FMB920 General description

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Main Page > Basic Trackers > FMB920 > FMB920 Manual > FMB920 General description

FMB920 is a tracking terminal with GNSS and GSM connectivity, which is able to collect device coordinates and transfer them via GSM network to a server. This device is perfectly suitable for applications, which require the location acquirement of remote objects.

Package contents

The FMB920 device is supplied to the customer in a cardboard box containing all the equipment that is necessary for operation. The package contains:

  • Already implemented FMB920 device into case;
  • Top and bottom device cover parts;
  • 3.7 V 170 mAh rechargeable Li-ion battery;
  • and output power supply cable with a 1x5 connection pins, which is already installed into device.

Basic characteristics

GSM / GPRS / GNSS features:

  • Teltonika TM2500 quad band module (GSM 850 / 900 / 1800 / 1900 MHz);
  • GPRS class 12 (Up to 85,6 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;
  • Internal High Gain GNSS antenna;
  • Internal High Gain GSM antenna;
  • 128 MB Flash (422 400 Records);
  • 170 mAh Li-ion rechargeable 3.7 V battery.

Interface features:

  • Power supply: +6... +30 V;
  • 1 digital input;
  • 1 impulse input (DIN1)
  • 1 analog input;
  • 1 open collector digital output (connecting external relays, LED, buzzers etc);
  • 2 LEDs indicating device status.

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;
  • Color ribbon non-detachable cable;
  • Overvoltage protection;

Description Voltage Duration
Normal operation

+6 ... +30 V


Protection turns on, device turns off 34 V Unlimited
Maximum voltage <70 V Unlimited
Maximum voltage impulse 90 V 5ms

Technical features

Part name Physical specification
Navigation indication LED
Modem indication LED
Socket Soldered inner socket
USB Micro USB socket

Technical details
2 W max.
Current consumption at 12 V (Power supply 6...30 V DC)
GPRS: average 63.48 mA
Nominal: average 24.40 mA
GNSS sleep: average 5.58 mA
Deep Sleep: average 4.06 mA
Online Deep Sleep: average 4.62 mA
Ultra Deep Sleep: average 2.08 mA
Rated current: 250 mA
Battery charge current Average: 140 mA
Operating temperature (without battery) -40 ... +85 °C
Storage temperature (without battery) -40 ... +85 °C
Storage relative humidity 5 ... 95% (no condensation)
Device + case weight + battery weight 54 g

Dimension drawing:

FMB900-125 view dims.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 3.75~3.90 170 0.64 – 0.66 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 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)
6 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
Digital Input: 300
Digital Output (Open Drain grade):
Input resistance (DIN1) 47
Input voltage
(Recommended Operating Conditions)
0 Supply voltage V
Input Voltage threshold (DIN1) 4 V
Analog Input:
Input voltage
(Recommended Operating Conditions)
0 30 V
Input resistance 150
Measurement error on 12 V 3 %
Additional error on 12 V 360 mV
Measurement error on 30 V 3 %
Additional error on 30 V 900 mV

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