Advantech BB-USR604 User manual

MODEL BB-USR604
4 PORT USB ISOLATED SERIAL CONVERTER
USER MANUAL

This product was designed and manufactured using domestic and imported parts by:
Advantech B+B SmartWorx - Americas
707 Dayton Road
Ottawa, IL 61350 USA
Phone [phone]
Fax [phone]
www.advantech-bb.com
[e-mail]
©2020 Advantech. All rights reserved. Information in this manual is subject to change without notice, and does not represent a commitment
on the part of Advantech. Advantech assumes no responsibility for errors that may appear in this document. Advantech shall not be liable for
incidental or consequential damages resulting from the furnishing, performance or use of this manual.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photography,
recording or any information storage and retrieval system without written consent.
Other brands or product names used in this manual may be registered trademarks and the property of their respective owners. The use of
trademarks or other designations in this publication is for reference purposes only and does not constitute an endorsement by the trademark
holder.
Documentation Number: BB-BB-USR604_2320m

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TABLE OF CONTENTS
Table of Contents......................................................................................................................................3
Section 1...................................................................................................................................................5
Overview..........................................................................................................................................................5
Safety ...............................................................................................................................................................5
Product Feature Summary...............................................................................................................................6
About this Manual ...........................................................................................................................................6
Section 2...................................................................................................................................................7
Product Information ........................................................................................................................................7
USB to Serial converter....................................................................................................................................7
Package Contents ............................................................................................................................................7
Typical Applications / Modes of Operation .....................................................................................................7
Section 3...................................................................................................................................................9
Quick Start Guide.............................................................................................................................................9
Section 4.................................................................................................................................................11
Software Installation .....................................................................................................................................11
Installing the Driver .......................................................................................................................................11
Un-Installing the Driver .................................................................................................................................13
Section 5.................................................................................................................................................15
Hardware Installation ....................................................................................................................................15
Installing and Mounting the BB-USR604 .......................................................................................................16
Connecting Power .........................................................................................................................................16
Connecting to a PC.........................................................................................................................................17
Connecting to the Serial Ports .......................................................................................................................17
Termination and Biasing ................................................................................................................................18
Setting COM Port Operating Modes..............................................................................................................19
LED Indicators ................................................................................................................................................20
Section 6.................................................................................................................................................21
Advanced User Settings.................................................................................................................................21
Setting Serial Port Properties ........................................................................................................................22
Advanced Settings in Device Manager ..........................................................................................................23
Modbus Basics ...............................................................................................................................................24
Section 7.................................................................................................................................................27
Specifications.................................................................................................................................................27

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Product Specifications ...................................................................................................................................28
Certifications..................................................................................................................................................29
BB-USR604 Dimensions .................................................................................................................................31
Panel Mount Dimensions ..............................................................................................................................32
Section 8.................................................................................................................................................33
Appendix........................................................................................................................................................33
Loopback Test................................................................................................................................................33
Serial Port Wiring...........................................................................................................................................36
Index.......................................................................................................................................................39

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SECTION 1
OVERVIEW
1
IN THIS SECTION
Safety................................................................
................
Product Feature Summary ................................
..................
About This Manual ................................
.............................
The BB-USR604 is an industrial grade, four port, isolated USB to serial converter. It enables any host USB port to
provide multiple RS-232, RS-422 or RS-485 two or four-wire serial interfaces.
The BB-USR604 converter supports USB 2.0 high-speed data rates of 480 Mbps. The upstream and downstream
sections are isolated to 2000 Volts. Industrial features such as a rugged metal case, versatile mounting options,
high ESD protection, wide temperature ranges, and high retention USB connectors set this device apart from other
USB to serial converters.
Figure 1: USR602 USB to Serial Converter
SAFETY
All safety related regulations, local codes and instructions that appear in the literature or on equipment must be
observed to ensure personal safety and to prevent damage to either the instrument or equipment connected to it.
If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment
may be impaired.

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PRODUCT FEATURE SUMMARY
•4 port converter
•Easy to install
•2 kV port-to-port isolation
•High retention USB connector
•Rugged metal case
•DIN rail or panel mount options included
•8 kV contact, 15 kV air ESD surge protection
•Wide temperature range (-40 to +80 °C)
•USB 2.0 and 1.1 compatible
•LEDs indicate power and port status
•Includes 2 meter USB cable
•Redundant power inputs (10 to 48 VDC) via terminal block or locking barrel jack
•Drivers for Windows 2000 and up (including 64-bit variants)
•RS-232, RS-422, RS-485 two-wire and RS-485 four-wire interfaces
•Modbus support
ABOUT THIS MANUAL
The content of this manual has been designed to be used by personnel who have a basic understanding of
computer systems and peripherals, data communications, serial communications protocols (RS-232/422/485), and
basic electronics.

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SECTION 2
PRODUCT INFORMATION
2
IN THIS SECTION
BB-USR604................................................................
........
Package Contents................................
...............................
Typical Applications / Modes of Operation
............................
.
BB-USR604: USB TO SERIAL CONVERTER
•BB-USR604 – Four-port Isolated USB to Serial Converter
PACKAGE CONTENTS
•BB-USR604 Isolated USB to Serial Converter
•Driver CD
•2 meter USB cable
•Panel mount adapters
•DIN rail mount adapter
•Printed quick start guide
TYPICAL APPLICATIONS / MODES OF OPERATION
•Addition of serial ports to PCs
•Conversion of USB serial connection to:
•RS-232
•RS-422
•RS-485 two-wire
•RS-485 four-wire

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SECTION 3
QUICK START GUIDE
The following Quick Start Guide outlines the basic steps to get your BB-USR604 converter up and running:
1.Check for included items:
•4 port industrial USB to serial converter
•Driver CD
•Two meter USB cable
•Panel mount adapters
•DIN rail mount adapter
•Printed quick start guide
2.Install the driver software (see "Installing the Driver" on page 11)
•The CD contains a driver installation program. Install the drivers before connecting the converter to
your PC.
•Put CD into drive. The installation program should launch automatically.
•Follow the prompts.
3.Mount the converter (DIN rail or panel mount)
•DIN rail mount
•Locate the DIN rail kit
•Mount on back of converter using screws
•Clip to a DIN rail
•Panel mount:
•Locate the panel mount kit
•Mount brackets to converter using screws
•Mount in panel
4.Connect power (see "Connecting Power" on page 16):
•Connect 10 to 48VDC to terminal block and/or barrel jack.
5.Check LED Indicators (on page 22)
•Power indicated by green Pwr LED
•Tx and Rx LEDs will indicate when data present
6.Set up the COM Port operating modes (see "Setting COM Port Operating Modes" on page 19)

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•Configure the DIP switches for each port to select one of the following:
•RS-232 (both DIP switches Off)
•RS-422 (both DIP switches On)
•RS-485 4-wire (SW1 Off, SW2 On)
•RS-485 2-wire (SW1 On, SW2 Off)
7.Connect the serial ports (see "Connecting to the Serial Ports" on page 17):
•Connect from the DB-9M connectors on the converter to your devices or network:
•To connect to an RS-232 DTE device, use a null modem (crossover) cable.
•To connect to an RS-485 two-wire network, refer to RS-485 Two-Wire Connections (on page 37).
•To connector an RS-422 device, or an RS-485 four-wire network, refer to RS-422 and RS-485
Four-Wire Connections (on page 38).
8.Configure the serial ports (see "Advanced Settings in Device Manager" on page 23).
•On the PC screen, open the Control Panel.
•Click System to open the Device Manager.
•Under Ports, double-click the port to be configured.
•On the Serial Port Properties window, set the required communications parameters of the system
with which you are communicating.
•If necessary, click Advanced and set up the Advanced Properties (refer to manual for information).
9.Perform a loopback test to verify that the converter is working.
•Refer to the Loopback Test (on page 33) section.

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SECTION 4
SOFTWARE INSTALLATION
3
IN THIS SECTION
Installing the Driver................................
............................
Un-Installing the Driver ................................
......................
.
Do not connect the converter to your PC until the Driver is installed. The driver is contained on the CD included
with the converter. It is installed using an executable program. This program must be run on your PC before
connecting the converter to your USB port.
INSTALLING THE DRIVER
Insert the CD into your CD ROM Drive. The driver installation software should automatically start. If not, browse
the CD and double click on the “setup.exe” file. The following dialog box will appear.
Figure 2: Run setup.exe dialog
1.Click Next. The license agreement dialog box will appear.

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Figure 3: End User License Agreement
2.Click Next. The program will install the drivers on your computer and the installation complete screen will
appear.
Figure 4: Installation Complete Screen
3.When the installation is complete you can plug in the USB to Serial Converter. When you do this, the COM
ports will be assigned. It may take up to 30 seconds to make the COM port assignments the first time
you plug in the converter.
4.The driver software is now installed.

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5.To verify that the communication port has been configured:
a. Open the Control Panel.
b. Click System to open the System Properties dialog box.
c. Select the Hardware tab.
d. Click Device Manager to open the Device Manager dialog box.
e. Expand Ports (COM & LPT)
USB Isolated Serial Port should be listed as one of the COM ports.
UN-INSTALLING THE DRIVER
To un-install the driver for the BB-USR604 converter:
1.Open the Control Panel.
2.Click System to open the System Properties dialog box.
3.Select the Hardware tab.
4.Click Device Manager to open the Device Manager dialog box.
5.Expand Ports (COM & LPT)
USB Isolated Serial Port should be listed as one of the COM ports.
6.Right-click the COM port listing for the converter (USB Isolated Serial Port)
The following dialog box appears.
Figure 5: Installation Complete Screen
7.Click OK.
The COM port listing for the converter disappears.

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SECTION 5
HARDWARE INSTALLATION
4
IN THIS SECTION
Installing and Mounting the BB-USR604
...............................
Connecting Power ................................
..............................
Connecting to a PC................................
.............................
Connecting to the Serial Ports................................
.............
Termination and Biasing................................
.....................
Setting COM Port Operating Modes ................................
.....
LED Indicators ................................................................
...
Hardware installation includes mounting the device, connecting power, connecting to a PC, connecting to serial
devices and configuring the serial ports. LEDs indicate the presence of power and communications signals on the
ports.
Figure 6: BB-USR604
.

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INSTALLING AND MOUNTING THE BB-USR604
The BB-USR604 converter comes supplied with DIN rail mounting clips and panel mount adapters.
Figure 7: DIN Rail Mounting Clip
The DIN rail mounting clip is attached to the back of the unit using three machine screws (included). This mount
enables the unit to be clipped directly to a standard DIN rail.
Figure 8: BB-USR604 with Panel Mount Adapters
Panel mount adapters are attached to the unit with three machine screws on each side. Using this mount, the unit
can be installed in a panel. (Refer to dimensional diagrams for the dimensions required for predrilling the panel.)
CONNECTING POWER
The BB-USR604 converter offers three options for connection of power:
•USB bus powered
•External power via pluggable terminal strip - 10 to 48 VDC, 16 Watts, maximum.
•External power via locking power jack - 10 to 48 VDC, 16 Watts, maximum.

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Figure 9: Power Supply Connections
When the unit is USB powered, the current available to the converter may be limited by the USB host. If the
converter is connected to an external USB hub the maximum available current may be insufficient to operate the
converter. In that case an external power supply should be connected.
CONNECTING TO A PC
The BB-USR604 converter connects to a host device (PC) via a USB interface. The connector on the BB-USR604
converter is a high retention force Type B female connector.
Figure 10: USB Connector
CONNECTING TO THE SERIAL PORTS
The BB-USR604 provides four serial ports. DB-9M connectors are used for RS-232, RS-422 and RS-485 two-wire and
four-wire connections.
Figure 11: DB-9M Serial Port Connectors

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The following illustration shows the pin numbering of the DB-9M connector.
Figure 12: DB-9F Pin Numbering
The following table shows the wiring pin-outs for RS-232, RS-422 and RS-485 two-wire and four-wire connections.
Pins RS-232 (DTE) RS-422/RS-485 (4-wire) RS-485 (2-wire)
1
Data Carrier Detect (DCD)
RDA(-)
---
2
Receive Data (RD)
RDB(+)
---
3
Transmit Data (TD)
TDB(+)
DATA B(+)
4
Data Terminal Ready (DTR)
TDA(-)
DATA A(-)
5
Signal Ground (GND)
GND
GND
6
Data Set Ready (DSR)
---
---
7
Request To Send (RTS)
---
---
8
Clear To Send (CTS)
---
---
9
Not Used
---
---
TERMINATION AND BIASING
The BB-USR604 converter includes internal biasing resistors on the RS-422/RS-485 interfaces.
The values for internal biasing resistors are:
Biasing: 1k Ohms (default IN PLACE when in RS-422/485 modes)
The biasing resistors are connected to the receive lines, pulling the RDA(-) line to ground and the RDB(+) line to a
positive voltage. The bias resistor is automatically IN when you select RS-422/485 mode.
For additional information on termination and biasing download the RS-442 and RS-485 Applications eBook from
www.advantech.com or contact Technical Support at Advantech B+B SmartWorx: 1 [phone] (Central Time-
USA)

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SETTING COM PORT OPERATING MODES
The operating modes of the converter are configured by the positions of DIP switches accessible on the BB-USR604
enclosure. The DIP switches are located on the top of the enclosure near the power connectors (when the unit is
positioned vertically).
•Switches 1 and 2 configure Port 1.
•Switches 3 and 4 configure Port 2.
•Switches 5 and 6 configure Port 3.
•Switches 7 and 8 configure Port 4.
Figure 13: BB-USR604 DIP Switch and Power Connectors
Operating modes are RS-232, RS-485 two-wire half-duplex, RS-485 four-wire full-duplex, and RS-422.
Port Switch RS-232 RS-422 RS-485
4-wire
RS-485
2-wire
Port 1 1 Off (down) On (up) Off (down) On (up)
2 Off (down) On (up) On (up) Off (down)
Port 2 3 Off (down) On (up) Off (down) On (up)
4 Off (down) On (up) On (up) Off (down)
Port 3 5 Off (down) On (up) Off (down) On (up)
6 Off (down) On (up) On (up) Off (down)
Port 4 7 Off (down) On (up) Off (down) On (up)
8 Off (down) On (up) On (up) Off (down)

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LED INDICATORS
The BB-USR604 converter includes nine LED indicators. One LED indicates the presence of Power; the others
indicate Transmit and Receive data present on each port.
Figure 14: BB-USR604 LED Indicators
LED Function Color Indicates
Power Green Presence of power
Port 1 Rx Blinking Green Data being received on Port 1
Port 1 Tx Blinking Yellow Data being transmitted on Port 1
Port 2 Rx
Blinking Green
Data being received on Port 2
Port 2 Tx Blinking Yellow Data being transmitted on Port 2
Port 3 Rx
Blinking Green
Data being received on Port 3
Port 3 Tx
Blinking Yellow
Data being transmitted on Port 3
Port 4 Rx
Blinking Green
Data being received on Port 4
Port 4 Tx
Blinking Yellow
Data being transmitted on Port 4

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SECTION 6
ADVANCED USER SETTINGS
5
IN THIS SECTION
Setting Serial Port Properties ................................
..............
Advanced Settings in Device Manager ................................
.
Modbus Basics ................................................................
...
.
Serial port parameters and other advanced settings are configured on the USB Isolated Serial Port Properties and
Advanced Settings windows, which are accessible via the Device Manager. The Device Manager can be accessed
through the Windows Control Panel.
Figure 15: Device Manager

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SETTING SERIAL PORT PROPERTIES
1.In Device Manager, expand Ports and double-click USB Isolated Serial Port to open the USB Isolated Serial
Port Properties dialog box.
Figure 16: Port Properties
2.In the dropdown lists provided, select the following serial port properties required for your
communications application:
•Bits per second
•Data bits
•Parity
•Stop bits
•Flow control
Note: The default values for this dialog are 9600 bps, 8 data bits, No parity, 1 stop bit, No flow control.