Navtelekom - SIGNAL S-2551

The SIGNAL S-2551 is a rugged GLONASS/GPS vehicle tracker engineered for professional telematics and fleet management projects. Plaspy compatible out of the box, the S-2551 combines dual-SIM cellular communications, support for EGTS and FLEX/FLEX 2.0 protocols, and extensive I/O to deliver reliable real-time tracking, telemetry and advanced diagnostics for vehicles and mobile assets.

Designed for integrators and fleet operators who need flexible sensor support and secure data delivery, the SIGNAL S-2551 supports external GNSS and GSM antennas, optional microSD logging, USB configurator access and a built-in Li‑Po backup battery. Its broad interfaces (CAN J1939, RS‑232/485, 1‑Wire) and configurable alarm and immobilizer functions make it a strong choice for Plaspy-based anti-theft, telemetry and operational intelligence deployments.

Key Highlights

• Plaspy compatible for seamless real-time tracking and telemetry integration into your monitoring platform.
• Dual SIM, SMS and GPRS with TCP/UDP transport and support for EGTS and FLEX/FLEX 2.0 protocols for robust data delivery.
• Extensive I/O: RS‑232, RS‑485, CAN J1939, 1‑Wire, 3 analog & 3 discrete inputs, 2 frequency inputs and up to 4 configurable control outputs.
• Built‑in Li‑Po backup battery (~800–850 mAh) providing up to six hours of autonomous operation and USB charging support.
• Onboard accelerometer with crash/impact detection, EcoDriving analytics and accident profile recording (GOST/ASI).
• High-capacity logging: internal storage for ~28,000 records and optional microSD (up to 32 GB) for extended local archival.
• IP54 ABS enclosure and vehicle-grade power range (8.5–48 V) with high-voltage transient protection.

How It Works with Plaspy

Integrating the SIGNAL S-2551 with Plaspy is straightforward: the tracker transmits GNSS position and rich telemetry over cellular channels to Plaspy servers using supported protocols. Plaspy ingests location, I/O status, and sensor telemetry for real-time tracking, historical replay and rule-based alerts. The device can push data to up to three simultaneous servers, enabling redundant delivery and parallel integrations.

• Real-time location and telemetry updates via GPRS (TCP/UDP) and SMS where configured.
• Telemetry channels include digital I/O states, analog sensor readings and CAN J1939 vehicle bus data for engine and diagnostic parameters.
• Crash and impact events (accelerometer) are reported for accident profiling and emergency alerts.
• Immobilizer control and driver identification via 1‑Wire TouchMemory keys are available for anti-theft and access control workflows.
• Optional Bluetooth and audio modules extend Plaspy integration to Bluetooth sensors and hands‑free or listening functions when installed.

Technical Overview

Use Cases

• Fleet management and real-time vehicle tracking: monitor routes, idle time, engine hours and EcoDriving metrics through Plaspy dashboards.
• Anti-theft and immobilization: driver identification and immobilizer via proximity cards plus configurable alarm modes for unauthorized movement.
• Telemetry and remote diagnostics: collect CAN J1939 and analog sensor telemetry for preventive maintenance and fuel monitoring when a fuel-level sensor is attached.
• Accident detection and safety: accelerometer-based crash and impact reporting with GOST/ASI profile logging to support incident investigation.
• Attachments and auxiliary sensors: integrate Bluetooth sensors, temperature probes or door/alarm contacts through the device’s analog/discrete inputs and 1‑Wire interface.

Why Choose This Tracker with Plaspy

The SIGNAL S-2551 pairs advanced vehicle telematics hardware with flexible data transport to make a reliable Plaspy compatible solution for demanding fleet and security projects. Its wide input/output array, CAN J1939 support and external antenna options enable deep vehicle integration and rich telemetry collection, while dual SIM and multi-server telemetry delivery improve uptime and data redundancy. Built-in crash detection, immobilizer support and configurable alarms add important anti-theft and safety capabilities for enterprise deployments.

For integration teams, the S-2551 offers practical remote management (GPRS/CSD updates) and local USB configuration with provided firmware and documentation. The device’s durable power design (8.5–48 V range and Li‑Po backup) and IP54 enclosure make it suitable for vehicle installations where continuity and resilience matter. Note: this specific model is listed as discontinued in the manufacturer’s product archive; consult the manufacturer or authorized distributor for current availability, firmware and documented compatibility with Plaspy deployments.