USB Isolator User`s Manual
Contents
1. 1 Electrostatic Discharge Immunity ESD per IEC 61000 4 2 2 Radiated Field Immunity RFI per IEC 61000 4 3 3 Electrical Fast Transient Immunity EFT per IEC 61000 4 4 4 Surge Immunity per IEC 61000 4 5 5 Conducted RF Immunity CRF per IEC 61000 4 6 Emissions per BS EN 61000 6 3 1 Enclosure Port per CISPR 16 2 Low Voltage AC Mains Port per CISPR 14 16 3 DC Power Port per CISPR 16 4 Telecom Network Port per CISPR 22 Note This is a Class B product Reliability Prediction MTBF Mean Time Between Failure MTBF in hours using MIL HDBK 217F FN2 Per MIL HDBkK 217 Ground Benign Controlled GgGc USB ISOLATOR 1 899 812 hrs 1 638 160 hrs Power Supply Standard 5VDC power provided from the USB host 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 Isolation USB power and data circuits are isolated from each other for common mode voltages up to 250VAC or 354V DC off DC power f ground on a continuous basis will withstand 1500VAC dielectric Environmental strength test for one minute without breakdown Complies with test requirements of ANSI 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 Acromag2. Inc Tel 248 295 0880 Fax 248 624 9234 Email sales acromag com http www acromag com
3. connected USB devices Small compact and rugged housing design Easy to install with existing equipment No special drivers required Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Email sales acromag com http www acromag com USB lIsolator 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 AND SIGNAL oy O ap amp lt FROM PC ae DATA NOTE FILTERING IS DATA SIMPLIFIED FOR THIS DRAWING SHIELD 1500 VAC ISOLATION o Gd USB TO TARGET m vatal A TYPE DEVICE DATA COMMON MODE FILTER SHIELD PUSH BUTTON COMMON MODE FILTER USB ISOLATOR SIMPLIFIED SCHEMATIC DIMENSIONS Acromag i MODEL USB ISOLATOR a 1 85 CONNECT B TE O im RESET CONNECTION Enclosure Depth 0 93 Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Email sales acromag com http www acromag com A USB Isolator User s Manual Symbols on equipment A Means Refer to User s Manual this manual for additional information Installation Guide to Quickly Establishing Communication Note This dev
4. output current is limited to 137mA Acromag Ea Acromag Inc Tel 248 295 0880 Fax 248 624 9234 Email sales acromag com http www acromag com USB lIsolator User s Manual D 4 Your computer should prompt that a new device has been connected to Installation 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 If your PC fails to detect your USB device try pushing the reset connection button on the Isolator This is an optional procedure to change the data rate of the full speed Changing USB Speed USB ISOLATOR to low speed l l Note Default speed is set to In order to change the speed it requires that the board be carefully removed full speed 12Mbps from the enclosure and this requires handling at an ESD safe work station Warning We do not recommend that you do this in the field as it invites potential damage to sensitive internal circuitry 1 Open enclosure by unscrewing Phillips 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 Email sales acromag com http www acromag com 6 USB lIsolator User s Manual Installation Thi
5. Acromag kj USB Isolator USER S MANUAL 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 2011 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8500 900 E12F006 P 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 UL Listed USA amp Canada Suitable for use in Class Division 2 Groups A B C D Hazardous Locations or Nonhazardous Locations only 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 soeed 12Mbps Default or low speed 1 5Mbps Wide Ambient Operation from 40 to 70 C 40 to 158 F 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
6. ice 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 connector 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 introduce earth ground to the isolated side WARNING EXPLOSION HAZARD Do not disconnect equipment unless power has been removed or the area is known to be non hazardous WARNING EXPLOSION HAZARD Substitution of any components may impair suitability for Class l Division 2 WARNING EXPLOSION HAZARD The area must be known to be non hazardous before servicing replacing the unit and before installing 1 Connect B type plug square connector to PC connect side of the USB Isolator Acromag Ea 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 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
7. ripheral is drawing too much The USB isolator will not provide current for the isolator 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 Email sales acromag com http www acromag com USB lIsolator User s Manual Case Material Plastic non conductive UL 94 HB flammability rating SPECIFICATIONS Dimensions 2 40 Length x 1 85 Wide x 0 925 High i 60 96mmx46 99mmx23 495mm Enclosure and Physical 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 soeed 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 UL Listed USA amp Canada suitable for use in Class Agency Approvals Division 2 Groups A B C D Hazardous Locations or Nonhazardous Locations only EMC CE Marked Electromagnetic Compatibility EMC CE marked per EMC Directive 2004 108 EC Immunity per BS EN 61000 6 1
8. s is an optional procedure to change the data rate of the USB ISOLATOR to high speed Changing USB Speed 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 will 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 Troubleshooting POSSIBLE CAUSE POSSIBLE FIX The power LED does not light up when plugged into USB port USB port Replace cable Cannot communicate with device connected through the Isolator Your computer does not support the peripheral Your device does not support Try changing internal jumpers to low 12Mbps speed see page 5 You do not have the speed set Verify internal jumpers are BOTH set identically for each side to the same speed The LED is ON and the peripheral is powered but the computer will not prompt me to indicate the device is connected 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 Press the reset connection button on device the USB isolator If this does not work try replugging the cable plug in my device but the power LED is blinking and the computer will not prompt me that a device is connected Pe
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