Meilhaus Electronic Red-USB Iso User Manual
Red-USB Iso
USB-Isolator
User’s Manual
Ausgabe: May, 2011
USB-Isolator User’s Manual
2
OVERVIEW
Key Features
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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 (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, & 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.
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USB-Isolator User’s Manual
3
SHIELD
DATA-
+5V
DATA-
DATA+
GND
CURRENT
LIMITER
DATA+
GND
+5V
COMMON
MODE
FILTER
1500 VAC ISOLATION
SHIELD
PUSH
BUTTON
COMMON
MODE
FILTER
POWER
LED
PUSH-PULL
DRIVER
FROM PC
ISOLATED POWER
AND SIGNAL
USB
B-TYPE
USB
A-TYPE
TO TARGET
DEVICE
NOTE: FILTERING IS
SIMPLIFIED FOR THIS
DRAWING.
USB-ISOLATOR SIMPLIFIED SCHEMATIC
HOW IT WORKS
DIMENSIONS
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This circuit isolates USB power and data via two transformers. Input power
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.
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