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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
iOptron RS232-RJ9 Serial Cable

iOptron RS232-RJ9 Serial Cable

by iOptron
SKU IOP-8412
$25.00 - $25.00
$25.00
$25.00 - $25.00
$25.00
Price Match Policy!
  • Connects PC RS232 Serial Port to an iOptron Mount
  • Enables Direct Mount Control via ASCOM
  • Required for Mount and Hand Controller Firmware Updates
  • Standard RJ9 and RS232 (DB9) Connectors
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • iOptron RS232-RJ9 Serial Cable

    This is the official iOptron RS232-RJ9 serial cable, providing the essential physical link between a computer and your iOptron mount. It allows for direct communication, enabling firmware updates for the GoToNova hand controller and mount control boards. This connection is also the foundation for PC-based telescope control, allowing you to interface your mount with planetarium software and ASCOM drivers.

    The Essential Link for PC Control and Firmware Updates

    To keep your iOptron mount operating with the latest features and tracking improvements, firmware updates are critical. This cable connects your mount's RJ9 serial port directly to a computer's legacy RS232 (DB9) serial port, allowing the iOptron update utility to communicate with the hardware.

    Beyond maintenance, this cable unlocks the full potential of computerized telescope control. By connecting your mount to a PC, you can use the ASCOM platform to automate imaging sessions with software like N.I.N.A. or Sequence Generator Pro, or slew to targets directly from planetarium programs like Stellarium and Cartes du Ciel. Note that modern computers without a native serial port will require a separate, high-quality USB-to-RS232 adapter to use this cable.

  • What is the iOptron RS232-RJ9 Serial Cable used for?

    The iOptron RS232-RJ9 cable is used for two primary purposes: firmware updates for the mount and hand controller, and direct PC control of the mount using planetarium software or ASCOM-compliant imaging applications.

    Do I need this iOptron cable to update the firmware on my mount?

    Yes, for most iOptron mounts, this specific cable is required to connect the mount's RJ9 port to a computer's serial port to perform firmware updates. Using an incorrect cable can fail to establish a connection or potentially damage the mount's electronics.

    My computer doesn't have a serial port. Can I still use the iOptron RS232-RJ9 cable?

    Yes, but you will need an additional accessory. If your computer only has USB ports, you must use a high-quality USB-to-RS232 (DB9) adapter. The adapter creates a virtual COM port on your computer, which you then connect this iOptron cable to.

    Will this cable allow me to control my iOptron mount with software like Stellarium or N.I.N.A.?

    Yes. This cable provides the physical connection needed for software control. Once connected (with a USB-to-Serial adapter, if necessary), you will need to install the appropriate iOptron ASCOM driver on your PC. This driver allows applications like Stellarium, Cartes du Ciel, or N.I.N.A. to communicate with and control your mount.

    Is this the same cable that connects the hand controller to the iOptron mount?

    No, it is not. The cable that connects the hand controller to the mount is typically a coiled cable with RJ9 or similar connectors on both ends. This RS232-RJ9 cable is specifically for connecting the mount (or hand controller port) to a computer's serial port.

    How do I connect the iOptron RS232-RJ9 cable to control my CEM40 for imaging the Orion Nebula (M42)?

    To control your iOptron CEM40, you connect the RJ9 end of this cable to the serial port on the mount. The other end (RS232) connects to your computer or a USB-to-Serial adapter. After installing the iOptron Commander and ASCOM driver, you can use your preferred planetarium or imaging software to slew to M42 and begin your imaging sequence.

  • Connector 1 RS232 (DB9 Female)
    Connector 2 RJ9
    Compatibility iOptron mounts with RJ9 serial port

    • iOptron RS232-RJ9 Serial Cable

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  • iOptron 2-Year Limited Warranty