Rockwell Automation 1784-U2DHP User Manual

Installation Instructions

USB-to-Data Highway Plus Cable

Catalog Number 1784-U2DHP

Topic Page

Important User Information 2
Environment and Enclosure 3
Install the Cable 5
Configure the DH+ Node Address 11
Consider the Traffic Analyzer Software 11
About Using Multiple Cables 12
Status Indicators 13
Specifications 15
Additional Resources 18

About the Cable

The 1784-U2DHP USB-to-Data Highway Plus Cable lets you connect a
computer to a Data Highway Plus (DH+) network via an unused USB port on
the computer. You can also use the cable to connect the computer to PLC-5
processors (except for Classic PLC-5 processors, such as PLC-5/10, PLC-5/12,
PLC-5/15, and PLC-5/25) or SLC 5/04 processors. Communication on the
DH+ link requires the RSLinx Classic software DF1 serial 1770-KF2/1785-KE
drive.

2 USB-to-Data Highway Plus Cable

Important User Information

Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls
(Publication SGI-1.1

http://www.rockwellautomation.com/literature/

solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

available from your local Rockwell Automation sales office or online at

WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death,
property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions help you identify
a hazard, avoid a hazard and recognize the consequences.

SHOCK HAZARD: Labels may be on or inside the equipment, for example, drive or motor,
to alert people that dangerous voltage may be present.

) describes some important differences between

BURN HAZARD: Labels may be on or inside the equipment, for example, drive or motor,
to alert people that surfaces may reach dangerous temperatures.

IMPORTANT Identifies information that is critical for successful application and understanding of the

product.

Rockwell Automation Publication 1784-IN045C-EN-P - May 2010

Environment and Enclosure

ATTENTION: This equipment is intended for use in overvoltage

Category II applications (as defined in IEC 60664-1), at altitudes
up to 2000 m (6562 ft) without derating.

This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR 11. Without appropriate precautions, there
may be difficulties with electromagnetic compatibility in residential
and other environments due to conducted and radiated disturbances.

This equipment is supplied as enclosed equipment. It should not
require additional system enclosure when used in locations
consistent with the enclosure type ratings stated in the Specifications
section of this publication. Subsequent sections of this publication
may contain additional information regarding specific enclosure type
ratings, beyond what this product provides, that are required to
comply with certain product safety certifications.

In addition to this publication, see:

USB-to-Data Highway Plus Cable 3

• Industrial Automation Wiring and Grounding Guidelines, Rockwell
Automation publication 1770-4.1
requirements.

• NEMA Standard 250 and IEC 60529, as applicable, for
explanations of the degrees of protection provided by different types
of enclosure.

, for additional installation

Preventing Electrostatic Discharge

ATTENTION: This equipment is sensitive to electrostatic

discharge, which can cause internal damage and affect normal
operation. Follow these guidelines when you handle this
equipment:

• Touch a grounded object to discharge potential static.

• Do not touch connectors or pins on component boards.

• Store the equipment in appropriate static-safe packaging when not

in use.

Rockwell Automation Publication 1784-IN045C-EN-P - May 2010

4 USB-to-Data Highway Plus Cable

IMPORTANT

USB Cable

0.61 m (2 ft)

8-pin DIN Cable

2.44 m (8 ft)

Communication
Rate Switch

Status Indicators

At the end of its life, this equipment should be collected
separately from any unsorted municipal waste.

The cable will not connect to Classic PLC-5 processors, such as
PLC-5/10, PLC-5/12, PLC-5/15, and PLC-5/25, without an adapter.
An adapter can be purchased separately from third-party
companies.

To comply with the CE Low Voltage Directive (LVD), this
equipment must be powered from a source compliant with safety
extra low voltage (SELV) or protected extra low voltage (PELV).

The 1784-U2DHP cable replaces both the 1784-PCMK communication card
and 1784-PCM6 cable (for computers without PCMCIA slots).

Rockwell Automation Publication 1784-IN045C-EN-P - May 2010

USB-to-Data Highway Plus Cable 5

IMPORTANT

IMPORTANT

The cable operates at DH+ communication rates of 57.6 Kbps, 115.2 Kbps, and

230.4 Kbps.

The DH+ communication rate is read only when power is applied.
To change the communication rate, you must disconnect the cable
from the USB port, use the Communication Rate switch to change
the communication rate setting, then reconnect the cable to the
USB port.

The 1784-U2DHP cable supports these DH+ network cable lengths.

DH+ Communication Rate Max. DH+ Network Cable Length

57.6 Kbps 3048 m (10,000 ft)

115.2 Kbps 1524 m (5000 ft)

230.4 Kbps 762 m (2500 ft)

Install the Cable

Follow the procedures on the following pages to install the cable.

Obtain the Device Driver for the Cable

Follow these steps to download the device driver for the cable.

If RSLinx Classic software, version 2.53 or later, is installed on the
computer, the device driver is already installed on the computer.
Skip this section.

1. Visit http://www.rockwellautomation.com/support/pccards

.

2. Click the 1784_u2dhp.inf file.

3. Save the file to a directory on the computer on which you want to install

the cable.

Rockwell Automation Publication 1784-IN045C-EN-P - May 2010

6 USB-to-Data Highway Plus Cable

TIP

TIP

Connect and Configure the Cable

1. Insert the end of the cable having the USB connector into an unused
USB port on a computer.

The Found New Hardware wizard appears.

If you do not see the Found New Hardware wizard, the drivers
have already been installed. If RSLinx Classic software, version

2.53 or later, is installed on the computer, the device driver was
installed at C:\Program Files\Rockwell
Software\RSLINX\PnP_Drivers\1784-U2DHP.

If you do not see the Found New Hardware wizard, proceed to

. Otherwise, continue with the next step.

step 9

2. Select No, not this time and click Next.

3. Select Install from a list or specific location and click Next.

4. Select Search for the best driver.

5. Check only the Include this location checkbox.

6. Browse to the location where you saved the 1784_u2dhp.inf file and

click OK.

7. Click Next.

8. Click Finish.

If you see a Microsoft Windows error message that displays
code 10, disconnect the cable from the USB port, then reconnect
the cable to the USB port, so that the Windows operating system
recognizes the device.

Rockwell Automation Publication 1784-IN045C-EN-P - May 2010