Teltonika FMC920 Wiring Guide: Complete Installation, Pinout, and Setup
The Teltonika FMC920 is a compact LTE/GNSS tracking device widely used in cars, trucks, buses, and heavy equipment. Correct wiring ensures stable tracking, accurate ignition detection, and reliable data. This guide explains the FMC920 wiring diagram, pinout, and installation steps clearly.
What is the Teltonika FMC920?
The FMC920 is a 4G LTE GPS tracker with GNSS support (GPS, GLONASS, Galileo). It is compact, easy to hide, and supports multiple I/O options for ignition detection, fuel monitoring, immobilizer control, and driver behavior analysis.
Common applications:
- Fleet management
- Car rental and leasing
- Construction machinery tracking
- Logistics and delivery vehicles
- Anti‑theft and security systems
FMC920 Wiring Diagram and Pinout
The FMC920 uses a 5‑wire harness. Each wire has a specific function:
- Red – Power supply +10–30 V DC
- Black – Ground (GND)
- Yellow – Digital Input 1 (DIN1)
- Grey – Analog Input 1 (AIN1)
- White – Digital Output 1 (DOUT1)
Red Wire – Power Supply
The red wire powers the FMC920. It must be connected to a constant voltage source.
Best practices:
- Use a 1 A fuse near the power source.
- Connect to a stable, unswitched power line.
- Avoid thin accessory wires.
Black Wire – Ground (GND)
A solid ground ensures stable operation and prevents resets.
Best practices:
- Use a clean chassis ground.
- Remove paint for metal‑to‑metal contact.
- Avoid random bolts with poor grounding.
Yellow Wire – Digital Input 1 (DIN1)
DIN1 is used mainly for ignition detection.
Common uses:
- Ignition (ACC)
- Door switch
- Panic button
- Handbrake/PTO
Grey Wire – Analog Input 1 (AIN1)
AIN1 reads variable voltage signals.
Common uses:
- Fuel level sensor
- Battery voltage monitoring
- Temperature/pressure sensors
White Wire – Digital Output 1 (DOUT1)
DOUT1 controls external devices.
Common uses:
- Immobilizer relay
- Buzzer
- LED indicator
Installation Steps
1. Mount the device
- Hide inside dashboard
- Label side up for GNSS
- Avoid metal surfaces
2. Connect power and ground
- Red → constant power
- Black → clean ground
3. Connect ignition (DIN1)
- Yellow → ACC line
- Configure in Teltonika Configurator
4. Optional sensors
- Grey → analog sensors
- White → relay/buzzer
5. Secure wiring
- Use cable ties
- Keep away from high‑current wires
6. Configure device
- Set APN, server, I/O behavior
Conclusion
The Teltonika FMC920 delivers excellent tracking performance when wired correctly. Following this guide ensures stable power, accurate ignition detection, and reliable sensor integration.
Frequently Asked Questions (FAQ)
1. How do I connect power to the Teltonika FMC920?
Connect the red wire to a constant +12V or +24V source and protect it with a 1A fuse. Connect the black wire to a clean chassis ground.
2. Which wire is used for ignition detection?
The yellow wire (DIN1) is used for ignition detection. Connect it to the ACC line and configure it in Teltonika Configurator.
3. Can the FMC920 read fuel level sensors?
Yes. The grey wire (AIN1) can read analog fuel level sensors, but calibration may be required.
4. What is DOUT1 used for?
The white wire (DOUT1) controls external devices such as relays, buzzers, or immobilizers.
5. Where should I mount the FMC920?
Mount it inside the dashboard with the label side facing up for the best GNSS signal.
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📄 Download Teltonika FMC920 Wiring Guide (PDF)
Download the complete Teltonika FMC920 wiring diagram, pinout, and installation guide in PDF format for offline use.
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