®
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Revision 1.2
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2.3.1 Connecting Attached Gray Cable to Analog Gauge or Tank Sender
The TLA100 can be used together with an analog gauge(s) (referred to as
NMEA 2000
®
/
Analog Gauge Mode
), or it can be used stand-alone (referred to as
NMEA 2000
®
Mode
) to
power and sense the resistive sender without an analog gauge(s). Connecting the TLA100’s
attached gray cable depends on how the TLA100 will be used. If you are using the TLA100
with an analog gauge(s) then refer to Section 2.3.1.1 and skip Section 2.3.1.2. If you are using
the TLA100 as a stand-alone adapter without attaching an analog gauge, then skip Section
2.3.1.1 and refer to Section 2.3.1.2.
2.3.1.1
Connecting Attached Gray Cable to Analog Gauge
Connecting the TLA100’s permanently attached gray cable to the analog gauge does not
require the removal of any wires between the gauge and the tank. All connections normally
made between the gauge and tank stay in place and the TLA100 is simply connected to the
terminals on the back of the gauge.
Not including the gauge light connections, analog gauges have three connection points or
terminals: 1) power, 2) ground, and 3) sensor. The power connection may be marked with a
plus sign “+”,“+12V”, or an “I” or “IGN”, while the ground connection is usually marked with a
minus sign “-“, the earth ground symbol “
”, or a “G” for ground, and the sensor connection is
generally marked with an “S” for sensor or “G” for gauge. You might have to refer to the gauge
documentation or schematic to determine the exact function of the three gauge terminals but it
is important to distinguish which terminals are the power, ground, and sensor. Once you have
determined the terminals on the back of the gauge, connect the wires found within the
TLA100’s permanently attached gray cable as shown in Table 1 using recommended wiring
practices (i.e., ABYC, Coast Guard, NMEA, ISO, etc.).
Gauge Terminals
Wire Color
Power (+, +12V, I, IGN)
Red
Ground (-, , G)
Black
Sensor (S, G)
Green
Table 1 – TLA100 Gauge Connections
2.3.1.2 Connecting Attached Gray Cable to Tank Sender
Resistive tank senders have two terminals; 1) sensor terminal and 2) ground terminal. The
sensor terminal is usually marked with an “S” for sensor or a “G” for gauge where the ground
terminal is usually marked with a minus sign “-“. A good way to determine which terminal is the
ground is to observe which terminal is touching the metal housing; this will be the ground
terminal. The sensor terminal will be insulated from the metal housing. Once you have
determined the terminals on the resistive tank sender, connect the wires found within the
TLA100’s permanently attached gray cable as shown in Table 2 using recommended wiring
practices (i.e., ABYC, Coast Guard, NMEA, ISO, etc.).
Sender Terminals
Wire Color
Sensor (S, G)
White
Ground (-)
Black
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