USB-Isolator USER`S MANUAL
Contents
1. Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Emall sales acromag com hitp www acromag com USB Isolator User s Manual 3 This circuit isolates USB power and data via two transformers Input power HOW IT WORKS is current limited to 200mA to help prevent damage to connected devices corresponding to 137mA out load Both signal lines are equipped with common mode filters and include transient protection USB is set to full speed 12 Mbps but can be jumped to low speed 1 5 Mbps for legacy device support S SS ooo C 7 SORE I Ac WM EIE dica i a bad TOTARGET sauce i Si ene ee NOTE FILTERINGIS at MEE qu 3 1500 VACECLATEN E USB ISOLATOR SIMPLIFIED SCHEMATIC 24 DIMENSIONS Acromag kg Q MODEL USB JISOLATOR wh 1 85 EE Oros EE Enclosure Depth 0 93 Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Email salesG acromag com http www acromag com 4 USB Isolator User s Manual Installation Guide to Quickly Establishing Communication Note This device is not intended to isolate hubs Note This isolator will break the path to earth ground Most personal computers connect the USB signal ground in common with the cable shield and earth ground The PC connector side of this isolator also holds signal ground in common with the connect2. Acromag USB Isolator USER S MANUAL S P ee ACROMAG INCORPORATED Tel 248 295 0880 30765 South Wixom Road Fax 248 624 9234 P O BOX 437 Email sales acromag com Wixom MI 48393 7037 U S A Web http www acromag com Copyright 2010 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8500 900 B10M012 2 USB Isolator User s Manual OVERVIEW Key Features Fully Isolated power and I O circuits for safety and increased noise immunity CE and FCC Compliant Designed to meet and exceed EN61000 specifications High retention USB connectors provide minimum withdrawal force of 15 Newtons USB bus powered and no need for external power USB Cable Included 1 meter USB cable Type A to Type B USB 2 0 compatible Changeable Data Rate allows selectable full speed 12Mbps Defaulf or low speed 1 5Mbps Wide Ambient Operation from 40 to 70 C 40 to 158 Hardened For Harsh Environments and includes protection from RFI EMI ESD EFT amp surges Has low radiated emissions per CE requirements Power LED provides power indication and overload indication Reset Push Button is a useful feature for reinitializing peripherals without unplugging cables Built in Current Limiting with Auto Retry prevents damage to isolator and connected USB devices Small compact and rugged housing design Easy to install with existing equipment No special drivers required
3. that the board be carefully removed Changing USB Speed from the enclosure and this requires handling at an ESD safe work station Note Default speed is set to Warning We do not recommend that you do this in the full speed 12Mbps field as it invites potential damage to sensitive internal circuitry 1 Open enclosure by unscrewing Philips head screw on bottom of the case a label sticker will have to be pulled up to access this screw 2 To Switch to Low Speed 1 5Mbps Remove jumpers J1 and J2 and replace as shown below right most position Note If both jumpers are not set the same way the unit will not function properly Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Emall sales acromag com http www acromag com 6 USB Isolator User s Manual Installation Changing USB Speed Troubleshooting This is an optional procedure to ch ISOLATOR to high speed jange the data rate of the USB 1 To Switch to High Speed 12Mbps Remove jumpers J1 and J2 and replace as shown below left most position Note If both jumpers are not set the same the unit wil not function properly 2 Carefully place board back into enclosure and mate both sides of enclosure Install the screw in the bottom of enclosure The isolator is now ready for operation POSSIBLE CAUSE POSSIBLE FIX The power LED does not light up when plugged into USB port No power on the USB port or USB port is bad Try
4. EN ical 60 96mmx46 99mmx23 495mm y Cable Length Maximum cable length is 5 meters on each side Connectors High retention USB Type A x 1 and USB Type B x 1 USB Interface connectors with minimum withdrawal force of 15 Newton s Data Rate Selectable full speed 12Mbps Default or low speed 1 5Mbps Transient Protection Transient Voltage Suppressors are applied at both the PC and target device ports The metal cable shield is connected to signal GND though a ferrite Power LED Constant ON if power is on and unit is OK Blinking ON OFF Controls and Indicators indicates unit is in current limit mode gt 137mA and the connected device is drawing too much power Safety Approvals All Pending CE marked EMC Directive Agency Approvals 2004 108 EC UL Listed ULS08 ANSI ISA 12 12 01 2007 cUL Listed Canada Standard 022 2 Nos 142 M1987 and 213 M1987 Electromagnetic Compatibility EMC munity Per European Norm EN61000 6 2 2005 Electrostatic Discharge ESD Immunity 4KV direct contact and 8KV air discharge to the enclosure port per IEC61000 4 2 Radiated Field Immunity RFI 10V M 80 to 1000MHz AM 1 4 to 2GHz 3V M and 2 to 2 7GHz 1V M per IEC61000 4 3 Electrical Fast Transient Immunity EFT 2KV to power and 1KV to signal VO per IECG1000 4 4 Conducted RF Immunity CRFI 10Vrms 150KHz to 80MHz per 1EC61000 4 6 Surge Immunity 0 5KV per IEC61000 4 5 Emissions Per European Norm EN61000 6 4 2007 Radiated F
5. or shield The target device connector side of this isolator does not transfer the earth ground connection across the barrier that was made at the PC side If the device that you are isolating must be earth grounded other provisions must be implemented to itroduce earth ground to the lated side 1 Connect B type plug square connector to PC connect side of the USB Isolator 2 Connect A type plug of USB cable to an available USB port on the computer the power LED will turn on when connected to a powered computer 7 N 3 Connect the A type plug flat connector to the device connect side of the isolator Connect the other side of the cable to the peripheral being isolated NOTE This device is not intended to isolate the trunk of a USB hub as its output current is limited to 137mA Acromag Ur 4 Your computer should prompt that a new device has been connected to the computer The power LED of the isolator should be ON and not blinking At this point you are ready to begin talking to your connected device TIP It your PC fails to detect your USB device try pushing the reset connection button on the Isolator Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Emallisales acromag com hitp www acromag com USB Isolator User s Manual 5 This is an optional procedure to change the data rate of the full speed 5 USB ISOLATOR to low speed Installation In order to change the speed it requires
6. plugging the unit into another USB port USB A B cable is bad Replace cable Cannot communicate with device connected through the Isolator Your computer does not support the peripheral Your device does not support 12Mbps Try changing internal jumpers to Tow speed see page 5 You do not have the speed set identically for each side Verify internal jumpers are BOTH set to the same speed The LED is ON and the peripheral i prompt me to indicate the device is connected powered but the computer will not Loose connection Check both cable connections make sure they are properly and securely fitted into the USB connection ports at both ends The PC could not recognize the device Press the reset connection button on the USB isolator If this does not work try replugging the cable Tplug in my device but the power LED is blinking and the computer will not prompt me that a device is connected Peripheral is drawing too much current for the isolator The USB isolator will not provide more than 120mA to peripheral Unplug peripheral and plug it directly into PC this is not isolated Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Emall sales acromag com hlipi WWw acromag com USB Isolator User s Manual 7 Case Material Plastic non conductive UL 94 HB flammability rating Dimensions 2 40 Length x 1 85 Wide x 0 925 High Es CI
7. requency Emissions 30 to 1000MHz per CISPR16 Class A WARNING This is a Class A product In a domestic environment this product may cause radio interference in which the user may be required to take adequate measures Power Supply Standard 5VDC power provided from the USB host Environmental computer up to 120mA of current Current Limit Isolator is equipped with a 200mA input limiter to isolator and this corresponds to 137mA out Once limit is reached power will open and retry momentarily repeatedly until the current draw is less than 200mA tion USB power and data circuits are isolated from each other for common mode voltages up to 250VAC or 354V DC off DC power ground on a continuous basis will withstand 1500VAC dielectric strength test for one minute without breakdown Complies with test requirements of ANSV ISA 82 01 1988 for voltage rating specified Operating Temp 40 C to 70 C 40 F to 149 F Relative Humidity 5 to 95 non condensing Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Emall sales acromag com http www acromag com 8 USB Isolator User s Manual Notes Acromag nc Tel 248 295 0880 Fax 248 624 9234 Emall sales acromag com hlipi WWw acromag com
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