---
lang: en
title: "Danger zone monitoring around robots, cranes and machines"
url: https://nabrio.com/use-cases/danger-zone-monitoring
canonical: https://nabrio.com/use-cases/danger-zone-monitoring
updated: 2026-10-27
publisher: Nabrio Co., Ltd. (nabrio.com)
---

# Danger zone monitoring around robots, cranes and machines

Nara detects people inside the danger zones you draw around robot cells, cranes and machines. It can act only while the machine is running, read over Modbus, and it sounds an alarm, slows or stops the machine through the PLC, and logs the event.

- Sectors: [Manufacturing](https://nabrio.com/industries/manufacturing.md), [Buildings and security](https://nabrio.com/industries/buildings-security.md)
- What it takes: Ready to configure. Works with Nara’s built-in models. You set up the zones, rules and outputs.
- Products: [Nara](https://nabrio.com/nara.md)

## The problem

People enter robot cells, crane zones or machine areas while the equipment is running.

## How it works

- **Input:** Camera over the machine area
- **Process:** People detection in drawn danger zones, optionally only while the machine runs (read over Modbus)
- **Action:** Alarm, slow or stop the machine through the PLC, log the event

Draw the danger zones on the camera view. Nara detects people in each zone and, if you want, reads the machine’s running state over Modbus so it only reacts while the machine is moving. When someone enters, it switches the alarm, writes a slow-down or stop signal to the PLC, and logs the event with an image.

## Variations

### Robot cells, cranes and machines

People detection in drawn zones around moving equipment, optionally only while the machine runs, with alarm and PLC stop signals.

### Height risk and climbing

People detection and pose in zones near edges and railings, with an immediate alert when someone climbs or enters a height-risk area.

### Blocked walkways and fire exits

A zone on the pathway raises an alert when an object stays there longer than a set time, with an evidence image for the area owner.

## What you need

- A camera covering the machine area
- A PLC reachable over Modbus for machine state and stop signals
- Optional: a tower light or siren

## Nara building blocks

- Camera nodes
- People detection
- Zones
- Modbus read and write
- Tower light
- Database table
- Dashboard

AI models: [People detection](https://nabrio.com/nara/ai-models.md), [Object tracking and analytics](https://nabrio.com/nara/ai-models.md)

## What it improves

- Near misses
- Incident response time
- Safety compliance

## Frequently asked questions

### Is there a guide for setting it up?

Yes. The free “Danger zone monitoring” course on help.nabrio.com walks through the flow step by step.

### Can we use the cameras we already have?

Usually, yes. Nara reads standard IP cameras over RTSP, as well as Basler industrial cameras, USB webcams and video files.

## Related use cases

- [PPE detection](https://nabrio.com/use-cases/ppe-detection.md)
- [Fall detection](https://nabrio.com/use-cases/fall-detection.md)
- [Robot and AMR orchestration](https://nabrio.com/use-cases/robot-and-amr-orchestration.md)

Talk to us about danger zone monitoring: sales@nabrio.com. [Download Nara](https://nabrio.com/download.md).