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USB Hubs
Use your PC’s USB bus to connect serial peripherals.
We have hubs for RS-232, RS-422/RS-485,
and RS-232/RS-422/RS-485 applications!
Use a USB Hub in an industrial monitoring application.
• High-speed alternatives to installing
serial boards.
• Support USB Version 1.1.
• Data rates up to 921.6 kbps.
• Plug-and-play, hot-swappable,
• Ideal for industrial applications.
• Include a 6-foot (1.8-m) USB cable.
• Compatible with Windows® 98/Me/XP
and Windows 2000.
2-Port RS-232/RS-422/RS-485
USB Hub (IC1020A)
USB Cable (Included)
RS-485 Gas Meter
RS-485 Cable
RS-422 Cable
PC with USB Port
RS-422 Programmable
Logic Computer
USB connections have replaced serial connections as the
preferred method of linking peripheral devices to computers.
Why? Because USB offers increased bandwidth, lower costs
than conventional I/O ports, and the ability to connect devices
And wouldn’t you prefer to use an external connection to
connect your serial peripherals instead of installing a PCI or
ISA card in your system? BLACK BOX® USB Hubs enable you
to do just that.
These hubs are available with two, four, or eight ports for RS232, RS-422/RS-485, or RS-232/RS-422/RS-485 communications.
No matter which model you choose, the USB Hubs enable
non-USB serial peripherals to be connected to your PC’s USB
bus while preserving serial speeds (standard PC data rates of
up to 921.6 kbps). These high-speed capabilities are the result
of the hubs’ two high-speed FIFO buffers—a 128-byte FIFO
buffer for data transmission and a 384-byte FIFO buffer for
data reception.
The hubs spare you from opening your computer case, and
they don’t require resources such as input/output (I/O) ports or
IRQs. In addition, your system doesn’t need to be USB, both in
terms of hardware and operating system.
Just think of the possible applications. Instead of plugging
factory automation devices into serial ports on a PC, you can
attach them to a hub and, in turn, connect the hub to your PC’s
USB bus. Data rates continue to transfer at serial connection
speeds through the externally attached serial devices.
The USB Hubs are ideal for connecting factory automation
devices, such as data loggers and industrial machinery, or any
device that depends on links that aren‘t affected by excessive
noise or spikes in voltage.
And, with these hubs, you not only get industrial-quality
serial connections, but automatic RS-485 data enable/disable
along with a DB9 connector that’s compatible with PCI and
ISA RS-422 products.
You don‘t need much time to connect one of the hubs,
either. These compact units connect to peripheral serial
devices in external plug-and-play fashion. And they’re hotswappable—you don‘t have to turn off your PC to install one.
Setup is easy. The hubs are shipped with drivers on a CDROM. Screen captures, including a ”new hardware found“
wizard, are used to locate the appropriate drivers and, once
they’re found, a pop-up window indicates correct installation
of the new ports and that the hub’s hardware is ready for use.
Each port on a USB Hub can be individually configured to
the RS- interface of your choice. To do this, simply adjust DIP
switches and DIP shunts.
LEDs indicate whether USB is enabled and if there’s activity
on any hub ports. Upon hub installation, you can begin the
setup utility and use the included loopback plug to check
communications between TD and RD.
When testing in loopback mode, a port LED flashes and
the interface screen displays echoed data (in the form of a hex
pattern and ASCII data strings) to verify the hub’s readiness
for use in your application.
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Technically Speaking
RS-232 defines three types of connections: electrical,
functional, and mechanical. This interface is ideal for the datatransmission range of 0–20 kbps/50 feet (15.2 m). It employs
unbalanced signalling and is usually used with DB25
connectors to interconnect DTEs (computers, controllers, etc.)
and DCEs (modems, converters, etc.).
A differential interface that defines voltage levels and
driver/receiver electrical specifications, RS-422 is typically more
immune to noise or voltage spikes that may occur on the
communication lines.
With differential interfaces, RS-422 also supports greater
drive capabilities over longer distances. It can communicate
over cabling lengths of up to 4000 feet (1219.2 m). Its signal
levels range from 0 to 5 volts.
In addition, the RS-422 serial transmission standard defines
driver and receiver electrical characteristics that enable you to put
one driver and up to nine receivers on the line at the same time.
Backward compatible with RS-422, the RS-485 interface is
used for multidrop applications.
As with RS-422, the RS-485 interface supports cable lengths
up to 4000 feet (1219.2 m). Plus, the signal levels for RS-485
are the same as those defined by RS-422. Its electrical characteristics differ in that it allows for 32 devices to be connected
simultaneously to one line.
Universal Serial Bus (USB)
Universal Serial Bus is a royalty-free bus specification
developed by leading manufacturers in the PC and telephony
industries to support plug-and-play peripheral connections.
USB offers increased bandwidth and lower costs than
conventional I/O ports.
The USB is a daisychain consisting of USB hubs and
peripherals less than 16.4 feet (5 m) apart. The USB daisychain
can support up to 127 devices. Instead of opening up the CPU
to insert new boards, you make all connections outside the
case to the USB ports.
Because USB connections are hot-swappable, you can
attach or remove peripherals without shutting down your
computer. Also, USB hubs have additional ports that enable
you to daisychain multiple devices together. Hundreds of
manufacturers of PCs, various peripherals, and software
support USB.
USB Version 1.1 supports 1.5- and 12-Mbps data rates. USB
Version 2.0 is backward compatible to Version 1.1 speeds.
Communications Chips — (2) High-speed USB-to-serial interface
(128-byte FIFO transmit, 384-byte FIFO receive)
Distance (Maximum) — RS-232: 50 ft. (15.2 m);
RS-422/RS-485: 4000 ft. (1219.2 m)
Compliance — UL® 94V0; FCC Class B, Part 15; CA classe B, CE
Standards Supported — USB Version 1.1
Operating Systems Supported — Windows 98/Me/XP, Windows 2000
Distance (Maximum) — RS-232: 50 ft. (15.2 m);
RS-422/RS-485: 4000 ft. (1219.2 m)
Speed (Maximum) — RS-232: 460.8 kbps;
RS-422/RS-485: 921.6 kbps
MTBF — >150,000 hours
Connectors — Serial: (2), (4), or (8) DB9 M (DTE);
USB: (1) Type B F
Temperature Tolerance — Operating: 32 to 158°F (0 to 70°C);
Storage: -4 to +158°F (-20 to +70°C)
Relative Humidity — 10 to 90%, noncondensing
Power — From the USB bus (as long as the device is connected directly
to a powered PC or hub)
Size — 1.5"H x 7"W x 5.3"D (3.8 x 17.8 x 13.5 cm)
✦ (1) USB Hub
✦ (1) CD that includes user’s manual plus software for
setup in Windows 98/Me/XP and Windows 2000
✦ (1) 6-foot (1.8-m) USB cable
USB Hubs
DIN Rail Mount Kit
2- and 4-Port
For optimum performance and a 20% savings, order…
USB Version 1.1 Cable,
Type A–Type B, 10-ft. (3-m)
DB9 Extension Cable (with EMI/RFI Hoods),
Foiled Shielded, 10-ft. (3-m)
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