RS232 Harness kit

The RS232 Harness kit (PF90363) can be utilized to aid installation when connecting third party controllers or a GPS receiver to the GS3 display. This kit comes with Instructions, Null Modem, Gender Changer and Harness. The harness is approximately 1829 mm (6 ft) long and consists of a DB9 connector at one end and 5 wires with female AMP pins attached at the other. These AMP pins will be inserted into the square 26 pin connector that attaches to the back of GS3 displays from harnesses PF80687 and PF80688.

If both a 3rd party controller and receiver will be connected to the GS3 simultaneously, two PF90363 kits may be required. The Original GreenStar Field Doc Connect harness is only compatible with GS3 through the harness. When using the original FDConnect harness, you must choose Com port 1 in documentation setup.

Documentation with third party controllers

The list of GS3 supported controllers are the same as with Original GreenStar Display and is available at your local John Deere dealer.

Two serial ports are available in the GS3 display: Port 1 and Port 2.

Connect DB9 connector to controller. Gender Changer and Null Modem are required when connecting to Rawson and New Leader controllers. Properly configure the controller to talk to GS3:

Raven Controller: under the data menu key verify that bAUD = 9600, triG = 1, Unit = sec, dLOG = ON.

Rawson or New Leader Controller: verify that the settings under the “Controller” button of the GS3 display match the information on the controller (i.e. Mid Point on the GS3 Display should be the same value as on the Rawson or New Leader controller). GS3 will control only one channel of Rawson controller for use with prescriptions.

NOTE: Set Rawson or New Leader controller to GPS Mode (under Mode Key) to enable serial port communication with controller.

Connecting a third party receiver

AutoTrac requires CAN GPS messages from an original StarFire receiver or StarFire iTC receiver. Non-John Deere GPS receivers that output correct NMEA 0183 standard messages can be used for documentation and manual guidance with a GreenStar application. It is critical that receiver is setup to output the following messages:

• GGA
• GSA
• RMC setup at 19200 baud (This is fixed and Non-adjustable)
• Data bits 8
• Parity none
• Stop bits 1
• Flow Control none
• 1 or 5 Hz output rate (Recommend operation at 5 Hz. Guidance requires 5 Hz.)

Without these messages, receiver will not function with GreenStar application. From the receiver manufacturer's wiring diagram, determine which wires from the receiver are the signal transmit and signal ground. Verify that Receiver Transmit connects to Pin 3 of the DB9 connector and receiver ground connects to pin 5 of the DB9. Look at the front face of the connector to see the pinout number designation.

Pinout number are located on the back side of the connector (where the wires are inserted).

To Setup RS232 Serial Port 1 on a GS3 Display
RS232 Wire	Display Connector Pin #
Blue	Pin 23 = Rx
Green	Pin 22 = Tx
White	Pin 25 = CTS
Red	Pin 24 = RTS
Black	Pin 2 = Ground

To Setup RS232 Serial Port 2 on a GS3 Display
RS232 Wire	Display Connector Pin #
Blue	Pin 15 = Rx
Green	Pin 26 = Tx
White	Pin 17= CTS
Red	Pin 16 = RTS
Black	Pin 4 = Ground

1. Remove the square connector from the back of the GS3 display and from all power sources on the vehicle.

2. The square AMP 26-pin display connector has a built in pin locking mechanism.

   1. Locate the large single white locking tab.

   2. Using a flat screwdriver, depress this tab. It will depress approximately 3 mm (1/8 in.).

   3. Two tabs on the opposing side will become exposed once the single large tab is depressed.

   4. Once these two white tabs are exposed, the connector pins are unlocked.

3. Use the chart at the beginning of this instruction to determine the pin locations for the desired Serial Port you will utilize (for example: Serial Port 1 uses pin locations 2, 22, 23, 24, & 25). Pin location numbers are stamped into the black housing on the back of the connector.

4. Remove the white plugs for the correct pins you will add the RS232 wires to. The white plugs will pull out easily with small needle-nosed pliers.

5. Insert harness wires into correct pin locations. You may need to utilize a needle-nosed pliers to push the connections forward through the orange seal in the connector.

6. Once you have all 5 wires pushed up flush to the front of the connector face, you need to lock the pins back in place by pushing down on the 2 white locking tabs until they are flush.

Configure GS3: needs to be configured to recognize the device connected to the Serial Port. Assigned the Serial Port

1. Go to Menu | GS3 Pro | Letter F (GS3 Pro—Main) and select the Memory tab. Select Assign Serial Port.

2. Select the Serial Port(s).

3. Select the option based on the device connected to the Serial Port(s).

4. Arrow forward to complete.

For additional information see the installation instruction that came with the RS232 adapter.