 case.
 Number of Isolators
 needed for
 VT hardware?
 One isolator provides
 sufficient power to
 VT DSO**:
 2810R, 2810, 2810E,
 2820R, 2820, 2820E,
 2A10, 2A20,
 2A10E, 2A20E
 VT RTA: 168A, 168B,
 VT UltraMic-384,
 VT IEPE-2G05,
 VT CAMP-2G05,
 333D01
 Number of Isolators
 needed for
 VT hardware?
 One isolator provides
 sufficient power to
 VT DSO**:
 2810R, 2810, 2810E,
 2820R, 2820, 2820E,
 2A10, 2A20,
 2A10E, 2A20E, 
 VT RTA: 168A, 168B,
 VT UltraMic-384,
 VT IEPE-2G05,
 VT CAMP-2G05,
 333D01

* A standard USB 2.0 port (usually black in color) can output at least 500 mA while a standard USB 3 port (usually blue in color) can output at least 900 mA.  In fact, most computers' USB ports nowadays can supply a current of more than 1A.  However, many USB isolators in the market are unable to supply enough current to those power demanding USB devices such as USB oscilloscopes.

** The second-generation VT DSOs support both high speed (480Mbps) and full speed (12Mbps). High speed is preferrable as it is much faster than full speed, resulting in much faster screen refresh rates, and much higher sustainable sampling rates under the streaming mode.

Important note: Isolating the ground of an oscilloscope from the protective earth, through a battery-powered laptop or USB isolator, is a safety hazard, be sure that the oscilloscope probe ground lead never toughs anywhere with a dangerous potential above the earth ground.


1. The USB Galvanic Isolator is used for:
1) Protection of computer and attached USB devices - GREAT for LAB & Field use!
2) Protection of electronic test and measurement devices such as USB oscilloscopes and USB signal generators, as well as the circuits under test, when doing electronic measurements
3) Protection of programmers and circuit boards when programming embedded boards
4) Allow safe serial port galvanic separation for communication
5) Avoiding ground loops between devices - for instance PC->USB Isolator->USB SoundCard->Audio Power Amplifier to eliminate hum created by gound loops


2. Package Contents
1) USB Isolator


3. How does it work?
Just plug the USB isolator into a USB port of a hub or PC and then plug your USB device into the USB isolator.  The PC and your USB device now have no electrical connection but can still talk to each other. The USB isolator module also transfers power from the PC to your USB device with no electrical connection. Your USB device is now protected and can be attached to other ground potentials without any ground loops that could destroy your computer, USB device and other attached electronic devices.


USB2ISO USB 2.0 Full Speed Isolator Diagram
 

4. Examples
1. How to make floating or isolated measurements and break the ground loop with a USB oscilloscope? 



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