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USB to Serial Gateway
For use with RS485 Industrial Interfaces and
Maritime IEC 61162-2 connections
Create a safe serial port connection to an RS485 network or an IEC61162-2
compliant marine connection that may be on a different power circuit.
Provide a fully compliant RS485 port from a USB port
Receive low level differential signals that are too small to be received directly
by a PC serial port
User Manual
USG-1-B-485
Issue 1.04
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Summary of Contents for Actisense USG-1-B-485
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Page 1: User Manual
USB to Serial Gateway User Manual USG-1-B-485 For use with RS485 Industrial Interfaces and Maritime IEC 61162-2 connections Issue 1.04 Create a safe serial port connection to an RS485 network or an IEC61162-2 compliant marine connection that may be on a different power circuit. -
Page 3: Table Of Contents
USB to Serial Gateway - USG-1-B-485 Contents Important Notices Notices Foreword Introduction RS485 & IEC61162-2 USG-1 solutions Solution #1 - Ground loops Solution #2 - Different standards Solution #3 - PC has no serial port Features Software updates RS485 Interfacing... -
Page 4: Important Notices
Actisense RS485 & IEC61162-2 website (www.actisense.com). The port provided by the USG-1-B-485 will be referred Active Research Limited will not be liable for infringement throughout the document as “RS485” although the of copyright, industrial property right, or other rights of a... -
Page 5: Usg-1 Solutions
Actisense, that is isolated to 1500 volts - say goodbye to ground loop issues! 2. The PC crashes intermittently as ground currents flow across its sensitive electronic circuitry. This can ISO-Drive allows a completely “floating”... -
Page 6: Rs485 Interfacing
“no echo”. Note: When opening the USG-1-485 case, be aware Actisense produces a full range of products to solve many that the circuitry inside is not 100% protected against marine and other interfacing requirements. -
Page 7: Usg-1 Connections
USB to Serial Gateway - USG-1-B-485 USG-1 connections Figure 1 – Inside the USG-1 case Figure 1 shows an internal view of the USG-1 Printed Both sets of connections provide connections: ‘+/ Circuit Board (PCB). The USG-1 has screw-terminal A’, ‘-/B‘. This allows the USG-1-485 to interface to “Phoenix”... -
Page 8: Connecting Devices
The shield Actisense USG-1-485 data cable. When using the connection of these wires should be connected at supplied cable, simply use the colours indicated to the instrument end only to prevent ground loops. -
Page 9: Connecting To A 3-Pin Rs485 Listener Or Talker (Iec 61162-2)
(either receive only, or transmit only, but not both). It is therefore, highly recommend to use an Actisense USG-1-422 model instead, using the RS232 connections detailed in that user manual. This method will allow full bi- directional isolated connection to a PC RS232 port. -
Page 10: Usb Driver Installation
Linux kernels from v2.4.20 and onwards. However, Actisense has not been able to test the compatibility of the USG-1 with USB and this driver. For MAC OS 8, 9, and X please contact Actisense for details (refer to the Company Information section). - Page 11 ‘Finish’ to complete the wizard, and wait for the ‘USB Drivers’ directory on the Actisense CD. ‘Found New Hardware Wizard’ to appear again. 4. The ‘Actisense USB Serial Converter’ driver is not This second wizard will guide you through the ‘USB Serial Port’ driver installation.
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Page 12: Usb Configuration
2. Click on ‘Device Manager’ and expand the ‘Ports (COM & LPT)’ list by clicking on the ‘+’ sign next to it. You will find the ‘Actisense USG’ in the list, followed by the allocated COM port number. © 2009 Active Research Limited... - Page 13 USB to Serial Gateway - USG-1-B-485 3. Double click on the port icon for the ‘Actisense USG’ and the port properties window will appear. Click on the ‘Port Settings’ tab. Here you can set the default settings for the USG-1 device. It is not necessary to change the default settings here - as each software program will define these settings itself.
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Page 14: Troubleshooting Guide
1 minute before reconnecting the USG-1 to the RS485 network. If the error persists, the USG-1-485 unit should be returned to Actisense (refer to Company Information section). Please contact Actisense before returning the unit in order to obtain a Returns Number. -
Page 15: Specifications
USB to Serial Gateway - USG-1-B-485 Specifications Parameter Conditions Min. Max. Unit Supply Supply voltage From USB port 4.75 5.25 Supply voltage = 5v (no load) Supply current drawn from USB port Supply voltage = 5v (output shorted) RS485 Transceiver Input / Output Logical ‘1’... -
Page 16: Company Information
BH12 3PF Telephone: 01202 746682 (International : +44 1202 746682) Fax: 01202 746683 (International : +44 1202 746683) Actisense on the Web: For advice, support and product details E-mail: support@actisense.com Website: www.actisense.com “Actisense” is a registered trademark of Active Research Limited.
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