**NOTE:** The **T3H-G004** adapter routes the RS232 Tx and Rx connection to the **COMMAND** ECU and they are NOT replicated on the port replicator connector. All other pins are replicated for connection of other devices.
#### For FMX/FM1000 Connect the **T3H-G004** adapter to Port C or Port D on the FMX display depending on whether antenna port 1 or 2 is to be used. Port C will provide the NMEA output for antenna port 1 while Port D will provide NMEA output for antenna port 2. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/gv3g0LjujVC6TfsI-image.png) #### For GFX/TMX with TM-200 and EXP-100 Connect the T3H-G004 adapter to the EXP-100 port expander module. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/1femlJZ3ZAH8QE9L-image.png) A port replicator is supplied in case the port was already in use for something else, if so disconnect the device, connect **T3H-G004** and then reconnect the device using the port replicator on **T3H-G004.** [](https://docs.t3rra.com/uploads/images/gallery/2025-07/xxawJnUqq8xMDqhC-image.png) Connect the other end of **T3H-G004** to the **T3H-C002** ECU breakout harness. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/csTqSFz0mjgZA4Hw-image.png) Next, follow the setup process below for activating the NMEA output port on the FMX/TMX system. ## Activating the NMEA Output - FMX/FM1000 Make sure that if present, Autopilot is configured for use on Port A - this leaves Port C and Port D free for NMEA output of either implement receiver. 1\. Select the GPS Receiver listed below Autopilot \[Vehicle\] and press "Setup". 2\. Press the "GPS Output" button. 3\. Configure the NMEA GPS Output port as below: - Select Output Port A (ext. GPS) - Select a message rate of 5 Hz - Select a Baud Rate of 38400 - Set Maximum GGA Quality to 0 - Set Lat/Lon Precision to 8 - Press the "NMEA Messages" Tab. 4\. Configure the NMEA Messages as below: - Set GGA, to "On". - Set GSA, to "On". - Set VTG, to "On". - Leave all other messages set to "Off". [](https://docs.t3rra.com/uploads/images/gallery/2025-07/1eCDkWpS6dI6xoug-image.png) [](https://docs.t3rra.com/uploads/images/gallery/2025-07/Di4SgRz29gVvrUIJ-image.png) [](https://docs.t3rra.com/uploads/images/gallery/2025-07/IG2n3zXiNXJzWaCS-image.png) [](https://docs.t3rra.com/uploads/images/gallery/2025-07/puLZoHxvb9qXPnNH-image.png) # 8.3 | Modern Case IH / New Holland / Trimble This section covers connection of Novatel-based GNSS receivers using a 12-pin Deutsch interface. **Applicable to receivers including:** Case IH - Vector Pro New Holland - PLM Cygnus Trimble - AG-372, AG-392, NAV-900 Steyr - S-Guide [](https://docs.t3rra.com/uploads/images/gallery/2026-07/NYR6G2QZm2Kn3gr7-image.png) ## Parts Required - **BPF11284 - **Front Extension Harness (10m) - **PF81137 - **Implement Pigtail Terminator Wiring Harness - **T3H-G002** - COMMAND Impl Adapter - NAV-900 - **T3H-S001** - COMMAND Impl Adapter – Stub Junction - **Optional - T3H-G001 / T3H-G007** - COMMAND NMEA Extension Harness - Only required if using NMEA 0183 Serial for GNSS data. ## Connection Process 1\. Connect the John Deere Front Extension Harness to the ISOBUS breakaway connection. 2\. Route along the implement, allowing slack at pivot points and avoiding snag hazards. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/AsF8TBsTh5FtRUiE-image.png) 3\. Connect the **T3H-S001** adapter to the Front Extension Harness. [****](https://docs.t3rra.com/uploads/images/gallery/2025-07/SuU4oxt2DKiArihK-image.png) 4\. Connect the Implement Pigtail Terminator to the **T3H-S001** adapter and secure the terminator to the implement receiver wiring harness. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/xGDljli6p8S80NtF-image.png) 5\. Connect the **T3H-G002** adapter to the **T3H-S001** adapter. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/JKqGyH4UW8wofgXl-image.png) 6\. Connect the **T3H-G002** adapter to the appropriate GNSS receiver port. 7\. If using NMEA 0183 Serial, also connect the NMEA extension harness to the **T3H-G002**, then connect the other end to the **T3H-C002** ECU breakout harness. **Verify:** \- Receiver powers on # 8.5 | NMEA 0183 NMEA 0183 Serial (RS232) capable receivers can be connected to the **COMMAND** system.**IMPORTANT:** If the GNSS receiver does not provide terrain compensation, an IMU must be installed to maintain accuracy.
## Parts Required - **BPF11284 - **Front Extension Harness (10m) - **PF81137 - **Implement Pigtail Terminator Wiring Harness - **T3H-S001** - COMMAND Impl Adapter – Stub Junction - **T3H-G001 / T3H-G007** - COMMAND NMEA Extension Harness (8m or 12m) - **Custom GNSS Adapter** - Custom adapter for connection of the NMEA 0183 Serial compatible receiver to the **T3H-S001** and **T3H-G001/G007** adapters. ## Connection Process 1\. Connect the John Deere Front Extension Harness to the ISOBUS breakway connector. 2\. Route along the implement, allowing slack at pivot points and avoiding snag hazards. ****3. Connect the **T3H-S001** adapter to the Front Extension Harness. **[](https://docs.t3rra.com/uploads/images/gallery/2025-07/szCk65qzjfDIekAM-image.png)** 3\. Connect the **PF81137** Implement Pigtail Terminator to the Implement Receiver Wiring Harness and secure the terminator to the implement receiver wiring harness. [](https://docs.t3rra.com/uploads/images/gallery/2025-07/xGDljli6p8S80NtF-image.png) 4\. Connect the **CUSTOM** adapter to the **T3H-S001** adapter. 5\. Connect the **CUSTOM** adapter to the receiver's port ensuring connector keys are lined up. 6\. Connect the NMEA extension harness **T3H-G001** or **T3H-G007** to the **CUSTOM adapter, then connect the other end to the **T3H-C005** external breakout harness. ## Receiver Configuration Perform necessary setup of the GNSS receiver using provided manufacturer tools or programs: - - Talker ID should be set to GP or GN - Messages enabled - GGA, GSA, VTG - Output Update rate - 10Hz recommended - Baud Rate - 38400 **Verify:** \- Receiver powers on