USER GUIDE SC-USB USB to CS I/O Opto-isolated Interface Issued: 17.12.13 Copyright © 2003-2013 Campbell Scientific Ltd.
Guarantee This equipment is guaranteed against defects in materials and workmanship. This guarantee applies for twelve months from date of delivery. We will repair or replace products which prove to be defective during the guarantee period provided they are returned to us prepaid.
PLEASE READ FIRST About this manual Some useful conversion factors: Area: 1 in2 (square inch) = 645 mm2 Length: 1 in. (inch) = 25.4 mm 1 ft (foot) = 304.8 mm 1 yard = 0.914 m 1 mile = 1.609 km Mass: 1 oz. (ounce) = 28.35 g 1 lb (pound weight) = 0.454 kg Pressure: 1 psi (lb/in2) = 68.95 mb Volume: 1 UK pint = 568.3 ml 1 UK gallon = 4.546 litres 1 US gallon = 3.
Contents 1. Introduction ................................................................ 1 2. Technical Specifications ............................................ 2 2.1 USB Specifications ................................................................................... 2 2.2 CS I/O Port Specifications ........................................................................ 2 2.3 General Specifications .............................................................................. 3 3.
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 RS232 connections. SC-USB Interface (supplied with 2m A-B USB cable) 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 provided – see Section 4. This utility can also be used to upgrade the SC-USB’s own operating system. Refer to Section 4 if using a 21X, CR7, CR10X-TD or CR23X-TD datalogger, using call-back, or when upgrading a datalogger operating system using the CSOS or Device Configuration programs utility. Please check with Campbell Scientific if you wish to use the SC-USB with a CR9000X.
User Guide 2.3 General Specifications Case Size 20x40x75mm (HxWxL) Cable Length 1.5m, fitted with a Type A connector for connection to a computer Weight 85g Operating temperature range -25°C to +50°C EMC compliance: complies with EN61326:1998 (see Section 5.3) Driver support for Windows 2000, XP / Vista / Windows 7/ Windows 8 supplied on CD (Contact Campbell Scientific for other drivers) Set-up utility and manual included on CD 3.
SC-USB USB to CS I/O Opto-isolated Interface A separate installer program will start if you have selected the appropriate driver set for your copy of Windows. After clicking on Next the drivers will be installed and the program should complete with this screen at which point you can close the installer and the CD program (unless you wish to use the utility or view the help or manuals). Once this step has been reached click on “Finish” and then you can proceed to connect the SC-USB to your computer. 3.
User Guide 3.2 Fixing a failed installation/upgrading the drivers If you have not installed the drivers prior to plugging in the SC-USB then, depending on the version of Windows that you have, the installation will either fail with no option to search for the drivers or it will fail and ask for a disk to be installed. In the latter case you can insert the SC-USB driver disk in the computer and then browse to the CD and let Windows install the drivers from the CD.
SC-USB USB to CS I/O Opto-isolated Interface You will then be prompted as to whether to search for the driver or browse the computer. If the driver installation as shown in Section 3 above worked OK, you can select the first option and the new drivers already installed on the machine should be found OK. If not then browse to the CD and see if Windows will pick up the drivers from there.
User Guide 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). 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...
SC-USB USB to CS I/O Opto-isolated Interface Right click on ‘USB Serial Port’ and click on ‘Update Driver Software’ in the menu that appears... You will now be given the choice to search automatically or browse for driver software. If previously installed OK, click on Search... or if it was not OK browse to the CD to point to the drivers. The installation will then proceed and you will see the progress as follows...
User Guide 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.
SC-USB USB to CS I/O Opto-isolated Interface The installation is now complete. You can close the Device Manager and start using your SC-USB interface. 3.3 Uninstalling the SC-USB Drivers To remove the drivers start the device manager screen (see 3.2 above). With the SC-USB plugged in you will see it listed under Ports. Right-click on its entry and select the uninstall option, selecting the option to delete the files if required. You can then unplug the SC-USB.
User Guide 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. In that case you would need to free a lower com port numbers (by deinstalling an unused COM port) and move the assignment of the SC-USB.
SC-USB USB to CS I/O Opto-isolated Interface tool in LoggerNet you need to Add a Root device, select the COM port option and select the relevant com port number which has the SC-USB identifier; then Add the datalogger or Pakbusport directly to the new ComPort.
User Guide 4.1 Settings 4.1.1 Auto Detect (Automatic Baud Rate Detection) Auto Detect will try to connect at the highest asynchronous baud rate the datalogger can support. This can be used in most cases. The exceptions are: Upgrading a datalogger operating system - see Section 4.3 below. Using Call Back, when you must fix the baud rate. Using a 21X or CR7 datalogger, where the baud rate needs to be fixed and set to either 9600 or 76800 baud (OS dependent).
SC-USB USB to CS I/O Opto-isolated Interface sessions. It is currently supported by Pakbus dataloggers and recent versions of the CR5000 operating system. 4.1.6 Enable SDC Comms Mode Selecting ‘Enable SDC Comms Mode’ will force the SC-USB to only respond as an SDC communication device at address 9. In this mode asynchronous communication is used at the chosen bit rate. The Modem Enable line (pin 5) is not used and is free for other use.
User Guide 5. Troubleshooting 5.1 Installation If when installing the SC-USB the Hardware installation wizard is not displayed immediately try rebooting the PC with the SC-USB plugged in or run the Add Hardware option in the Control Panel. If the wizard still does not appear it is possible that drivers are already installed for the SC-USB – check using the Device Manager. The SC-USB uses a chipset made by FTDI. Many other USB devices also use this chipset.
SC-USB USB to CS I/O Opto-isolated Interface Scientific became aware that many PCs have poor filtering of emissions from their USB ports. These emissions become apparent when a cable is plugged into the USB port, as the cable acts as an antenna. If any such PC emissions (coming from the SC-USB cable) cause problems with other equipment, you may be able to reduce such noise by adding a clip-on ferrite choke to the SC-USB cable. Position the choke on the cable close to the USB connector.
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