Products Manual
USB-ISO-M - Full Speed USB Isolator

Introduction of USB-ISO-M

The USB-ISO-M is a rugged, industrial-grade full / low speed USB isolator that provides high-voltage 3 kV isolation to protect the host computer and expensive USB equipment connected.  This Industrial USB Isolator is designed to build protective isolation barriers to the power and USB signals between a host computer and any connected USB devices. Both the computer and the connected USB device are protected from power surges, EMI/RFI interferences, and transient voltage spikes that may cause damage. The isolator is very efficient and secured to eliminate ground loop currents and protect against overvoltage.

The USB-ISO-M can be configured for data transfer rate to either USB 2.0 full speed 12 Mbps or low speed 1.5 Mbps. The isolator is bus-powered and provides up to 420 mA current to downstream devices. There is no need for any driver or software installation. Just plug the cable from the USB isolator to the host USB port of the PC, and connect the USB device to the downstream port of the isolator, the host PC and USB device are immediately protected by isolation to prevent from harmful voltage, ESD shock and noise.

The USB Isolator helps improve the system stability and protect the valuable industrial and medical equipment. When the USB host and USB devices operate at different ground voltages, the USB-ISO-M is an ideal protector to prevent destructive damage.


  • Isolates and protects any USB devices from a USB Host

  • Electrical isolation up to 3000 Vrms upstream to downstream USB port

  • Common mode filtering on all data lines

  • 5V isolated pass-thru power up to 420 mA to downstream device

  • Support USB2.0 full speed 12 Mbps by default setting

  • USB1.1 low speed 1.5 Mbps data rate selectable by jumpers

  • High speed USB devices works in full speed mode

  • No software or drivers installation required

  • Short circuit protection

  • LED for power indication.

  • Wide ambient temperature operation -40 to 70°C (-40 to 158°F)

  • USB bus-powered

  • Packed in rugged metal case with USB cable securely locked to the case

  • Metal case with DIN rail brackets

  • Dimensions : 73 mm X 52 mm X 25 mm (L x W x H)
                         73 mm X 75 mm X 25 mm (L x W x H) with DIN rail bracket

  • CE, FCC approval

  • RoHS and RoHS2 compliant


Compliance USB 1.0/1.1 compliant, USB 2.0 compatible
Speed 1.5 Mbps, Low speed data rate
12 Mbps, Full speed data rate
USB interface
Upstream USB A-type male connector with 3 ft USB cable
Downstream USB A-type female connector with screw holes for lock the USB cable
USB Port Protection
ESD Protection 15KV for Upstream and Downstream USB port
Isolates and protect Electrical isolation up to 3000Vrms
Short protect With short circuit protection
Power Supply
Input Bus-powered
No external power adapter required
Output 5VDC 420 mA (max) through USB downstream port pin1
Maximum Rating of USB-ISO-M
Downstream Port Load Load < 420 mA
Downstream Port Output Voltage 4.85 VDC ~ 5.15 VDC
Driver Support
OS No software or drivers required
Chassis SECC metal chassis with DIN rail bracket
Dimensions 73mm X 52 mm X 25mm (L x W x H)
73mm X 75 mm X 25mm (L x W x H) with ears
Weight 190g
Operating Temperature -40°C ~ 70°C (-40°F to 158°F)
Operating Humidity 5 to 95% RH
Storage Temperature -40°C ~ 85°C (-40°F to 185°F)
Safety Approvals CE, FCC

USB port pin-out
  Pin Number Name Description  
  Pin1 VBUS Provides +5 VDC 420 mA (max) output power  
  Pin2 D- USB data-  
  Pin3 D+ USB data+  
  Pin4 GND Ground