Navtelekom - СИГНАЛ S-4651 (4G)

The SIGNAL S-4651 is a professional GLONASS/GPS vehicle tracking terminal from Navtelecom designed for demanding fleet monitoring applications and is fully compatible with Green-Gps for integrated fleet management. This Green-Gps compatible tracker extends the proven S-2651 platform with 2G, 3G and 4G LTE cellular connectivity, dual SIM failover and robust vehicle-grade interfaces so fleets can maintain continuous, real-time tracking and telemetry even in challenging electrical environments.

Ideal for operators who need reliable GPS tracker performance, the S-4651 supports local data logging, extensive I/O for sensor and ignition monitoring, Bluetooth 4.0 for accessory connections, and remote firmware management. Note: the SIGNAL S-4651 is listed as discontinued/archived by the manufacturer, but technical documentation and firmware history remain available for maintenance and integration with Green-Gps.

Key Highlights

• Multi-network cellular connectivity (2G/3G/4G LTE) with dual SIM for uninterrupted data transmission — supports Green-Gps real-time tracking and alerts.
• External GLONASS/GPS and GSM antennas for improved satellite and cellular reception in vehicle installations.
• Comprehensive I/O set: six universal digital/analog inputs and four configurable control outputs for ignition, sensors, and immobilizer control.
• Multiple industrial interfaces (RS-232, RS-485, CAN bus, 1-Wire) plus MODBUS support for telemetry and third-party sensor integration.
• Local data logging on microSD (up to 32 GB) and integrated Li‑Po backup battery (800 mAh) to keep telemetry and position data intact during power interruptions.
• Bluetooth 4.0 for local configuration, accessory pairing or Bluetooth sensors/beacons integration with Green-Gps-managed devices.
• Designed for harsh vehicle electrical environments with robust power protection and input line protection up to 200 V.

How It Works with Green-Gps

When connected to Green-Gps, the SIGNAL S-4651 delivers real-time location, telemetry and event data over cellular networks so fleet managers can monitor vehicle position, status and diagnostics from a single dashboard. Green-Gps ingests GNSS coordinates, I/O events, CAN/MODBUS telemetry and local logs to produce live tracking, historical playback, geofencing alerts, and fleet reports.

• Real-time location and telemetry updates transmitted via 2G/3G/4G to Green-Gps.
• Ignition, door and alarm status via the universal digital/analog inputs for event-driven alerts and driver behavior analysis.
• Fuel monitoring and analog sensor capture using the unit’s analog inputs for fuel level sensors and other analog telemetry.
• Remote immobilizer and actuator control using configurable control outputs managed through Green-Gps commands or alerts.
• Bluetooth sensors and beacons — local accessory connection and configuration using Bluetooth 4.0 for short-range telemetry and diagnostics.

Technical Overview

Use Cases

• Fleet anti-theft and immobilization — use configurable outputs to implement remote immobilizer commands and reduce theft risk.
• Door and alarm event monitoring — monitor door sensors, alarm triggers and ignition status through digital inputs for security and compliance.
• Fuel management and consumption optimization — integrate analog fuel sensors to feed fuel monitoring and telemetry into Green-Gps reports.
• BLE sensors for temperature or motion — pair Bluetooth accessories for cargo conditions monitoring or proximity-based workflows.
• Industrial telemetry and diagnostics — leverage RS-485, CAN bus and MODBUS to capture vehicle and equipment data for proactive maintenance.

Why Choose This Tracker with Green-Gps

The SIGNAL S-4651 delivers a balance of connectivity, I/O flexibility and vehicle-grade protection that makes it a strong candidate when integrating GPS trackers with Green-Gps for comprehensive fleet management. Its multi-network cellular modem, dual SIM design and local logging reduce data loss and downtime, while the extensive interface set (CAN, RS-232/485, 1-Wire, analog inputs) enables deep telemetry, fuel monitoring and ignition/immobilizer control. Bluetooth 4.0 adds local configuration and accessory support, and remote firmware management through Navtelecom’s DRC simplifies lifecycle maintenance.

For operators using Green-Gps who require robust, extensible vehicle telemetry, the SIGNAL S-4651 provides proven capabilities and documentation support even though the model is archived. Its combination of real-time tracking, telemetry integration, anti-theft features and industrial interfaces makes it a practical option for fleet management, asset protection and telemetry projects that need reliable Green-Gps-compatible hardware.