USB to RJ12 6P6C PC Link Cable for Sky-Watcher AZ-GTi Mount

Connect your Sky-Watcher AZ-GTi mount to a computer with this USB-to-RJ12 PC link communication cable. It features a Prolific USB-to-Serial UART TTL interface and a 6P6C RJ12 connector, allowing communication between a compatible computer and telescope mount.

Key Features

• Wide Compatibility: Designed for PC communication with the Sky-Watcher AZ-GTi mount.

• USB Interface: Connects directly to a computer's USB port.

• Prolific USB UART Chip: Uses a Prolific USB-to-Serial interface for serial communication.

• RJ12 6P6C Connector: 6-position, 6-contact modular connector for the mount connection.

• PC Control: Suitable for compatible telescope control software and computer-based mount communication.

• Easy Connection: No separate USB-to-serial adapter is required.

Specifications

• Product Type: USB PC Link Communication Cable

• Compatible Mount: Sky-Watcher AZ-GTi

• USB Chip: Prolific USB-to-Serial

• Signal Type: UART TTL

• Mount Connector: RJ12 6P6C

• Connection: USB to RJ12

• Application: Telescope Mount PC Control

Package Includes

• 1 × USB to RJ12 6P6C PC Link Cable

Note: Please verify the connector pinout and electrical signal requirements of your mount before purchasing. UART TTL is different from standard RS232 voltage levels. Compatibility with EQMOD or other telescope software depends on the mount firmware, connection method, and software configuration.

User Guide – USB to RJ12 Cable for Sky-Watcher AZ-GTi

1. Required Equipment

Before installation, prepare:

• Sky-Watcher AZ-GTi mount

• USB to RJ12 6P6C PL2303 communication cable

• Windows computer or laptop

• Compatible telescope control software

• PL2303 USB-to-Serial driver

2. Install the PL2303 USB Driver

1. Visit the official Prolific website:
   https://www.prolific.com.tw/en/products/smart-i-o-solution-en/usb-1-1-to-uart-serial-printer/

2. Download the appropriate PL2303 driver for your Windows version and chip model.

3. Run the driver installation program.

4. Follow the on-screen instructions to complete installation.

5. Restart your computer if required.

3. Connect the Cable to Your Computer and Mount

1. Turn off the AZ-GTi mount.

2. Locate the compatible RJ12 communication port on the mount.

3. Connect the RJ12 6P6C plug to the communication port.

4. Connect the USB plug to your computer.

5. Turn on the AZ-GTi mount.

Important: Do not connect the cable to the ST-4 autoguider port. Make sure the RJ12 connector and pinout are compatible with the mount before connecting.

4. Check the COM Port in Windows

1. Right-click the Windows Start button.

2. Select Device Manager.

3. Expand Ports (COM & LPT).

4. Look for Prolific USB-to-Serial Comm Port.

5. Check the COM port number displayed, such as COM3, COM4 or COM5.

For example, if Windows displays Prolific USB-to-Serial Comm Port (COM4), select COM4 in your telescope control software.

If the device does not appear, check the USB connection and driver installation.

5. Configure Telescope Control Software

1. Install software compatible with the AZ-GTi mount and your selected connection method.

2. Open the telescope control software.

3. Select the appropriate mount driver or connection interface.

4. Select the COM port identified in Device Manager.

5. Configure the communication settings according to the software and mount requirements.

6. Click Connect to establish communication.

7. Test the mount connection using the software's available control functions.

6. EQ Mode and EQMOD Configuration

For users intending to operate the AZ-GTi in equatorial mode:

1. Make sure the mount has compatible EQ-mode firmware installed.

2. Configure the mount according to the firmware instructions.

3. Install the required ASCOM platform and compatible mount driver, if needed.

4. Select the correct COM port in the telescope control software.

5. Establish the connection and test mount movement.

Note: EQMOD compatibility is dependent on the firmware, driver and connection configuration. This cable alone does not enable EQ mode or guarantee compatibility with every version of EQMOD.

7. Troubleshooting

Problem 1: The cable is not detected by Windows.

• Check whether the PL2303 driver is installed.

• Try another USB port.

• Check Device Manager for an unknown USB device.

Problem 2: No COM port appears.

• Reinstall the correct PL2303 driver.

• Disconnect and reconnect the USB cable.

• Check Device Manager under Ports (COM & LPT).

Problem 3: The software cannot connect to the mount.

• Verify that the correct COM port is selected.

• Check the RJ12 connector and pinout.

• Make sure the mount is powered on.

• Confirm that the software supports the selected mount connection method.

Problem 4: The mount does not respond to control commands.

• Check the firmware and software configuration.

• Verify the cable's TX, RX and GND wiring.

• Confirm that the TTL signal voltage matches the mount requirements.

8. Technical Safety Notes

• This cable uses UART TTL serial communication.

• The intended signal level is 3.3V TTL, subject to hardware verification.

• It is not a standard RS232 cable.

• Do not connect it to a standard RS232 voltage interface.

• Verify the RJ12 pinout before use.

• For further assistance, please contact us with your mount model, firmware version and Windows COM port information.