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 Plaspy for integrated fleet management. This Plaspy 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 Plaspy.

Key Highlights

• Multi-network cellular connectivity (2G/3G/4G LTE) with dual SIM for uninterrupted data transmission — supports Plaspy 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 Plaspy-managed devices.
• Designed for harsh vehicle electrical environments with robust power protection and input line protection up to 200 V.

How It Works with Plaspy

When connected to Plaspy, 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. Plaspy 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 Plaspy.
• 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 Plaspy 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 Plaspy 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 Plaspy

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 Plaspy 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 Plaspy 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 Plaspy-compatible hardware.