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INDUSTRIAL . IOT . AVIATION

Remote Terminal Unit (RTU)

Power electronics

Interface PCB

Metal enclosure

Wire harness

🌐 Client: Malaysia

📄 PRODUCT OVERVIEW

A complete Remote Terminal Unit system for NNA System Solution's STRIX station management platform, deployed across remote aviation sites in Malaysia. Each RTU monitors and reports real-time status of critical equipment, room temperature, and power conditions at unmanned remote stations, communicating back to a central server exclusively over 4G wireless — requiring no on-premise wired network infrastructure. The system was deployed across 140 sites in 2022 and has been running without major breakdown to date.

🔧 DESIGN BACKGROUND

NNA System Solution had built their STRIX platform using a PLC, Raspberry Pi 3 Model B+, a 4G router, and backend software. They approached Jaavin to design and build two custom PCBs, a metal enclosure in two variants, and handle full box assembly with wire harness fabrication. Jaavin delivered the complete system from concept to production in six months — covering schematic design, PCB layout, prototype build, mechanical design, metal fabrication, and 140-unit production.

Variant A - 2U Rack

Rack-mount enclosure for server room or equipment rack installation. Houses Interface PCB, Power PCB, PLC, Raspberry Pi, 4G router, SMPS and batteries in a compact 2U form factor with front-panel terminal blocks for field wiring.

Variant B - Cabinet

Lockable wall/pole-mount cabinet for outdoor or remote site deployment. Same electronics as Variant A with external antenna ports for 4G connectivity and internal panel terminal access.

➡️| INPUTS

  • 8× digital inputs (field equipment → PLC)

  • 8× analogue inputs (field equipment → PLC)

  • External digital sensor (→ Raspberry Pi)

  • 220Vac mains power

  • 24Vdc SLA battery (backup)

 |➡️ OUTPUTS

  • 8× digital outputs (PLC → field equipment)

  • 5Vdc (Raspberry Pi & internal circuits)

  • 9Vdc (4G router)

  • 24Vdc (PLC)

  • Remote power reset signal

📷 PROJECT PHOTOS
📝KEY FEATURES & CAPABILITIES

  • Interface PCB: 8× digital inputs from field equipment to PLC with LED indication

  • Interface PCB: 8× digital outputs from PLC to field equipment with LED indication

  • Interface PCB: 8× analogue inputs from field equipment to PLC

  • Interface PCB: external digital sensor interface to Raspberry Pi

  • Power PCB: 220Vac mains input with internal 24Vdc SLA battery backup

  • Power PCB: seamless automatic switchover to battery on mains failure

  • Power PCB: internal battery charging with low-battery cut-off protection

  • Power PCB: 5Vdc regulated output for Raspberry Pi and internal circuits

  • Power PCB: 9Vdc regulated output for 4G router

  • Power PCB: 24Vdc regulated output for PLC

  • Power PCB: remote power reset for PLC, Raspberry Pi and 4G router on command

  • 4G wireless connectivity — no on-premise wired network required

  • Variant A: 2U rack-mount metal enclosure for equipment room deployment

  • Variant B: cabinet-type metal enclosure for wall/pole mounting at remote sites

  • Custom label stickers and panel graphics designed and applied

  • Full wire harness fabrication and box assembly by Jaavin

  • 140 units deployed at aviation remote stations across Malaysia in 2022

🛠️CORE SERVICES DEPLOYED

  • PCB Design (Interface PCB + Power PCB)

  • Mechanical Design & Metal Enclosure Fabrication (2 variants)

  • Wire Harness Fabrication

  • Prototyping & Pilot Run

  • Volume Production (140 units)

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