Contemporary Controls ARCNET USB22-485 User manual

USB22 Series
ARCNET
®
Network Interface Modules with USB Interface
INSTALLATION GUIDE
INTRODUCTION
The USB22 Series of ARCNET Network Interface Modules (NIMs)
links Universal Serial Bus (USB) computers with the ARCNET Local
Area Network (LAN). USB has become popular for connecting desktop
or laptop computers to peripherals because of its very high-speed interface
(up to 480 Mbps) and its convenience of a powered exterior interface with
no need to open the computer.
Each USB22 includes a COM20022 ARCNET controller that can
support data rates up to 10 Mbps and a microcontroller to transfer data
between the ARCNET and either USB 2.0 or USB 1.1 devices. The NIM
is powered from a computer USB port or a USB hub. Models exist for
the most popular ARCNET physical layers.
A USB cable and a disk with software for Windows
®
2000/XP/Vista is
also provided. When a USB cable first connects the NIM to a machine
using Windows 2K/XP/Vista and you are prompted for a driver, use the
USB driver provided on the CD-ROM. Follow the instructions provided
by Windows to install this driver. If Windows reports that this driver has
not been tested, just select “continue” and complete the installation.

SPECIFICATIONS
Electrical
Current demand: 400 mA (max)
Environmental
Operating temperature: 0°C to +60°C
Storage temperature: –40°C to +85°C
Humidity: 10% to 95%, non-condensing
ARCNET Data Rates
Shipping Weight
1 lb. (.45 kg)
Compatibility
ANSI/ATA 878.1
USB 1.1 and USB 2.0
Regulatory Compliance
CE Mark
CFR 47, Part 15 Class A
LED Indicators
ARCNET Activity — green
USB — green
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RJ-45 Connector Pin Assignments
4000 485 TB5
4 Line Line – Line –
5 Line Line + Line +
(All other pins are unused.)
Figure 1 — RJ-45 Connector
Mechanical (The case dimensions shown below are valid for all
models.)
Figure 2 — USB22-CXB Dimensions
ELECTROMAGNETIC COMPATIBILITY
All USB22 models comply with Class A radiated and conducted
emissions as defined by EN55022 and CFR 47, Part 15. This equipment
is intended for use in non-residential areas.
Warning
This is a Class A product as defined in EN55022. In a domestic
environment this product may cause radio interference in which case the
user may be required to take adequate measures.
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INSTALLATION
SOFTWARE
Driver installation instructions are provided in the readme file located on the
disk that accompanies the product.
INDICATOR LIGHTS
ARCNET: This LED will flash green in response to any ARCNET
activity.
USB: This LED glows green so long as a valid active USB
connection exists to an attached computer.
FIELD CONNECTIONS
The USB22 is available in four models that vary by transceiver type for
connecting to an ARCNET LAN via a particular kind of cable. Each
model’s transceiver is identified by the suffix (-4000, -485, -CXB or -
TB5) separated from the main number by a hyphen.
-CXB Coaxial Bus
Generally two types of coaxial cables are used with ARCNET:RG-62/u
and RG-59/u. RG-62/u is recommended because it matches the 93-ohm -
CXB impedance and can thus achieve the maximum 1000-foot segment
distance. Although RG-59/u does not match the -CXB impedance (it is
75-ohm cable), it will still work but the segment length may be limited.
Never attach coax cable directly to the USB22-CXB; always use the
provided BNC “T” connector. The “T” connector allows the coaxial bus
to continue as shown with device A in Figure 3. Apply the provided 93-
ohm BNC terminator to the “T” if the USB22 terminates the coax in an end-
of-line situation as shown with device B in Figure 3.
Figure 3 — Possible Connections for the USB22-CXB
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-TB5 Twisted-pair Bus
The -TB5 transceiver accommodates twisted-pair cabling via a pair of
RJ-45 jacks which allow the unit to be daisy-chained at any location on
the bus segment Usually IBM type 3 unshielded twisted-pair cable
(UTP) is used, but shielded cable (STP) can also be used to provide
continuous shielding between devices.
When the USB22-TB5 is located at the end of a bus segment, Apply the
provided 100-ohm terminator to the empty RJ-45 jack to match the cable
impedance.
-485 DC-Coupled EIA-485
Dual RJ-45 jacks are provided for each DC-coupled EIA-485 segment.
A DC-coupled segment can be up to 900 feet of IBM type 3 (or better)
STP or UTP cable, and as many as 17 nodes can occupy a segment.
Make sure the phase integrity of the wiring remains consistent
throughout the network. All phase A signals on NIMs and hubs must
connect together. The same applies to phase B. Refer to Figure 1 for
connector wiring.
Termination
When the USB22-485 is located at the end of a bus segment, apply the
provided 100-ohm terminator to the empty RJ-45 jack.
Bias
Bias must also be applied to the network to prevent the differential
receivers from assuming invalid logic states when the signal line is
floated. Bias is provided on the USB22-485 by a set of 806-ohm pull-up
and pull-down resistors. Refer to the existing NIM user manual for a
discussion of bias requirements.
Ground
All devices on the segment should be referenced to the same ground
potential to achieve the common mode voltage (+/–7 Vdc) required for
the EIA-485 specification. A ground connection is not provided by the
USB22-485. It is assumed adequate grounding is supplied by the
existing equipment. Refer to the existing equipment user manual for a
discussion of grounding requirements.

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-4000 AC-Coupled EIA-485
The AC-coupled EIA-485 transceiver offers advantages over the DC-
coupled version. No bias adjustments are needed and wiring polarity is
unimportant. Much higher common mode voltage levels can be achieved
with AC coupling because the transformer coupling has a breakdown
rating of 1000 VDC.
However, AC-coupling also has disadvantages. AC-coupled segments
are shorter (700 feet max) and are limited to 13 nodes compared to 17 for
DC-coupling. Also, AC-coupled transceivers operate only at 1.25, 2.5,
5.0 and 10 Mbps, whereas DC-coupled transceivers function over all
standard data rates.
Cabling rules for USB-4000 are similar to those for USB-485. Wire nodes
in a daisy-chain fashion. Refer to Figure 1 for connector pin
assignments. Termination should only be applied to a device located at
the two ends of the segment. Do not mix AC-coupled and DC-coupled
devices on the same segment; however, bridging the two technologies is
possible with active hubs that have appropriate transceivers.

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NEED MORE HELP INSTALLING THIS PRODUCT?
Technical documents, software drivers and utility programs can be
downloaded from www.arccontrol.com. When contacting one of our
offices by telephone, ask for Technical Support.
Warranty
Contemporary Controls (CC) warrants this product to the original purchaser for two years
from the product shipping date. Product returned to CC for repair is warranted for one
year from the date the repaired product is shipped back to the purchaser or for the
remainder of the original warranty period, whichever is longer.
If the product fails to operate in compliance with its specification during the warranty
period, CC will, at its option, repair or replace the product at no charge. The customer is,
however, responsible for shipping the product; CC assumes no responsibility for the
product until it is received.
CC’s limited warranty covers products only as delivered and does not cover repair of
products that have been damaged by abuse, accident, disaster, misuse, or incorrect
installation. User modification may void the warranty if the product is damaged by the
modification, in which case this warranty does not cover repair or replacement.
This warranty in no way warrants suitability of the product for any specific application.
IN NO EVENT WILL CC BE LIABLE FOR ANY DAMAGES INCLUDING LOST
PROFITS, LOST SAVINGS, OR OTHER INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT
EVEN IF CC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES,
OR FOR ANY CLAIM BY ANY PARTY OTHER THAN THE PURCHASER.
THE ABOVE WARRANTY IS IN LIEU OF ANY AND ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR USE, TITLE
AND NONINFRINGEMENT.
Returning Products for Repair
Before returning a product for repair, contact Customer Service. A
representative will instruct you about our return procedure.
Contemporary Control Systems, Inc.
2431 Curtiss Street
Downers Grove, Illinois 60515 USA
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
WWW: http://www.ccontrols.com
Contemporary Controls Ltd
Sovereign Court Two, UWSP
Sir William Lyons Road
Coventry CV4 7EZ UK
Tel: [phone]
Fax: [phone]
E-mail: [email protected]

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Manufacturer: Authorized Representative:
Contemporary Control Systems, Inc.
2431 Curtiss Street
Downers Grove, IL 60515 USA
Contemporary Controls Ltd
Sovereign Court Two, UWSP
Sir William Lyons Road
Coventry CV4 7EZ UK
Type of Equipment:
Industrial local area network hub
Models: USB22-485
USB22-4000
USB22-CXB
USB22-TB5
I, the undersigned, hereby declare that the products specified above
conform to the listed directives and standards.
George M. Thomas, President March, 2009
DECLARATION OF CONFORMITY
Applied Council Directives:
Low Voltage Directive 2006/95/EC
General Product Safety Directive 2001/95/EC
Electromagnetic Compatibility Directive, 2004/108/EC
Restriction of Hazardous Substances Directive 2002/95/EC
Waste Electrical and Electronic Equipment Directive 2002/96/EC
Standards to which Conformity is Declared
EN 55022:1998 + A1:2000 + A2:2003, Class A, Limits and Methods of Measurement
of Radio Disturbance Characteristics of Information Technology Equipment
EN 55024:1998 + A1:2001 + A2:2003, Information Technology Equipment —
Immunity Characteristics — Limits and Methods of Measurement