FMU126 General description

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FMU126 is small and professional real-time tracking terminal with GNSS and 3G/GSM connectivity and backup battery. Device equipped with GNSS/Bluetooth and 3G modules, internal GNSS and internal 3G antennas. FMU126 feature RS232 data interface, which gives ability to connect various third-party external devices. It is perfectly suitable for applications where location acquirement of remote objects is needed: fleet management, car rental companies, taxi companies, public transport, logistics companies, personal cars and so on.

Package contents

The FMU126 device is supplied to the customer in a cardboard box containing all the equipment that is necessary for operation. The package contains:

  • FMU126 device;
  • Input and output power supply cable with 2x6 connection pins;
  • Micro USB cable;
  • 3.7 V 1200 mAh rechargeable Li-ion battery.

Basic characteristics

GSM / GPRS / GNSS features:

  • Quectel UC15-T,Teltonika TM2500 3G(UMTS/HSPA)/2G(GSM/GPRS)/GNSS/BLUETOOTH;
  • GPRS Multi-Slot class 12 (Up to 240 kbps);
  • SMS (text, data);
  • Integrated GNSS receiver;
  • Up to -165 dBm GNSS receiver sensitivity.


Hardware features:

  • Built-in movement sensor;
  • Built-in Bluetooth 4.0 LE;
  • Internal High Gain GNSS antenna;
  • Internal High Gain GSM antenna;
  • Internal flash memory 128MB (422 400 Records);
  • 1200 mAh Li-ion rechargeable 3.7 V battery (4.44 Wh).


Interface features:

  • Power supply: +10... +30 V;
  • 2 digital inputs;
  • 1 analog input;
  • 2 open collector digital output (connecting external relays, LED, buzzers etc);
  • 1-Wire temperature sensor;
  • 1-Wire iButton;
  • LVCAN RX (INPUT 5);
  • LVCAN TX (INPUT 6);
  • 1 RS-232 interface;
  • 2 LEDs indicating device status.
  • Integrated buzzer

Special features:

  • Fast position fix (Outdoor areas);
  • High Quality track even in high density urban canyon;
  • Ultra small case;
  • Ready for harsh environment;
  • Easy to mount in limited access areas;
  • Firmly fasten;
  • 2 LED status indication;
  • Real time tracking;
  • Smart data acquisition based on:
    • Time;
    • Speed;
    • Angle;
    • Distance;
    • Ignition or any other I/O event;
  • Sending acquired data via GPRS;
  • GPRS and SMS I/O events;
  • Virtual odometer;
  • Jamming detection;
  • Configurable using Secured SMS Commands;
  • 2xSIM Card (Dual-SIM)
  • Overvoltage protection;

Technical features


Part name Physical specification
Navigation indication LED
Modem indication LED
Socket Soldered inner socket
USB Micro USB socket
GNSS External GNSS antenna
GSM Internal GSM antenna


Technical details
2 W max.
Current consumption at 12 V (Power supply 10...30 V DC)
GPRS: average 64.59 mA rms
Nominal: average 37.77 rms
GNSS sleep: average 11.1 mA
Deep Sleep: average 6.2 mA
Online Deep Sleep: average 6.5 mA
Battery charge current Average 240 mA
Operating temperature (without battery) -40..+85 °C
Storage temperature (without battery) -40..+85 °C
Storage relative humidity 5..95% (no condensation)
Device + case + battery weight 52 g


Dimension drawing:

FMU126-Dimensions.png

Technical information about internal battery


Internal back-up battery Battery voltage (V) Nominal capacity (mAh) Power (Wh) Charge temperature (°C) Discharge temperature (°C) Storage temperature (°C)
Li-ion rechargeable battery 3.8~4.1 1200 4.44 0 to +45 -20 to +60 -20 to +45 for 1 month
-20 to +35 for 6 months

Batteries are covered by 6 month warranty support.

Bw nb.png CAUTION: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
Bw disposal.png Battery should not be disposed of into general household waste.
Bring damaged or worn-out batteries to your local recycling center or dispose them into a battery recycle bin commonly found in supermarkets.

Electrical characteristics


Characteristic description Value
Min. Typ. Max. Unit
Supply Voltage:
Supply Voltage
(Recommended Operating Conditions)
+10 +30 V
Digital Output (Open Drain grade):
Drain current (Digital Output OFF) 120 µA
Drain current
(Digital Output ON, Recommended Operating Conditions)
0.1 0.5 A
Static Drain-Source resistance
(Digital Output ON)
400 600
Digital Input:
Input resistance (DIN1) 47
Input resistance (DIN2) 51.7
Input resistance (DIN3) 47
Input voltage
(Recommended Operating Conditions)
0 Supply voltage V
Input Voltage threshold (DIN1) 7.5 V
Input Voltage threshold (DIN2) 2.5 V
Input Voltage threshold (DIN3) 2.5 V
Analog Input:
Input voltage
(Recommended Operating Conditions), Range 1
0 +10 V
Input resistance, Range 1 150
Measurement error on 12V, Range 1 3 %
Additional error on 12 V, Range 1 360 mV
Measurement error on 30 V, Range 1 3 %
Additional error on 30 V, Range 1 900 mV
Input Voltage
(Recommended Operating Conditions), Range 2
0 +30 V
Input resistance, Range 2 150
Measurement error on 12V, Range 2 3 %
Additional error on 12 V, Range 2 360 mV
Measurement error on 30 V, Range 2 3 %
Additional error on 30 V, Range 2 900 mV
Output Supply Voltage 1-Wire:
Supply voltage +4.5 +4.7 V
Output inner resistance 7 Ω
Output current (Uout > 3.0 V) 30 mA
Short circuit current (Uout = 0) 75 mA
Ground sense:
Input resistance 38.45
Input voltage
(Recommended operating conditions)
0 Supply voltage V
Input voltage threshold 0.5 V
Sink current 180 nA


CAN interface:
Internal terminal resistor CAN bus
(no internal termination resistor)
- - - Ω
Differential input resistance 19 30 52
Recessive output voltage 2 2.5 3 V
Differential receiver threshold Voltage 0.5 0.7 0.9 V
Common mode input voltage -30 - 30 V


Alert.png
Analog Input error margin can increase if temperature varies.

Absolute maximum ratings

Characteristic description Value
Min. Typ. Max. Unit
Supply Voltage
(Absolute Maximum Ratings)
-32 +32 V
Drain-Source clamp threshold voltage
(Absolute Maximum Ratings), (Idrain = 2 mA)
+36 V
Digital Input Voltage
(Absolute Maximum Ratings)
-32 +32 V
Analog Input Voltage
(Absolute Maximum Ratings)
-32 +32 V