View source for Device Manual of Discovery 2G Plus

[https://transight.com/products/discovery-series/discovery-2g-rs232/ '''Discovery 2G RS232'''] 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 2G RS232 device  
* Input/output power cable with 2x6 connection pins  
* 3.7V 350 mAh rechargeable Li-PO battery

== Basic Characteristics ==

=== GSM / GPRS / GNSS Features ===
* Technology: 2G (GSM/GPRS), GNSS  
* SMS (text) support  
* Integrated GNSS receiver  
* Sensitivity: up to -149 dBm  

=== Cellular ===
* Frequency Bands: Quad-band GSM850, EGSM900, DCS1800, PCS1900

=== Transmit Power ===
* Class 4 (2W) at GSM850 and EGSM900  
* Class 1 (1W) at DCS1800 and PCS1900

=== Hardware Features ===
* Built-in movement sensor  
* 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''': 2 (DIN1, DIN2)  
* '''Analog Inputs''': 2 (multiplexed with digital inputs)  
* '''Digital Outputs''': 2 (DO1, DO2) for external relays, LEDs, buzzers  
* '''1-Wire Interface''': Supports temperature sensors  
* '''Status Indicators''': 4 LEDs (GNSS, Network, 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 \ eSIM 
* Overvoltage protection: '''YES'''

== Electrical Specifications ==
{| class="wikitable" style="width:100%"
! style="background-color:#680022; color:white;" | Description
! style="background-color:#680022; color:white;" | Voltage
! style="background-color:#680022; color:white;" | 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  
* Resettable fuse: 3A, 100V

== Mechanical ==
* '''Dimensions''': 85mm x 66mm x 20mm (L × W × H)  
* '''Enclosure''': Polycarbonate

=== LED Indications ===
{| class="wikitable" style="width:100%";
! style="background-color:#680022; color:white;" | Function
! style="background-color:#680022; color:white;" | Indicator
|-
| GNSS || LED (Orange)
|-
| Network|| LED (Green)
|-
| Power || LED (Red)
|-
| User Status || LED (Red)
|}

== Internal Battery Specifications ==
{| class="wikitable"
! style="background-color:#680022; color:white;" | Property
! style="background-color:#680022; color:white;" | 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)
|}

<div> '''⚠️ CAUTION: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.''' </div>  
Do not discard batteries in household waste. Use recycling bins or drop-off centers.

== Electrical Characteristics ==
{| class="wikitable"
! style="background-color:#680022; color:white;" | Parameter
! style="background-color:#680022; color:white;" | Min.
! style="background-color:#680022; color:white;" | Typ.
! style="background-color:#680022; color:white;" | Max.
! style="background-color:#680022; color:white;" | Unit
|-
| Supply Voltage || +9 || – || +90 || V
|-
| Digital Output Voltage (DO1, DO2) || 10 || – || 60 || V
|-
| Drain Current (DO1, DO2 OFF) || – || – || 120 || mA
|-
| Input Resistance (DIN2) || – || 2.2K || – || Ω
|-
| Input Voltage Threshold (DIN1–2) || 90 || – || – || V
|-
! colspan="5" | Analog Inputs
|-
| Voltage Range || 0 || – || +90 || V
|-
| Resistance || – || 2.2K || – || Ω
|-
| Measurement Error || – || – || 2 || %
|-
! colspan="5" | 1-Wire Interface
|-
| Output Voltage || – || 4.5 || – || V
|}

== Other Features ==
* Remote reset via SMS/GPRS  
* Supports 2 IPs simultaneously  
* Firmware Over-The-Air (FOTA)  
* Geo-fence (Circular/polygonal)  
* Protocols: TCP/IP, HTTP, SMS  
* Memory: up to 32,768 positional logs  
* SMS fallback if GPRS unavailable  
* Backup battery runtime: 1 hour  
* SIM support: 1x Micro SIM  / eSIM
* Alerts: battery disconnection/reconnection, over-speed, ignition, geo-fence, tilt, low battery  
* External battery voltage monitoring  
* Optional interfaces: 1-Wire, RS232, Immobilizer/Buzzer

== Absolute Maximum Ratings ==
{| class="wikitable"
! style="background-color:#680022; color:white;" | Parameter
! style="background-color:#680022; color:white;" | Min.
! style="background-color:#680022; color:white;" | Typ.
! style="background-color:#680022; color:white;" | Max.
! style="background-color:#680022; color:white;" | Unit
|-
| Supply Voltage || +9 || – || +90 || V
|-
| Drain-Source Clamp Threshold || – || – || +60 || V
|-
| Digital Input Voltage || – || – || +90 || V
|-
| Analog Input Voltage || 0 || – || +90 || V
|}

'''⚠️ Note''': Analog input error margin may increase with temperature variation.