17394 Converter, USB to DB9 Pin (Male) RS-232

Overview

The 17394 is a six-foot interface cable fitted with a USB connector on one end and a 9-pin pin (male) RS-232 connector on the other end. The USB connector attaches to the USB port of a PC. The RS-232 connector attaches to the RS-232 port of a data logger or peripheral, such as an MD485 Multidrop Modem or RF401-series Spread-Spectrum Radio. Alternatively, the RS-232 connector can attach to an SC32B interface, which attaches to the CS I/O port of a data logger via the SC12 cable.

Images

Specifications

Cable Diameter 4 mm (0.2 in.)
Cable Length 2 m (6 ft)
Dimensions
  • 6.6 x 4.0 x 2.3 cm (2.75 x 1.7 x 0.9 in.) for 9-pin connector
  • 5.5 x 1.6 x 0.9 cm (2.17 x 0.7 x 0.4 in.) for USB connector
Weight 73 g (2.6 oz)

Compatibility

Computer Operating Systems

  • Cables that shipped after February 20, 2013 use the FTDI chip set and are all black in appearance. These cables are compatible with Windows XP, Vista, 7, 8, 10, and Mac OS X.
  • Cables that shipped before February 20, 2013 use the Prolific chip set and have a clear and metallic appearance. These cables are NOT compatible with Windows 8 and above.

Devices

The 17394 is compatible with any device that has an RS-232 port. It can also connect to the data logger's CS I/O port via the SC32B interface, and connect to some peripherals via the SC532A interface.

Downloads

USB to Serial Driver (FTDI Chip Set) v.2.12.36.4 (2.15 MB) 08-07-2021

This driver is for the CB-FTDI USB to Serial cable (CSI Part# 17394 - Black Cable). Support is for Windows XP/Vista/7/8/10/11 32 & 64 bit.  This driver is not compatible with the SC-USB Interface.

Note: Install the driver before plugging the cable into your computer.  Once the driver has been installed, plug the cable into the computer to finish the installation.

Retired - USB to Serial Driver (Prolific Chip Set) (7.98 MB) 21-09-2012

This driver is for the SBT-USC6K USB to Serial cable (CSI Part# 17394 - Silver Cable). Support is for Windows XP/Vista/7.  This driver is not compatible with Windows 8 and above or the SC-USB Interface.

Note: Install the driver before plugging the cable into your computer.  Once the driver has been installed, plug the cable into the computer to finish the installation.

Related FAQs

Number of FAQs related to 17394: 5

Expand AllCollapse All

  1. What is the pin connection between USB and DB9 (RS-232) connectors?

    A USB-to-serial cable has electronic components in it to interface the USB to the RS-232. There is no pin correlation between USB and DB9.

  2. How is communication achieved through a datalogger CS I/O port?

    Communication through the datalogger’s CS I/O port requires an interface that converts the computer’s RS-232 voltage levels to the CMOS levels of the datalogger. Typically, that interface is an SC32B. The SC32B connects to the datalogger’s CS I/O port via an SC12 or serial cable and connects to a computer’s 9-pin serial port via a serial cable. When the computer does not have a serial port, a 9-pin serial-to-USB cable, such as pn 17394, can be used with the SC32B. Alternatively, instead of the SC32B, use the SC-USB.

  3. If a laptop does not have any serial ports, how can LoggerNet talk to the datalogger?

    Use a USB to RS-232 cable (sometimes called a USB-to-serial-adapter cable) to connect either an SC32B or an SC-USB to the computer. Although any USB to RS-232 cable should work with the appropriate drivers, there is a better chance of success using the USB to RS-232 cables sold by Campbell Scientific.

  4. If a computer does not have a serial port, how can the SC32B be used to connect to the datalogger?

    There are several options:

    1. Use the SC-USB connector/interface instead of the SC32B.
    2. Use the SC32B with a pn 17394, USB-to-9-Pin Male RS-232 Cable.
    3. Use a user-supplied USB interface with the SC32B.

    If the datalogger being used has an RS-232 port, only a serial cable is needed. It is not necessary to use the SC32B unless there is another device connected to the RS-232 port or there are concerns about low-level noise from a permanently connected, ac-powered computer.

  5. What might cause error messages such as “transaction failure” and “unreachable destination” when trying to connect a datalogger and a PC using a serial or USB to RS-232 cable?

    Some possible causes include the following:

    • The result of a hardware condition in the datalogger or the port driver
    • Incorrect USB drivers (Even if the correct drivers have been successfully installed, the errors may still be related to the cable.)
      • Note: Not all USB-to-serial cables are the same. Although any USB to RS-232 cable should work with the appropriate drivers, there is a better chance of success using the USB to RS-232 cables sold by Campbell Scientific. Cables that are not purchased from Campbell Scientific have not been tested and may result in errors when connecting to a datalogger. Furthermore, USB-to-serial cables with the FTDI chipset are easier to use and seem to perform better than cables with the Prolific chipset.
    • Power supply or grounding issues on the datalogger
    • The port configuration of the datalogger (If the datalogger RS-232 port is configured at a fixed baud rate other than 115200, it might cause the error messages.)

    The Device Configuration Utility, under its Unknown device type, has an Identify Logger Type button. This button will attempt to identify the device type, protocol, or both used for the datalogger and will attempt to do so at various baud rates. If the datalogger is synchronized with a different baud rate or is set up at a fixed baud rate, this feature may provide the means of determining what baud rate should be used for successful communication. 

Visit the FAQ Library