Overview
Scalable Control of 300 Andon Lights Using LoRaWAN
In process plants and industrial manufacturing environments, Andon lights act as the first line of visual safety indication. They instantly communicate machine status, faults, quality issues, and operator assistance requests often in noisy, fast-moving, and safety-critical areas.
As plants expand, maintaining clear visual indication across multiple zones becomes challenging. Traditional Andon systems rely heavily on hardwired connections, PLC expansions, and extensive cable routing, which significantly increase installation cost, deployment time, and system downtime. In many cases, adding or relocating even a single Andon point requires shutdowns, rewiring, and engineering rework.
Manufacturers increasingly need fast-to-deploy, centrally controlled visual alert systems that enhance safety without disrupting ongoing operations. Wireless control technologies like LoRaWAN enable Andon lights to be managed without extensive cabling, reducing both capital expenditure and commissioning time.
By eliminating complex wiring and enabling remote, server-driven control, modern Andon light solutions ensure clear visual alerts, faster response, and improved shop-floor safety all while keeping the system cost-effective and scalable for large industrial deployments.
The starting point
The Hidden Problem with Traditional Andon Light Control in Large Industrial Plants
In modern manufacturing environments, Andon lights are more than signal towers. They are critical visual safety systems that communicate machine faults, production delays, quality issues, and operator assistance requests in real time.
But while the Andon light itself is simple, controlling hundreds of them inside a growing factory is not.
As industrial facilities scale beyond 50, 100, or even 300 Andon points, traditional wired control architectures begin to fail not electrically, but structurally.
The real problem is infrastructure.
Traditional Andon systems depend on hardwired PLC outputs and relay-based control.
For every Andon point, industries must install:
- Dedicated control wiring
- Cable tray routing
- Panel I/O allocation
- Terminal block connections
01
Time-Consuming Operations
Manual switching of lights and controllers caused delays and operational inefficiency.
02
Energy Wastage
Lights often remained on unnecessarily, increasing energy costs and carbon footprint.
03
Integration Challenges
Existing lights systems were not remotely controllable, limiting automation capabilities.
04
Limited Visibility & Control
Plant managers had no real-time oversight of lighting status, leading to reactive decision-making.
The approach
Industrial Wireless Andon Control Using LoRaWAN
To eliminate wiring complexity while maintaining industrial reliability, we designed a scalable wireless Andon control system built on a structured industrial communication backbone.
Instead of directly wiring each Andon light to PLC outputs, we introduced a layered architecture:
Andon Lights → 32-Channel RS485 Relay → RS485 to LoRaWAN Datalogger → Central Server
This approach allows precise, individual control of every Andon light without expanding panel I/O or installing new wiring infrastructure.
01
MacSync RS485 Nodes
Configured to write RS485 registers and control individual relays remotely.
02
Seamless Modbus Integration
Connected with existing Modbus-enabled relay boards without modifying the infrastructure.
03
LoRaWAN Connectivity
Enabled long-range, low-power wireless communication across the industrial plant.
04
Centralized Control Dashboard
Plant managers gained real-time visibility and control over all lighting zones.
05
Automated Scheduling
Lights could now be switched on/off or dimmed based on operational schedules.
06
Energy Optimization
Remote control and automation reduced energy wastage and lowered operational costs.
How it fits together
System Architecture Diagram for LoRaWAN-Based Andon Light Control System Architecture
On site
Deployment: Simplified Wiring, Seamless Integration, & Cost-Efficient Andon Control
Drastic Reduction in Wiring Infrastructure
In conventional systems, each Andon light requires:
- Individual control wiring
- PLC I/O allocation
- Long cable routing through trays
- Panel-level termination
With our RS485 LoRaWAN Converters + LoRaWAN architecture:
- Only short-distance wiring is required from Andon light to local 32-channel relay
- No long cable runs across plant zones
- No centralized wiring congestion
- No new PLC output expansion
Wiring is contained locally within the panel.
The wireless LoRaWAN network handles long-distance communication.
This reduces:
- Copper consumption
- Cable tray load
- Installation time
- Electrical risk points
The plant infrastructure remains clean and manageable.
In this deployment
Configured to write to RS485 registers on the 32-channel relay boards, enabling remote control of lights.
Provided long-range, low-power connectivity, linking all nodes to the central control system.
32-channel relay boards, enabling remote control of light using the MacSync
Allowed real-time monitoring, relay status checks, and automated lighting schedules for all zones.
What stood in the way
Deployment Challenges in Large-Scale Wireless Andon Light Systems
01
Complex RS485 Modbus Integration
Configuring MacSync RS485 nodes to communicate with 32-channel Modbus-enabled relay boards required precision for seamless industrial IoT control.
02
LoRaWAN Signal Interference
Dense metal structures and machinery caused potential communication issues, solved with optimized gateway placement and high-gain antennas.
03
Scalable Node Management
Managing multiple industrial lighting zones demanded efficient node configuration, monitoring, and network reliability.
04
Low-Latency Real-Time Control
Instant response for lighting commands across the plant required a robust LoRaWAN network and fast data transmission.
Put to the test
Testing and Validation: Ensuring Reliable Wireless Andon Control in Harsh Industrial Environments
RS485 Communication Verification
Tested MacSync nodes writing to Modbus registers for all 32-channel relay boards to ensure accurate command execution.
LoRaWAN Network Stability
Validated long-range, low-power connectivity across the plant, ensuring consistent, real-time control.
Operational Stress Testing
Continuous monitoring over multiple weeks ensured system stability, minimal downtime, and scalability.
Automated Schedule Testing
Simulated lighting schedules and automated triggers to confirm energy-efficient operation.
4 of 4 tests completed
What changed
Industry Impact: Transforming Visual Control and Shop-Floor Visibility with Wireless Andon Systems
Remote Industrial Lighting Control
Enabled real-time control of 32-channel RS485 Modbus relay boards, reducing manual intervention and improving plant efficiency.
Significant Energy Savings
Automated schedules and remote switching lowered electricity consumption and reduced operational costs.
Real-Time Operational Visibility
Central dashboards provided instant insights into lighting status across the factory for data-driven management.
Scalable Smart Factory Solution
LoRaWAN network allows future expansion, supporting additional lighting zones or other plant automation systems.
In closing
Conclusion: Measurable ROI Through Visibility, Safety, and Scalable Wireless Andon Control
The LoRaWAN-based wireless Andon light control system delivered strong ROI by improving operational visibility, enhancing worker safety, and significantly reducing wiring and infrastructure costs compared to traditional wired industry standards.
By eliminating extensive cabling and PLC expansions, the solution enabled scalable control of 300+ Andon lights with minimal downtime, simplified integration, and lower long-term maintenance overhead.
Proven reliable in harsh industrial environments, this cost-effective and centrally managed wireless Andon system is setting a new benchmark for industrial automation, encouraging manufacturers to adopt scalable LoRaWAN-based visual alert solutions across their facilities.
What’s next
