Device Manual of Discovery 4G Plus: Difference between revisions
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Revision as of 04:27, 2 August 2025
Discovery 4G Plus is a tracking terminal with GNSS and GSM connectivity, capable of collecting device coordinates and transmitting them via the GSM network to a server. It is ideal for applications requiring remote object tracking.
Package Contents
- DISCOVERY 4G 485 device
- Input/output power cable with 2x6 connection pins
- 3.7V 350 mAh rechargeable Li-PO battery
Basic Characteristics
GSM / GPRS / GNSS Features
- Name: Quectel EC200U-CN
- Technology: LTE (Cat1), 2G (GSM/GPRS), GNSS, Bluetooth
- SMS (text) support
- Integrated GNSS receiver
- Sensitivity: up to -149 dBm
Cellular
| Network Mode | Frequency Band |
|---|---|
| LTE-FDD | B1/B3/B5/B8 |
| LTE-TDD | B34/B38/B39/B40/B41 |
| GSM | 900/1800 MHz |
| GNSS | GPS, GLONASS, BeiDou, Galileo, QZSS |
| Bluetooth | 4.2 |
Transmit Power
- Class 4 for GSM850/900: 23±2 dBm
- Class 1 for GSM1800/1900: 20±2 dBm
- Class 3 for LTE-FDD and LTE-TDD bands
Hardware Features
- Built-in movement sensor
- Built-in Bluetooth 4.2 LE
- Internal High Gain GNSS and GSM antennas
- Internal flash memory 4MB (32,768 records)
- 350 mAh Li-Po rechargeable 3.7V battery
Interface Features
- Power Supply: +9V to +90V DC
- Digital Inputs: 3 (DIN1, DIN2, DIN3)
- Analog Inputs: 3 (multiplexed with digital outputs)
- Digital Outputs: 3 (multiplexed with analog inputs)
- 1-Wire Interface: Supports temperature sensors
- Status Indicators: 4 LEDs (Navigation, Modem, Power, User)
Special Features
- Fast GNSS fix (outdoor)
- Reliable tracking in urban environments
- Compact and rugged design
- Real-time tracking
- Smart data acquisition based on:
- Time, Speed, Distance, Ignition or I/O events
- Data transmission via GPRS
- Configurable via secured SMS
- 1x Micro SIM
- Overvoltage protection: YES
Electrical Specifications
| Description | Voltage | Duration |
|---|---|---|
| Normal operation | +9 to +90 V | Unlimited |
| Protection activates, device off | 90 V | Unlimited |
| Maximum voltage | < 90 V | Unlimited |
Technical Details
- Battery charge current: Avg. 140 mA
- Operating temp (without battery): -40°C to +85°C
- Storage temp (without battery): -40°C to +80°C
- Operating temp (with battery): -20°C to +70°C
- Storage temp (with battery): -20°C to +40°C
- Humidity: 5% to 95% non-condensing
- Ingress Protection: IP54
- Weight (device + battery): 60 g
- Internal fuse: 3A, 100V
Mechanical
- Dimensions: 85mm x 66mm x 20mm (L × W × H)
- Enclosure: Polycarbonate
LED Indications
| Function | Indicator |
|---|---|
| Navigation | LED (Orange) |
| Modem | LED (Green) |
| Power | LED (Red) |
| User Status | LED (Red) |
Internal Battery Specifications
| Property | Value |
|---|---|
| Type | Li-Po rechargeable battery |
| Voltage | 3.75 – 4.2 V |
| Capacity | 350 mAh |
| Power | 0.64 – 0.66 Wh |
| Charge Temp | 0°C to +45°C |
| Discharge Temp | -20°C to +60°C |
| Storage Temp | -20°C to +45°C (15 days); -20°C to +35°C (90 days) |
⚠️ CAUTION: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
Do not discard batteries in household waste. Use recycling bins or drop-off centers.
Electrical Characteristics
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage | +9 | – | +90 | V |
| Digital Output Voltage | 10 | – | 60 | V |
| Drain Current (OFF) | – | – | 120 | µA |
| Input Resistance (DIN1–3) | – | 2.2K | – | Ω |
| Input Voltage Threshold (DIN1–3) | 10 | – | – | V |
| Analog Inputs | ||||
| Voltage Range | 0 | – | +10 | V |
| Resistance | – | 2.2K | – | Ω |
| Measurement Error | – | – | 2 | % |
| 1-Wire Interface | ||||
| Output Voltage | – | 4.5 | – | V |
| Inner Resistance | – | 7 | – | Ω |
| Output Current (Uout > 3V) | – | 30 | – | mA |
| Short-Circuit Current | – | 75 | – | mA |
Other Features
- Remote reset via SMS/GPRS
- Supports 2 IPs simultaneously
- Firmware Over-The-Air (FOTA)
- Configuration Over-The-Air (COTA)
- Geo-fence (Circular/polygonal)
- Protocols: TCP/IP, HTTP, SMS
- Memory: 40,000+ positional logs
- SMS fallback if GPRS unavailable
- Backup battery runtime: >1 hour
- Dual SIM support: Micro SIM + optional eSIM
- Alerts: battery disconnection/reconnection, over-speed, ignition, geo-fence, tilt, panic, etc.
- External voltage monitoring
- Optional interfaces: 1-Wire, RS485, Immobilizer/Buzzer
Absolute Maximum Ratings
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage | +9 | – | +90 | V |
| Drain-Source Clamp Threshold | – | – | +60 | V |
| Digital Input Voltage | – | – | +10 | V |
| Analog Input Voltage | 0 | – | +10 | V |
⚠️ Note: Analog input error margin may increase with temperature variation.