Question about Belkin ExpressBus (F5U021) 4-Port USB Hub

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USB hub not working?

What is the switch labeled 'Bus' and 'Self' used for? What position should it be in? Can I pull out a USB cable out of my computer, plug it into th ehub and have everything work? Thank you

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  • pswolak May 21, 2009

    Thank you very much. I knew about the power considerations but since all my usb devices have their own power supplies, it did not occur to me that this might be the problem.
    Thanks again,

    Peter


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When you get USB devices, some have their own power, like a plug-in hard drive, and some get their power from the host, like jump drives. My USB scanner gets power from the host, but if you plug it into a USB hub, it sucks the power from the host. Too many of those devices and the scanner fails, so they suggest you don't plug it into a hub.

Here's where the BUS and SELF switch come in. Somewhere, there is a 6v DC power supply that either came with your Belkin or is optional. If you use it, and put the switch on SELF, you don't have to worry about what you plug into the ports. If you don't care, or don't have the power supply, you can put the switch on BUS, but be aware that not all USB devices you plug into the hub will work, or a combination of two devices may not work.

Carl

Posted on May 21, 2009

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Ultra SuperSpeed USB


usb speeds b> A USB, or Universal Serial Bus, is the brainchild of Intel developer Ajay Bhatt. USB is useful for transmitting data and power to devices. USB cables are widely used in 2010 to connect computers to such devices as printers, cameras and flash drives. While the USB port was initially developed for computers, it has become standard for video game consoles, smart phones, PDAs; it can also function as power cords for these devices.
Unit Load Capacity
USB comes in 1.0, 2.0 and 3.0 versions. Each provides between 4.75 and 5.25 volts (V) of power that travels between one wired line. Various devices may draw this amount of power from that single, wired line. A maximum of five unit loads can be drawn from a USB 2.0 port, however six unit loads can be drawn from a USB 3.0 port, making it capable of delivering more power to devices. USB devices are configured to support a minimum of 100 milliamps (mA) times the number of powered ports it contains (200mA for one port, 300mA for two ports, etc.). b> Charging Devices b> Many devices can draw power to recharge their batteries or can function off of power currents running through a USB port cord. Superspeed USB ports run off a 3.0 platform and optimize power usage to provide the minimum amount of energy the device needs to recharge or run. New powering modes allow USB ports to supply power and communication (data transfer) concurrently. A USB Charging Downstream Port can supply up to 1.5 amps (A) at low-bandwidth transfer rates and 900mA at high bandwidth rates. A portable device such as a phone or PDA can draw up to 1.8 A from a Dedicated Charging Port on a USB 2.0 or higher device. In 2009, major cell phone manufacturers like Nokia, Motorola and Samsung agreed upon a standard, universal micro-USB charger for all their phones. In time, this will eliminate the need for manufacturers to provide charging cables with their phones. This micro-USB device has been adopted by the International Telecommunication Union as its universal mobile phone charger solution. When a device requires more power than can be delivered by a single USB port, that device may be charged with a multi-ported USB. External hard drives, for example, can be powered by a USB cable that connects to an external power supply on one end and to a device on the other. b> Powered USB b> A powered USB is a self-powered USB that uses additional power lines than standard USB ports to deliver more electrical current to a device. It uses four extra pins to supply 6 A at either 5 V, 12 V or 24 V to attached devices. Powered USBs are used to power retail devices like barcode scanners, printers, pin pads and signature capture devices. These USBs consist of two ports: a top one which accepts a USB cable and a bottom one which accepts a power cord. The powered USB allows devices to draw more power from a USB and not require an external power source to operate.
USB Power Options
b> According to Everythingusb.com, the Universal Serial Bus (USB) is a concept that was originally designed as a connection for smartphones to computers in the 1990s. Since then, the USB has evolved from the older USB 1.0 and 2.0 designs to the faster USB 3.0 model, which is also called the "Superspeed USB." A benefit of USB is that it can be used to power devices without requiring any additional power cables or plug packs.

Low-Power USB
Low-power USB devices typically consume 100 milliampere or less from the USB bus. This is called a single-load unit. USB 1.0 and 2.0 devices have a single-load unit of 100 milliampere, and for the newer USB 3.0, the single-load unit is redefined to 150 milliampere. Low-power USB devices can be plugged into any USB host or hub port. Low power bus powered devices use the so-called "V bus" pin to draw its power and run on a voltage of between 4.40 volts up to 5.25 volts. A low drop-out regulator is required for most 3.3 volt devices. b> High-Power USB b> High-power USB 2.0 devices consume between 101 milliampere and 500 milliampere (1 to 5 load units) to run on. USB 3.0 supports power consumption of up to 900 milliampere (6 load units). These devices can be plugged in to any USB port, but if you are using a USB hub, the device will only be able to draw 100 milliampere unless the hub is self-powered. High-power USB devices run on a minimum of 4.40 volts. b> Self-Powered USB b> Two types of self powered USB devices exist: true self-powered devices that rely completely on their own power supply, and hybrid self-powered devices that also draw some current from the USB bus. Hybrid self-powered USB devices typically draw up to one load unit from the bus and use their own external source for the rest of their power. Most of these devices have a safety feature to ensure that they don't try to draw more power from the bus, should the external source fail. High Speed USB Port Since 2002, Microsoft has supported high-speed USB ports in the Windows XP operating system. Prior to 2002, computers and operating systems used the USB 1.1 standard, with its 12Mbps maximum data transfer rates. USB 2.0, also known as "Hi-Speed," pushes the maximum data transfer speed to 480Mbps. To take advantage of the higher speeds, you'll need to install a USB 2.0 card in your computer. In most cases, desktop users will need to install an internal card, while laptop users with PC Card or ExpressCard slots may install external cards.
Purchase an internal USB card or internal USB drive bay. Shut down your computer. Remove all cables and peripheral devices. Remove the left side panel (when facing the front of the case). Remove any screws or adjust any latches. The method of removing your side panel will vary according to the type of case you have. If you are unsure of how to remove your side panel, see your case or computer documentation. Attach the anti-static wrist bracelet's clip to a metal object. Strap the bracelet to your wrist. Locate an empty card slot. Remove the card slot cover by unscrewing the screw and lifting the cover, if applicable. Line up the hardware with the slot to ensure that you are inserting it in the correct direction. Insert the card into the slot until you hear a click. Do not force the card. Remove it if you're having problems. Then line up the card with the slot again and try to insert it again. Secure the card into the slot with the slot cover screw you removed earlier. Replace the side panel. Screw in any screws you removed earlier. Attach all cables and peripheral devices to your computer. Restart the computer. Windows will automatically detect your new high-speed USB port. b> Install an External Card b> Turn on your computer. Locate an available PC Card or ExpressCard slot. Insert the card into the slot. The card will click when seated. Allow your operating system time to detect the high-speed USB port and to install the drivers required. Hope this helps.

b>

Oct 06, 2012 | Ultra Products Ultra U12-40528 SuperSpeed...

Tip

USB devices not recognised or not working properly?


Try these steps to reinitialize your usb ports on your pc

1. Unplug ALL USB devices connected to the computer. If you are using a USB mouse and keyboard, temporarily use the older type PS/2 devices if you have them, if you don't then just leave them connected.

2. Hold down the windows key and press r

3. Type devmgmt.msc into the run menu and press ok

4. Click on the + sign next to the Universal Serial Bus Controllers
71921df.jpg
5. You might need another mouse to do this if you have a usb mouse.. I recommend you get a ps2 connector mouse which goes into the green round connector in the back of your pc.
0a245dd.jpg
6. Right click and uninstall first the usb root hubs. all of them then uninstall the rest of the devices you see under Universal serial bus controllers

7. Ones you have uninstalled everything you should see the Universal serial bus controllers there at all.

8. Now go ahead and restart your pc.

9. Ones you have restarted the pc your usb ports will reinstall in a moment stand by while it installs all of them. If you get warning messages click ok or continue installation.

10. Now go ahead and plug the usb devices back in. Install software if required, all usb devices if not faulty or broken should work now. Also note the error code if you get one?

This solution doesn't fix all usb problems so if you have a yellow ! mark there and device status reports a error code. Then it might not be a problem with your usb ports.

Thank you for reading, do leave suggestions, comments, feedback below.
Ekse


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on May 04, 2008 | Microsoft Windows XP Home Edition

1 Answer

I have a model m01517 5 port usb hub. It has 2 usb cables to the computer, do I use the blue or black connector? I can only get one port to recognize a device plugged in the other four seem to be dead,...


Not sure I understand this hub either. Looks like only one port is a USB 2.0 port, but here is a snippet from the manual......

This iConcepts USB Hub provides the electronic interface between USB devices and the host, It allows up to five USB devices or Hubs to connect an upstream USB Hub or Host port.

Features
• One USB 2.0 port
• 4 Port USB 1.1 and support high speed (480 mbps) and 4 port full speed (12 mbps) operations.
• The USB 2.0 port can operate both USB 2.0 & 1.1 Devices
• USB 2.0 port supports self powered mode and bus - powered mode, indicated by a powered LED .
• Over current detection and protection


Manual is provided here: http://www.sakar.com/p-1124.aspx?categoryid=182

Sep 09, 2010 | Sakar (M01517) 5-Port USB Hub

2 Answers

Where is the port for a computer hookup


The USB port is hidden inside the unit. For pictures see here: http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faq/000000/000500/000057/faq000557_002.html?reg=us&c=us&lang=en&prod=mfc240c_all&Cat=2

Use the plastic tabs on the sides of the machine to lift the scanner cover up until it locks in the open position. Behind the control panel on the front, the USB cable port on the right (sort of in a ditch). Route the USB cable through the trench and out the back of the printer. Then connect the other end of the cable to the computer. (direct connections are preferred, self-powered USB hubs usually can work. Bus powered hubs often can not send the scanner data properly.)

I hope this helps.

Cindy Wells

Apr 18, 2010 | Brother Multi-Function Center MFC-240C...

1 Answer

My computer will not recognize the pandidgital photolink scanner


Try attaching the scanner directly to the computer. If this works, the problem is obviously in the hub. Many scanners will not work if attached to a bus-powered hub. If you have a self-powered (with a power transformer) hub, double check that the power transformer is working (it should be warm).

I hope this helps.

Cindy Wells

Dec 25, 2009 | PANDIGITAL Office Equipment & Supplies

1 Answer

MANUAL FOR KEYBORD 5188


Type 5C Keyboard to USB Adapter
Operation Manual
Type 5C Keyboard to USB Adapter 5188
TYPE 5C KEYBOARD TO USB ADAPTER Page 1

This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance
with the instruction manual, may cause interference to radio communications. It has been tested and found to
comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15
of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a residential area is likely to cause
interference, in which case the user at his own expense will be required to take whatever measures may be required
to correct the interference.
Contents
Chapter Page
1. Specifications 2
2. Introduction 3
3. Installation 3
4. Technical notes 3
5. Part Numbers and Accessories 4

1. Specifications Compatible with:
Sunä Type 5C keyboard and mouse (includes Sun Type 6 keyboard)
Ultra Spec Server Control Switch, P/N 5185 or 5195
Sun Sunblade 100 workstation
USB compliant PC workstations (a USB compliant operating system which supports the USB HID 1.1
device class specification is required)
Power:
USB bus powered device. Current load is 100 mA max (adapter only). If also powering Type 5C keyboard
and mouse requires an additional 400mA max.
Size:
4.0” x 2.4” x 1.0”
Shipping Weight:
1 lbs.
Warranty:
Ultra Spec Cables, Inc. warrants all hardware and components of the Type 5C Keyboard to USB Adapter,
with proper installation and normal use, for one year from the date of purchase.
During the warranty period, Ultra Spec Cables, Inc. will, at its option, either repair or replace hardware and
components that prove to be defective.
If your product should fail during the warranty period, phone our technical support department at 1-800-
622-2537 for warranty service (return to factory) instructions.
TYPE 5C KEYBOARD TO USB ADAPTER Page 2

Ultra Spec Cables, Inc.
2. Introduction
The Type 5C Keyboard to USB Adapter (P/N 5188) allows a USB compatible workstation to be connected to the
Server Control Switch (P/N 5185 or 5195). The adapter converts keyboard scan codes from the type 5C keyboard to
equivalent USB keyboard scan codes. The adapter also converts the mouse data to USB compatible mouse data.
The Type 5C Keyboard to USB Adapter can also be used in a standalone setup, where it is connected between a
Type 5C Keyboard/mouse and a USB based workstation.
3. Installation
3.1 Between Type 5C keyboard and workstation (standalone operation)
For all installations it is recommended that the equipment be powered off for system interconnection and/or changes
to a setup.
• Connect the port labeled To Type 5C Keyboard to either minidin8 connector on the Type 5C keyboard using a
straight through minidin8 cable (P/N 8002 or equivalent). If using a mouse, connect it to the other minidin8
connector on the keyboard.
• Connect the port labeled To Computer USB Port to any workstation USB port using a USB Type A to Type B
cable (P/N 4021 or equivalent). This type of cable is used for connecting a HUB or other device upstream to
another HUB or a host controller.
3.2 Between Server Control Switch and workstation (system operation)
For all installations it is recommended that the equipment be powered off for system interconnection and/or changes
to a setup.
• Connect the port labeled To Type 5C Keyboard to any Server Control switch CPU port using a straight through
minidin8 cable (P/N 8002 or equivalent).
• Connect the port labeled To Computer USB Port to any workstation USB port using a USB Type A to Type B
cable (P/N 4021 or equivalent). This type of cable is used for connecting a HUB or other device upstream to
another HUB or a host controller.
• Connect the video output of the workstation to the Server Control Switch video input connector using an
appropriate cable/converter for connector and sync conversion
• Connect and power on the rest of the Server Control Switch system per the appropriate installation instructions.
4. Technical notes
Keyboard
The Type 5C Keyboard to USB Adapter emulates a Sun Type 6 USB keyboard (P/N 3201273-01) and a Sun
Crossbow USB mouse (P/N 3703632-01). The Type 5C and Type 6 keyboards match in available keys, however
several keys are relocated on the Type 6 keyboard. The adapter appropriately maps the key codes generated to the
key legends on the keyboard (i.e. all keys work the way they are labeled).
TYPE 5C KEYBOARD TO USB ADAPTER Page 3

Ultra Spec Cables, Inc.
Important Note Regarding Standby Operation:
USB supports a SUSPEND/RESUME capability that has various and incompatible implementations across differing
hardware platforms. This can affect the operation of the adapter if the workstation supports a low power or standby
mode with an incompatible implementation. Low power or standby mode is normally activated through a menu
selection (using the mouse) or by pressing the POWER key on the keyboard (upper rightmost key on both the Type
5C and Type 6 USB keyboards). For this reason, the POWER key on the Type 5C keyboard IS DISABLED when
using the adapter. In addition, it is important not to activate low power or standby mode through other means.
WHEN IN LOW POWER OR STANDBY MODE THE SYSTEM MAY NOT WAKE UP THROUGH
KEYBOARD OR MOUSE ACTIVITY, REQUIRING A HARD POWER-DOWN TO RECOVER.
In addition, the POWER key on the Type 5C keyboard does not have the capability to power-on a system as it
would when connected to a Type 5C compatible workstation (nor does a Type 6 USB keyboard have this capability
when connected to a USB workstation).
5. Part numbers and Accessories
5188 Type 5C Keyboard to USB Adapter
4021 Cable, USB Type A/B, M/M 0.5M
4022 Cable, USB Type A/B, M/M 1M
4023 Cable, USB Type A/B, M/M 2M
4024 Cable, USB Type A/B, M/M 3M
4025 Cable, USB Type A/B, M/M 4.6M

Jul 10, 2009 | HP Multimedia Cordless Keyboard/Mouse...

2 Answers

4-port usb kvw switch #GCS634U


The GCS634U is designed and tested to work only with a standard USB keyboard and mouse. However, most wireless keyboards and mice work with it, but they cannot guarantee any specific model or brand that would work correctly.

As you can see, this KVM switch is a bus powered device (meaning it only gets power from the USB ports of the computers). If the computer cannot provide enough power for the KVM switch to function correctly, then the wireless keyboard will be affected.

You may try using the IOGEAR GKM541RA. It's tested to work with the GCS634U. Or you may also try using a self-powered USB hub (meaning, it has it's own power adapter) and connect it in between the KVM switch and the computer. That self-powered USB hub will be the one that will add up power to the KVM switch and help it to function properly.

Jan 12, 2009 | IOGear GCS634U KVM Switch

1 Answer

When connecting usb, error - hub strength exceeded


the GPS is probably trying to charge over the usb cable.
you have a few options:


1. plug the gps directly into your pc directly. shuffle some low-power device (such as a tablet or mouse) onto the hub if you don't have any free ports.

2. if you have the power supply for your hub, plug it into the hub and if there is a SELF/BUS switch on the hub, set it to SELF.

3. if you have a separate power supply for the gps, use it. if you charge the gps first by some other means (ie: the car charger), then it won't **** so much power from your hub.

Dec 31, 2008 | Tomtom ONE GPS Receiver

8 Answers

Power supply for Targus 4 hub usb 2


Most USB hubs do not need an external power supply, except when a connected USB device draws more power than the computer/laptop USB port can supply. In this case an external power supply will need to be connected to the USB hub.
Normally this would be a 5 volt power supply, but make sure the polarity on the connector matches the power connector on the hub, check the label on the hub, sometimes it states to power requirements of the hub as well as the polarity on the connector. Normally the pin on the hub's power connector is positive (ie. +5V)

Nov 13, 2008 | Targus PAUH217U 4-Port USB Hub

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