Black Box IC165AE manual Power Controls

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CHAPTER 3: Installation

3.4 Power Controls

When the hub is connected to the USB connection, it initially draws less than 1⁄10 of an amp from the host connection. Each port is enabled one at a time. Initially, all attached devices are only allowed to draw 1⁄10 amp or less each.

When the hub is identified, it tells the host whether it is bus-powered or self-powered. If the hub is bus-powered, the device driver should only allow low-power devices to be enabled. If the hub is self-powered, the device driver can allow low-power and/or high-power devices to be attached.

NOTE

Early device drivers may not enforce these power limits. However, the USB Director/4-Port Hub is designed to automatically protect the host connection and the hub itself from overcurrent conditions if they exist.

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Contents USB Director/4-Port Hub FCC and IC Statements UL Listing European Union Declaration of Conformity USB DIRECTOR/4-PORT HUB NOM Statement Trademarks Contents Specifications Maximum DevicesWatt, 5 V @ 1⁄10 amp Introduction OverviewSystem Requirements What the Package Includes Hardware Description Hub, Front and Side View, and StandTypical Application Typical ApplicationInstallation Initial CheckoutHub Mounting Cable ConnectionsCable Connections Connector Pinouts Power Controls Operation Status Indicators LED Functions Operation Troubleshooting Power ProblemsOther Problems SolutionsSolutions Solutions Solutions Calling Black Box Shipping and Packaging Page Page Copyright 2000. Black Box Corporation. All rights reserved
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