SC-USB USB to CS I/O Opto-Isolated Interface Revision: 1/12 C o p y r i g h t © 2 0 0 4 - 2 0 1 2 C a m p b e l l S c i e n t i f i c , I n c .
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Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-2342.
SC-USB Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction..................................................................1 2. Technical Specifications.............................................2 2.1 2.2 2.3 2.4 USB Specifications...................................................................................2 CS I/O Port Specifications.......................................
SC-USB Table of Contents Figure 1-1. Most of the components shipped with the SC-USB ...............................
SC-USB USB to CS I/O Opto-isolated Interface The SC-USB is designed to allow Campbell Scientific dataloggers to communicate directly with computers fitted with a USB interface. It provides an isolated connection which can also operate at higher speeds than conventional RS-232 connections. 1. Introduction The SC-USB is optically isolated thus preventing possible noise pickup associated with PC power supplies and ground connections.
SC-USB USB to CS I/O Opto-isolated Interface FIGURE 1-1. Most of the components shipped with the SC-USB. SC12 cable and ResourceDVD not shown. 2. Technical Specifications 2.1 USB Specifications • USB Version 1.1 • USB transfer rate up to 12 MBits/second • Active current consumption less than 85 mA (current drawn from PC) • Standby current consumption less than 18 mA (current drawn from PC) • 17648 Cable Description: 6 ft (1.8 m) length; USB Type A male to Type B male. 2.
SC-USB USB to CS I/O Opto-isolated Interface • PC software compatibility PC200W, PC400, LoggerNet, RTDAQ and most other packages that support virtual serial ports. • Active current consumption less than 19 mA (current drawn from datalogger). • Quiscent current consumption less than 80 µA (current drawn from datalogger). 2.3 General Specifications • Height: 0.8 in (2 cm) Width: 1.6 in (4 cm) Length: 3.0 in (7.5 cm) • Weight: 3.
SC-USB USB to CS I/O Opto-isolated Interface 3.1.1 Windows 7 Connect the SC-USB to a spare USB port on your PC. If there is an available internet connection, Windows 7 will silently connect to the Windows Update website and install any suitable driver it finds for the device. If no suitable driver is found automatically, you will see a message similar to this... ...if so, use the following procedure to update the driver.
SC-USB USB to CS I/O Opto-isolated Interface Once the control panel appears, click ‘Hardware and Sound’... Now click ‘Device Manager’...
SC-USB USB to CS I/O Opto-isolated Interface In the Device Manager you will see ‘SC-USB USB TO CS I/O INTERFACE’ listed under ‘Other Devices’ with a yellow warning symbol to indicate a problem as there is no driver installed yet. Right click on ‘SC-USB USB TO CS I/O INTERFACE’ and click on ‘Update Driver Software’ in the menu that appears...
SC-USB USB to CS I/O Opto-isolated Interface You will now be given the choice to search automatically or browse for driver software. Click the second option ‘Browse my computer for driver software’... In the window that appears, browse for the location where the new drivers are stored. This could be a CD drive or a folder on your computer, then click ‘Next’...
SC-USB USB to CS I/O Opto-isolated Interface You will probably now be presented with the following window indicating that the publisher can’t be verified, click ‘Install this driver software anyway’ to continue... The installation will then proceed and you will see the progress as follows...
SC-USB USB to CS I/O Opto-isolated Interface Once this part of the installation is complete you will see the following confirmation... ...click ‘Close’ to return to the Device Manager. You will now see ‘SC-USB USB TO CS I/O ISOLATED INTERFACE’ displayed under Universal Serial Bus controllers (as shown below).
SC-USB USB to CS I/O Opto-isolated Interface You will now notice a new device ‘USB Serial Port’ displayed under ‘Ports (COM & LPT), again with a yellow warning symbol as now driver is yet installed... Right click on ‘USB Serial Port’ and click on ‘Update Driver Software’ in the menu that appears...
SC-USB USB to CS I/O Opto-isolated Interface You will now be given the choice to search automatically or browse for driver software. Click the second option ‘Browse my computer for driver software’... In the window that appears, browse for the location where the new drivers are stored. This could be a CD drive or a folder on your computer, then click ‘Next’...
SC-USB USB to CS I/O Opto-isolated Interface You will probably now be presented with the following window indicating that the publisher can’t be verified, click ‘Install this driver software anyway’ to continue... The installation will then proceed and you will see the progress as follows...
SC-USB USB to CS I/O Opto-isolated Interface Once this part of the installation is complete you will see the following confirmation... ...click ‘Close’ to return to the Device Manager. You will now see ‘SC-USB USB TO CS I/O ISOLATED INTERFACE (COMx)’ displayed under Ports (COM & LPT), where x is the number of the COM port assigned by Windows during the installation. The installation is now complete. You can close the Device Manager and start using your SC-USB interface.
SC-USB USB to CS I/O Opto-isolated Interface 3.1.2 Windows Vista To install the drivers on a Vista PC you will need administrative rights or access to the administrator password during the installation process. Make sure you have the latest driver set (post-March 2008) which includes formal Vista support. To start the installation, plug the SC-USB into a free USB port. The found new hardware wizard will start and show this screen. Select the first option as shown.
SC-USB USB to CS I/O Opto-isolated Interface If you are installing from a CD insert it now. If the PC does not find the drivers or if you are installing them from copy on your hard disk, select “Show me other options” and choose the browse option to point to the directory holding the drivers. You will then get this message: The drivers supplied are Microsoft WHQL certified by the SC-USB chipset manufacturer (FTDI); however, changing the descriptor to SC-USB prevents windows validating the drivers.
SC-USB USB to CS I/O Opto-isolated Interface The process of installing the drivers should then complete and show this screen. Shortly after, a message will normally appear from the device installation icon in your toolbar as follows: Take note of the COM port that the SC-USB has been installed as, COM4 in this case. You need to know this number when setting up the interface in Campbell Scientific software. Click on close to the two options above to finish. You are now ready to use the interface.
SC-USB USB to CS I/O Opto-isolated Interface 3.1.3 Windows 2000/XP Use the USB cable to connect your SC-USB device to the PC’s USB port. The first time that this is done, the ‘Found New Hardware Wizard’ screen will normally be displayed, as shown below for XP (Windows 2000 screens may not be identical to these). Select ‘No, not this time’ and Press ‘Next’ and you will see the following screen.
SC-USB USB to CS I/O Opto-isolated Interface If installing from CD, you can select the automatic option; if you are installing from another source, then you may need to select the second option and specify the root directory which contains the driver files, e.g. After selecting next the installation will pause with this message: Select ‘Continue Anyway’ as the drivers are based upon Microsoft WHQL drivers from FTDI (www.ftdichip.com). Only company names and identifiers have been changed.
SC-USB USB to CS I/O Opto-isolated Interface The Wizard will then continue through a number of steps, e.g. Rather than completing it will appear to restart the installation again as the ‘Found New Hardware Wizard’ appears again. This is not an error. Windows first installs the USB drivers and then the virtual serial port drivers. You need to follow the same steps as above again, until finally you get to this screen. If you subsequently change the device ID (see Section 3.
SC-USB USB to CS I/O Opto-isolated Interface 3.1.4 Windows 98/98SE/ME Use the USB cable to connect your SC-USB device to the PC’s USB port. The first time that this is done, the ‘Building Driver Information Database’ screen followed by the ‘Add New Hardware Wizard’ screen will normally be displayed, as shown below. (If it is not displayed immediately, try rebooting the PC with the SC-USB plugged in or run the Add New Hardware option in the Control Panel.
SC-USB USB to CS I/O Opto-isolated Interface Select ‘Search for the best driver….’ and click ‘Next’. You will then see the screen shown below. Select the appropriate location; if using the supplied CD, the driver letter should be your CD-ROM drive. For Windows 98 or ME you must specify the subdirectory “win98me”, as above, otherwise the installer will try to install the XP drivers from the default directory which will not work.
SC-USB USB to CS I/O Opto-isolated Interface NOTE In most cases the above process will be repeated as Windows first installs the USB interface controller and then the virtual serial port driver. Let Windows search for the serial driver in the same directory as sthe USB driver. The installation process will only need to be carried out once. 3.1.5 Uninstalling the SC-USB Drivers To uninstall the drivers use the standard Windows procedure. Go to the Windows ‘Control Panel’ and select ‘Add/Remove Programs’.
SC-USB USB to CS I/O Opto-isolated Interface As shown below the com port number is shown at the end of the description. In some cases a PC program may not offer the SC-USB COM port in its selection list of available COM ports. Recent versions of Campbell Scientific packages allow you to manually type the COM port into the selection window to overcome this. Older software may also limit you only up to COM4.
SC-USB USB to CS I/O Opto-isolated Interface 3.2 Set-up Modes – the SC_USB Programming Utility The Set-up button on the SC_USB.exe utility allows you to configure the SC-USB interface to work with the supported dataloggers and peripherals and their modes of operation. Before pressing the Set-up button, ensure that the correct COM port is selected. NOTE This program is only needed for some older dataloggers or datalogger operating systems.
SC-USB USB to CS I/O Opto-isolated Interface 3.2.1.2 Selecting a Fixed Baud Rate Bit rate selections available are 9600, 19200, 38400, 57600, 76800 and 115200 baud as shown in the screenshot above. Select the highest rate supported by the dataloggers being used. 3.2.1.3 Enable All Comms Modes (Automatic Mode Detection) Selecting ‘Enable all Comms Modes’ automatically connects to the datalogger using the communications method that uses the least physical hardware resources.
SC-USB USB to CS I/O Opto-isolated Interface 3.2.1.7 Enable ME Comms Mode Selecting ‘Enable ME Comms Mode’ will force the SC-USB to only respond as a modem-enabled device. This would only be used when all other connection modes are being used by other peripherals or for compatibility with an older datalogger or operating system. 3.2.1.8 Set ID Set ID is used to make the SC-USB interface unique. This is useful if you have more than one SC-USB interface connected to the same PC at the same time.
SC-USB USB to CS I/O Opto-isolated Interface port, select the new COM port number assigned to the SC-USB (see Section 3.1.6), and then press Connect. 4.2.2 Downloading a Datalogger OS The SC-USB can be used to download operating systems to the CR510, CR10X, and 23X dataloggers using this tool. The SC-USB must be set to a fixed baud rate and this baud rate must match DevConfig.
SC-USB USB to CS I/O Opto-isolated Interface these cases the SC-USB needs to be set to a fixed baud rate. This can either be done using the SC-USB utility program (see Section 3.2) or if your software package supports it; for example by using the ‘Generic modem’ option of LoggerNet, the baud rate can be set by sending a single character code at the start of each call to the datalogger. The codes are shown in the table below.
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