Port Electrical Specifications - CyberData 010845 Operation Manual

POS peripheral
According to the USB 2.0 specification, devices attached to a USB interface should enumerate from
caveat
the Hub's USB Vbus, regardless of the PoweredUSB powered ports. Some POS devices do not
comply with this specification, and will not enumerate unless the upper sections of the PoweredUSB
ports are active.
When running on operating systems such as Windows XP with no devices attached (an empty Hub),
the operating system turns the Hub off. The operating system does not detect non-compliant
peripherals when they are hot-plugged into an empty Hub. Consequently PoweredUSB power is not
supplied to the peripheral. In this case, you can restore correct operation as follows.
1. Unplug the Host side connection for five seconds, and then plug it in again.
2. Be sure that at least one USB device is plugged in when the computer is booted, or leaves
3. Plug in a standard USB compliant device, such as a mouse or keyboard.
4. Disable the low-power, standby operation. With this configuration, power is always supplied to

2.5 Port Electrical Specifications

The CyberData 4-Port PoweredUSB 2.0 Hub adheres to the USB 2.0 electrical specifications as
follows:
Standard USB Each lower portion of the PoweredUSB port provides +5V @ 500mA. If more than 500mA are drawn
lower A supply from a port, that port goes into USB over current, the +5 volts is turned off, and the condition is
reported to the host according to USB 2.0 specifications.
PoweredUSB
The listed maximum currents depend on the selected power supply. Both the +12V and +24V
supply PoweredUSB ports are protected with active over current circuits. If an over current condition occurs,
unplug the DC connection, remove the overcurrent condition, and re-cycle the DC connection to the
Hub by unplugging it, and then plugging it in again.
•
•
Operations Guide
standby mode.
the PoweredUSB ports regardless of the PC's operational state. For more information, contact
CyberData as instructed in
+12V Ports (3) – 1.5A each
+24V Port (1) – 2.3A
Section B.3, "Contact Information".
930105E
Installing and Using the 4-Port PoweredUSB Hub
Port Electrical Specifications
CyberData Corporation
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