Garmin Apollo MS-ERX400 Marine Wired Remote Control

Product Overview

The Garmin Apollo MS-ERX400 is an optional wired remote control accessory compatible with Fusion® marine stereo systems. It allows for control of various audio functions, network configuration, and system settings.

Diagram Description: The product is a rectangular marine stereo remote control with a rotary dial on the left side and a display area with several vertical indicator lights below it.

Note: Please refer to the product packaging for important safety and product information.

Getting Started

The ERX400 wired remote control is a compatible accessory for Fusion® marine stereo systems. For a list of compatible stereo systems, visit garmin.com/account/register/ or consult your Fusion dealer.

This manual provides general operating instructions and setup information for the remote. Specific features and functions may vary depending on the stereo system being controlled and the type of source connected.

Note: This remote must be connected to a Fusion PartyBus™ network or directly to a compatible Fusion stereo system that is correctly configured. Refer to the installation instructions provided with the remote and other stereo systems for network installation and configuration details.

Controls

The remote features a rotary dial and several buttons for operation.

Rotary Dial

• Turn to adjust volume.
• Press while adjusting volume to switch between zones.
• Turn to browse menus or adjust settings.
• Press to select a highlighted option in menus.
• Press and hold to activate certain functions, such as recalling a radio preset or muting all connected stereos (see Muting All Connected Stereos, page 9).

Power Button

• Press to turn on the remote.
• Press to mute and unmute audio.
• Press and hold to turn off the stereo system or all stereos on the network.
• Press and hold for more than 10 seconds to reset the remote.

Note: When you turn the connected stereo system on or off, the stereo system turns on or off as well.

Menu Button

• Press to open the menu.
• Press to return to the previous screen in the menu.
• Press and hold to exit the menu.

Back Button

• Press to select a source.
• Tip: You can browse sources by rotating the dial and pressing the dial to select a source.
• When connected to a Fusion PartyBus network, press and hold to open the Groups menu (Fusion PartyBus Network, page 6).

Play and Pause Button (Source Specific)

• For applicable sources: Press to skip to the previous track.
• For applicable sources: Press and hold to fast-rewind the track.
• AM/FM: Press to tune to the previous station or preset. Press and hold to quick-tune (manual mode only).
• AUX: Press to decrease gain.
• SIRIUSXM Source: In Live mode, press to tune to the previous station or preset. Press and hold to quick-tune (manual mode only). In Replay mode, press to skip to the previous track. Press and hold to rewind the current track.
• DAB Source: Press to go back to the previous DAB station in the current group. If you reach the beginning of the current group, the stereo will automatically play the last available station in the previous group. Press and hold to go back to the previous DAB group.
• BLUETOOTH or USB: Press to pause or resume the current track.
• AM/FM: Press to cycle through tuning modes (Auto, Manual, and Presets). Press and hold to save the current station as a preset.
• SIRIUSXM Source: Press and hold to toggle between Replay and Live modes. In Live mode, press to cycle through tuning modes (Manual, Category, and Presets). In Replay mode, press to pause and play.
• DAB: Press to toggle between Manual tune mode and presets. Press and hold to scan for DAB stations.
• For applicable sources: Press to skip to the next track.
• For applicable sources: Press and hold to fast-forward the track.
• AM/FM: Press to tune to the next station or preset. Press and hold to quick-tune (manual mode only).
• AUX: Press to increase gain.
• SIRIUSXM Source: In Live mode, press to tune to the next station or preset. Press and hold to quick-tune (manual mode only). In Replay mode, press to skip to the next track (if applicable). Press and hold to fast-forward the current track (if applicable).
• DAB Source: Press to advance to the next DAB station in the current group. If you reach the end of the current group, the stereo will automatically play the first available station in the next group. Press and hold to advance to the next DAB group.

Trash Can Symbol

• For applicable sources: Press to skip to the next track.
• For applicable sources: Press and hold to fast-forward the track.
• AM/FM: Press to tune to the next station or preset. Press and hold to quick-tune (manual mode only).

Using the Rotary Dial to Select Items

You can use the rotary dial to highlight and select items on the screen.

• Turn the dial to highlight an item on the screen.
• Press the dial to select the highlighted option.

Entering Text

1. In a field where you can enter text, select Delete [?️] to erase existing characters.
2. If necessary, select the Left arrow [⬅️] or Right arrow [➡️] to use numbers, symbols, or lowercase letters.
3. Turn the dial to select a letter, then press the dial to accept it.
4. Select the Checkmark symbol [✔️] to save the new text.

Remote Screen

The information displayed on the screen varies depending on the selected source. This example shows a track playing from a connected device via Bluetooth® wireless technology.

Diagram Description: The remote screen displays the source name (e.g., BLUETOOTH), track information (artist, title), playback progress (time elapsed/total, track number), and album art. Numbered callouts point to:

1. Source Name
2. Activity and Status Icons (Network Status Icon, see page 11)
3. Track Information (if available)
4. Album Art (if available from a compatible source)
5. Playback Time, Track Duration, and Current Track Number/Total Tracks in Playlist (if available)

Naming Devices

You should give each device a unique name to easily identify it when viewing devices on the Fusion PartyBus network.

Note: For further customization, you can give each stereo zone a unique name and disable unused sources. For more information, refer to the stereo system's user manual.

1. Select Menu button [☰] > Settings.
2. Select the device to rename.
3. Select the device name, then select an option:
   • Select a predefined name from the list.
   • Select Custom Name, then enter a unique name for the device.

Setting Primary Zone

The primary zone is the speaker zone that the remote's rotary dial adjusts by default when you rotate it. The primary zone can be assigned to any speaker zone on a compatible stereo system on the Fusion PartyBus network. When you set the primary zone on the remote, the remote is associated with that stereo system for default playback control.

1. Select Menu button [☰] > Settings.
2. Select the name of this remote.
3. Select Assign Primary Zone.
4. Select the zone.

Selecting Source

1. Select Back button [⬅️].
2. Turn the dial to highlight a source.

Note: If the device is part of a group, continue turning the dial to access sources from other devices in the group (Fusion PartyBus Network, page 6). If a source cannot be shared with the group, it will appear grayed out, and you will not be able to select it.

3. Press the dial to select the source.

Adjusting Backlight Brightness

1. Select Menu button [☰] > Brightness.
2. Adjust the brightness level.

Note: You can only adjust the backlight brightness of this remote. To adjust the brightness of other remotes or stereo systems on the network, you must adjust the settings directly from each remote or stereo system.

Adjusting Volume

With this remote, you can control the volume of any zone on any stereo system connected to the Fusion PartyBus network.

1. Turn the dial to adjust the volume of the primary zone on the stereo system.
2. If necessary, press the dial to switch between zones.

Note: If a stereo system is part of a group, you can adjust the volume for all stereo systems in the group, or for individual zones on each stereo system (Fusion PartyBus Network, page 6).

Muting All Connected Stereos

You can quickly mute the audio from this stereo system, or from all stereo systems connected to the Fusion PartyBus network (Fusion PartyBus Network, page 6).

1. From any source, press the Power button [].

A mute symbol [?] will appear, and the audio from this stereo system will be muted. Note: If this stereo system is part of a group, the audio from all stereo systems in the group will be muted.

2. Press and hold the dial to select Mute System. All connected stereos will be muted.
3. Press and hold the dial to select Unmute System. All connected stereos will resume playback.

Adjusting Subwoofer Volume

You can adjust the subwoofer volume for each zone.

1. Press the dial button, then select a zone connected to a subwoofer.
2. Press and hold the dial. The Subwoofer Level adjustment dial will appear for that zone.
3. Adjust the subwoofer and press the dial to set.

Maintaining Individual Zone Volume Levels

If you adjust individual zone volume levels so that some zones have higher volumes than others, the volume settings for the individual zones will be affected when you adjust the volume for the All Zones. By default, if you set the All Zones volume to 00, this will set all zone volumes to 00 and reset all individual zone volume settings. You can enable the Maintain Volume Ratio option so that individual zone volumes are retained when All Zones volume is set to 00.

Note: This setting only applies to volume adjustments made on the stereo system or the ERX400 remote. If you adjust the stereo system volume using a connected chartplotter or NRX remote, the volume levels will still be reset.

Tip: For best results when this option is enabled, set the power-on volume limit for the primary zone stereo system to 24. For more information, refer to the stereo system's user manual.

1. Select Menu button [☰] > Settings.
2. Select the name of the remote.
3. Select Maintain Volume Ratio.

Turning Off Network Devices

You can turn off this remote and the primary zone stereo system, or turn off all devices connected to the network.

1. Press and hold the Power button [].
2. Select an option:
   • Select Turn Off: %1 to turn off this remote and its assigned primary zone stereo system.
   • Select Turn Off All to turn off all devices connected to the network.

Fusion PartyBus Network

The Fusion PartyBus network feature allows you to connect multiple compatible stereo systems using a combination of wired and wireless connections. Note: When connecting Fusion stereo systems to a Garmin BlueNet™ network or Garmin® Marine Network, only Garmin and Fusion devices can be used. You may not be able to use third-party routers, storage devices, or other network products directly with these stereo systems.

Tip: After connecting stereo systems to a Garmin BlueNet network or Garmin Marine Network, you can connect a mobile device to the wireless access point on the connected Garmin chartplotter and use the Fusion Audio app to control the stereo systems.

You can group one compatible stereo system (e.g., Apollo RA670 stereo system) with other compatible stereo systems connected to the Fusion PartyBus network. Grouped stereo systems can share available audio sources and control media playback on all stereo systems within the group, creating a synchronized audio experience across the vessel. You can quickly create, edit, and split groups using any compatible stereo system or remote on the network as needed.

You can use compatible stereo systems and remotes (whether grouped or not) to adjust the volume of available speaker zones on any stereo system on the network.

When building a Fusion PartyBus network, refer to the installation instructions provided with the remote.

Creating a Group

Before creating a group, you must connect multiple compatible stereo systems to the Fusion PartyBus network. For information on installing and configuring the network, refer to the installation instructions provided with the stereo systems.

Note: There are some limitations and considerations when using stereo systems within a group. For more information, see Grouped Stereo Source Considerations, page 7.

1. Select Menu button [☰] > Groups.
2. Tip: You can press and hold the Back button [⬅️] from any screen to open the Groups menu.
3. Select the name of the stereo system you want to be the primary stereo system in the group.
4. Select the stereo systems you want to add to the group.
5. Select Done.

From the source screen, you can select sources from any stereo system in the group (other than a stereo system zone), such as the Apollo SRX400 stereo system, or on the Fusion PartyBus network.

Editing a Group

1. Select Menu button [☰] > Groups.
2. Select the group.
3. Select the stereo systems you want to add or remove from the group.
4. Select Done.

Leaving a Group

You can leave a Fusion PartyBus group to play local sources on the stereo system.

1. Select Menu button [☰] > Groups.
2. Select the group you want to leave.
3. Select the stereo systems you want to remove from the group.
4. Select Done.

Grouped Stereo Functionality

Once a group of stereo systems is created, other features and options are available for all stereo systems in the group.

• After you create a group, all stereo systems in the group can share a synchronized display.
• You can select a source from any stereo system in the group, with some limitations (Grouped Stereo Source Considerations, page 7). The source will play simultaneously on all stereo systems in the group (Selecting Source, page 4).
• You can control playback (e.g., pause and skip tracks) from any stereo system in the group, which will affect all stereo systems in the group.
• You can adjust the volume of any zone on any stereo system in the group. Tip: When you adjust the volume, you can choose to adjust the volume for all stereo systems in the group simultaneously.

Grouped Stereo Source Considerations

You should follow these considerations when selecting sources to play on the network.

• You cannot share AirPlay® sources with grouped stereo systems. Using AirPlay 2 software allows you to play content on multiple stereo systems on the network, but you cannot group these stereo systems.
• When a source is streamed over the data network, there may be a slight delay in synchronized audio. You may notice this if you are also using an external audio source.
  • If your TV is connected to the stereo system via "Optical Out" and you continue to use the TV speakers, there will be a delay between the audio from the TV speakers and the audio streamed from the grouped stereo systems.
  • If you synchronize a radio station and tune to the same radio station on an ungrouped stereo system, there will be a delay between the audio from the ungrouped stereo system and the audio streamed from the grouped stereo systems.
• If you change the enabled group setting for a source, you can eliminate this delay, but you cannot share this source with grouped stereo systems.

Note: If a stereo system is part of a group, you cannot change its settings. You must remove the stereo system from the group to change any settings.

Group Sync

By default, when you turn off stereo systems in a group, the groups you created are not retained. If you turn off individual stereo systems that were added to a group, those stereo systems will leave the group. If you turn off the primary stereo system in a group, the group will be disbanded. You can enable the Group Sync feature to retain the group membership of stereo systems after they are turned off. The behavior of Group Sync differs depending on how you turn stereo systems on and off.

• If you turn a synchronized stereo system on or off using the power button on the stereo system or the ignition wire (red wire), all synchronized stereo systems in the group will turn on or off together. This applies to all synchronized stereo systems in the group, regardless of whether one stereo system is the primary stereo system in the group. Note: Selecting Turn Off All from the stereo system's power menu will turn off all stereo systems on the network, even if they are not in a group or do not have Group Sync enabled.
• If you turn a synchronized stereo system on or off using the physical switch on the power wire (yellow wire), the behavior of other synchronized stereo systems in the group may differ.
  • If the synchronized stereo system is the primary stereo system in the group, and you turn it off using the physical switch on the power wire, all other synchronized stereo systems in the group will remain on but will leave the group. When you turn the primary stereo system back on, the other synchronized stereo systems will rejoin the group.
  • If the synchronized stereo system is not the primary stereo system in the group, and you turn it off and on using the physical switch on the power wire, all other synchronized stereo systems in the group will remain on and grouped. When you turn the stereo system back on, it will rejoin the group.

Enabling Group Sync

Before enabling Group Sync, you must remove stereo systems from any existing groups. If a stereo system is part of a group, you cannot update the settings.

You must enable this setting for each stereo system for which you want to retain group settings after a power cycle.

1. Select Menu button [☰] > Settings.
2. Select the name of the stereo system.
3. Select Power Options > Group Sync.

The stereo system will retain its group settings after a power cycle.

4. Repeat as needed for additional stereo systems. Note: You must enable Group Sync on all stereo systems connected to the network for the sync feature to work correctly.

General Settings

Select Menu button [☰], select the remote's name, then select Settings.

Note: If you select the name of the stereo system you are currently controlling before selecting Settings, you can adjust the stereo system's settings instead of the remote's settings.

If the stereo system is part of a group, you cannot change the stereo system's settings.

The following settings apply only to the remote. For information on specific stereo system settings, refer to the stereo system's user manual.

• Device Name: Assign a name to the remote for better identification on the network.
• Language: Set the language used on the remote.
• Power Options > Economy Mode: Disables the LCD backlight after one minute of inactivity to save battery power.
• Assign Primary Zone: Assigns the default zone for the remote on a connected stereo system.

Update Options

Select Menu button [☰], then select Device Name, Settings > Update.

• ERX Remote: Update the remote software using a USB flash drive connected to the stereo system from a stereo system connected to the ETHERNET port or Fusion PartyBus network (Software Updates, page 9).
• Restore Factory Defaults: Resets all settings to their factory default values.

Network Settings

Note: If a Garmin chartplotter is detected on the network, the stereo system will automatically switch to Garmin Marine Network mode, and all other network settings will be disabled.

Select Source button [▶️] > Settings, then select the remote's name, then select Network.

• DHCP Client: Sets the device as a DHCP client. This is the default setting for all devices not configured as DHCP servers.
• Static IP: Allows you to set a static IP address for the device (Setting a Static IP Address, page 9).
• Reset: Resets the network configuration on the remote to factory default settings.
• Details: Displays information about the network configuration.
• Save: Allows you to save any changes made to the network settings.

Setting Device as DHCP Client

By default, this device is set as a DHCP client. When set as a DHCP client, the device is configured to operate on a network with a DHCP server. If there is no DHCP server on the network, the device assigns itself a local IP address after a short delay.

Note: Although Fusion PartyBus devices can communicate with each other without a DHCP server on the network, it is highly recommended to have a properly configured DHCP server on the network for optimal performance, especially when first powering on the devices.

1. Select Menu button [☰] > Settings.
2. Select the name of this device.
3. Select Network > DHCP Client > Save.

Setting Static IP Address

If the stereo system is configured as a static IP, it is automatically assigned the IP address 192.168.0.1. You can change this IP address.

If the stereo system is a DHCP client on the network, and you do not want the DHCP server to automatically assign an IP address to the stereo system, you can set a static IP address.

Note: Every device on the network must have a unique IP address. If you select a static IP address that is the same as another IP address on the network, the device will not function correctly.

1. Select Menu button [☰] > Settings.
2. Select the name of the remote.
3. Select Network > Static IP.
4. Select an option:
   • To set the IP address, select IP, then enter the IP address.
   • To set the subnet mask, select Mask [%1], then enter the subnet mask. Note: The subnet mask must match all other devices on the network for it to function correctly. A typical subnet mask is 255.255.255.0.
   • To set the default gateway IP address, select Gateway, then enter the gateway IP address. Note: The default gateway is typically set to the IP address of the DHCP server on the network.
5. Select Save.

More Information

Registering Your Fusion Device

Complete our online registration to help us provide you with better support.

• Visit garmin.com/account/register/.
• Keep your original sales receipt or a copy of it in a safe place.

Cleaning the Device

1. Dampen a soft, lint-free cloth with fresh water.
2. Gently wipe the device.

Software Updates

You must update the software for this device using a connected compatible stereo system or the Fusion Audio app. For best results, you should regularly update the software on all Fusion devices.

Updating Remote Software via USB Flash Drive

You can update the remote software using a USB flash drive through a compatible stereo system on the network.

Warning: Do not turn off the device or disconnect the power during software updates. Disconnecting power during a software update may cause the device to become unresponsive.

Note:

• You cannot use a USB flash drive formatted with the NTFS file system to update software. If you encounter issues updating the device, format the USB flash drive with the FAT32 file system and try the update process again.
• The device may restart several times during an update. This is normal.
• You can only program newer versions of software onto the device.

1. Go to the device software page on support.garmin.com and download the update file.
2. Extract the contents of the .zip file to the root directory of the USB storage device. The software update contents are in a folder named Garmin.
3. Insert the USB storage device into a USB port on a compatible Fusion PartyBus stereo system on the network.
4. On the ERX400, select Menu button [☰] > Settings.
5. Select the name of the remote.
6. Select Update > Accessories > ERX Remote.

Tip: If the stereo system with the USB storage device has a screen, you can also initiate the remote update process from the stereo system's Update settings menu.

The stereo system transfers the update file to the remote, updates the remote software, and then restarts.

Updating Remote Software via Fusion Audio App

You must connect the Fusion Audio app to the network using a wireless router or access point to update the software. You cannot use a Bluetooth connection to update the software.

If the Fusion PartyBus network has a wireless router or access point, you can use the Fusion Audio app (available for Apple® or Android™ from the Apple App Store™ or Google Play store) to update the remote software.

Warning: Do not turn off the device or disconnect the power during software updates. Disconnecting power during a software update may cause the device to become unresponsive.

Note:

• The device may restart several times during an update. This is normal.
• You can only program newer versions of software onto the device.

1. Connect your mobile device to a wireless router or access point on the Fusion PartyBus network.
2. Open the Fusion Audio app and confirm that you can see the remote in the app.
3. If the Fusion PartyBus is not yet connected to the internet, disconnect your mobile device from the wireless router or access point.
4. In the Fusion Audio app, select Settings symbol [⚙️] > Check for Updates > MS-ERX400 > Download. The app downloads the software update file.
5. If the Fusion PartyBus is not yet connected to the internet, reconnect your mobile device to the wireless router or access point after the app has finished downloading the update file.
6. In the Fusion Audio app, select the name of the remote.
7. Select Settings symbol [⚙️] > General > Software Update > Update Software Online. The app transfers the software update to the remote over the Wi-Fi® network, updates the remote software, and then restarts.

Frequently Asked Questions (FAQ)

Stereo Does Not Respond to Button Presses

• Press and hold the Power button [] until the stereo system turns off, then turn it back on to reset the stereo system.
• Disconnect the stereo system's power for two minutes to reset it.

Network Troubleshooting

If you cannot see or connect to Fusion PartyBus devices on the network, follow these steps.

• Check that all Fusion PartyBus devices, network switches, routers, and access points are connected to the network and powered on.
• Check that wireless Fusion PartyBus devices are connected to a wireless router or access point on the network. Note: Wired connections are more reliable than wireless connections. If possible, connect devices to the network using an Ethernet cable.
• Check that only one device, either the stereo system or the router, is configured as a DHCP server.
• At this point, change the channel of the router or access point to test and correct interference. If there are many wireless access points nearby, you may experience wireless interference.
• At this point, disconnect Bluetooth devices to test and correct interference. Connecting Bluetooth devices to a stereo system configured as an access point or client may reduce wireless performance.
• If you are having difficulty establishing a connection, ensure that your router supports 2.4 GHz band connectivity. This device is only compatible with 2.4 GHz band connectivity when connecting to a wireless router and cannot connect to the 5 GHz band.
• If you have configured static IP addresses, check that each device has a unique IP address, and that the first three sets of numbers in the IP address match, and that the subnet mask is the same for each device.
• If configuration changes you have made may be causing network issues, reset all network settings to factory default values.

Network Status Icons

Network status icons are displayed on certain screens of the device. You can refer to this table to understand the appearance of the icons and help diagnose Fusion PartyBus network issues.

• [Connected Icon] Device is connected to the network correctly.
• [Disconnected Icon] Device cannot detect the network. The Ethernet cable may not be connected, or there may be other network issues.

Specifications

¹ The device can be submerged in water up to 1 meter for up to 30 minutes and can withstand high-pressure water jets. For more information, visit www.garmin.com/waterrating.

Dimensions

Diagram Description: A side profile and front view of the marine stereo remote control showing various measurements labeled with numbers 1 through 6. A table provides the specific measurements for each numbered item.