Installation Instructions

Optional switch. Must be turned on for remote operation
Auxiliary relay (one 12 V relay included)
Power source
Garmin Marine Network cable
GMS 10 network port expander (requires a power connection)
Network device (for future use)
Negative control wire, white
Positive control wire, black
Negative load wire, blue
Positive load wire, yellow
NMEA 2000 Considerations
NOTICE
If you are connecting to an existing NMEA 2000 network, identify the NMEA
2000 power cable. Only one NMEA 2000 power cable is required for the
NMEA 2000 network to operate properly.
A NMEA 2000 Power Isolator (010-11580-00) should be used in installations
where the existing NMEA 2000 network manufacturer is unknown.
NOTE: If you are installing a NMEA 2000 power cable, you must connect it to
a relay, the boat ignition switch, or through another in-line switch. NMEA 2000
devices will drain your battery if the NMEA 2000 power cable is connected to
the battery directly.
This device can connect to a NMEA 2000 network on your boat to monitor and
control compatible NMEA 2000 devices. The included NMEA 2000 cable and
connector allow you to connect the device to your existing NMEA 2000
network. If you do not have an existing NMEA 2000 network you can create a
basic one using cables from Garmin.
If you are unfamiliar with NMEA 2000, you should read the “NMEA 2000
Network Fundamentals” chapter of the Technical Reference for NMEA 2000
Products at garmin.com/manuals/nmea_2000.
The port labeled NMEA 2000 is used to connect the device to a standard
NMEA 2000 network.
If you will only be monitoring part of your OnDeck network, you must connect a
power isolator to separate the part of the network you will monitor.
GTB 10 black box device
NMEA 2000 compatible Garmin device
Ignition or in-line switch
NMEA 2000 power cable
NMEA 2000 drop cable
Power source
NMEA 2000 terminator or backbone cable
NMEA 2000 T-connector
NMEA 2000 terminator or backbone cable
NMEA 2000 Connection Diagram with Relay
NOTICE
To avoid potential damage to the relay switch, GTB 10 black box device, and
device being switched, you must install this relay switch in a dry location.
This relay is automatically controlled by the GTB 10 black box device to switch
power to NMEA 2000 devices.
GTB 10 black box device
GTB 10 black box power cable
GTB 10 IN/OUT cable, Relay 7 (NMEA 2000), blue wire
Optional switch. Must be turned on for remote operation
NMEA 2000 power relay (one 12 V relay included)
Power source
NMEA 2000 device, affected by the relay
NMEA 2000 power cable, for the side of the network not affected by the relay
NMEA 2000 device, not affected by the relay
NMEA 2000 drop cable
NMEA 2000 power cable, connected to the relay
NMEA 2000 power isolator
Negative control wire, white
Positive control wire, black
Negative load wire, blue
Positive load wire, yellow
GTB 10 Specifications
Weight 0.64 kg (1.4 lb.)
Compass-safe distance 102 mm (4 in.)
Temperature range From -15° to 55°C (from 5° to 131°F)
Material Polycarbonate plastic
Water rating IEC 60529 IPX7
1
Fuse 7.5 A, 42 V fast-acting
Input voltage From 10 to 32 Vdc
Max. power usage at 10 Vdc 20 W
1
The device withstands incidental exposure to water of up to 1 m for up to 30 min. For more
information, go to www.garmin.com/waterrating.
6 Installation Instructions