Zonar TTU-2830 Lights, Wiring and Technical Information

How Do You Read the TTU-2830 Lights?

The TTU-2830 has two LEDs. The orange light reports the cellular connection and the green light reports GPS. Solid orange and solid green together is the ideal state. Blinking means the unit is still searching or not fully registered. Tap any pattern to watch it and hear what it means, or play a normal power-up.

🔇 The TTU-2830 has no beeps of its own. Watch the two lights.

Easy way to remember it: orange is the phone, green is the satellites, and both solid is done. An optional driver buzzer can be added for driver alerts.

Tap a light pattern to see it

Each button plays the pattern on the drawing above, says out loud what it means, and tells you what to do.

Cellular light (orange)GPS light (green)Both lights

What Does Each TTU-2830 Light Mean?

Light	Pattern	Meaning
Both	Off	Modem off
Both	Solid green and solid orange	Ideal connection
Orange	Slow blink	Searching
Orange	Fast blink	Network available
Orange	Solid	Registered and receiving acknowledgements
Orange	Alternating solid and fast	Registered but no acknowledgement
Green	Blinking / solid	Searching for GPS / GPS fix

What Does a Normal TTU-2830 Install Look Like?

Mount first. Somewhere secure with no metal above it, away from heater vents, engine heat and moisture.
Three wires. Red to constant 12 or 24 V (7 to 32 V), black to chassis ground, white to a true ignition source that reads 0 V with the vehicle off, through a 3 A inline fuse. Insulate every unused wire.
Power up outdoors. Away from garages and tall buildings. The lights blink while searching.
Wait for solid. Solid orange and solid green. A GPS lock can take up to five minutes; if nothing happens after a minute or two of waiting, reposition the unit and try again.
Verify. Turn the ignition on for two minutes, then off, and confirm in the account that the location is right and the last event reads Ignition Off. If not, take a five-minute drive and check again.

How Is the TTU-2830 Wired?

Wire	Function
Red	Constant power, 12 to 24 V
Black	Chassis ground
White	Ignition, 0 V with the vehicle off
Blue	Input 1 (grounded = on)
Orange	Input 2
Green	Output 0, starter disable
Brown	Output 1, also drives the optional buzzer
Yellow	Output 2
White/blue	1-Bit bus data, for driver ID and temperature sensors

Inputs. Input 1 turns on when the blue wire is grounded and off when the circuit opens. A door switch that closes when the door shuts reports door closed as input on.

Starter disable. Cut at the ignition switch: key side to the relay's red wire, starter side to its white wire, the relay's orange wire to the unit's green output 0. It blocks the next start only.

Driver ID, buzzer and temperature. The key fob reader's grey wire to the white/blue 1-Bit bus and black to the paired black wire; the buzzer's red to 12 to 24 V and black to the brown output; up to three temperature sensors on the 1-Bit bus, mounted on the trailer wall away from the reefer's airflow.

Sources: Zonar TTU-2830 installation guide, Zonar TTU-2830 spec sheet, Zonar quick start guide. ZONAR is a trademark of Zonar Systems, Inc. Other product names belong to their owners. API Signal is an independent installer and is not Zonar.

Back to the TTU-2830 →Uses, options and install facts.Zonar Troubleshooting →Fixes for the most common Zonar install problems.

What Are Common Questions About the TTU-2830 Lights and Wiring?

Does the TTU-2830 beep?

Not on its own. An optional driver buzzer can be wired to its brown output.

How long does the TTU-2830 take to get a GPS lock?

Zonar says it can take up to five minutes. If nothing locks after waiting, reposition the unit.

How do TTU-2830 inputs trigger?

Input 1 is on when the blue wire is grounded and off when the circuit is open.

TTU-2830 Technical Information