Mobeye CM4000 Series

Open Collector Output on Mobeye Devices – Frequently Asked Questions

Introduction

This FAQ page explains how the open collector output on Mobeye devices operates and how it can be used in practical installations. It describes the electrical behaviour of the output, the available voltage and current, and how external equipment can be connected safely. The information is intended to help installers and system integrators understand when and how the open collector output can be used, and which limitations apply.

FAQs

What is an open collector output?

An open collector output is a type of electronic switch mounted on the printed circuit board of a Mobeye device. It provides an output voltage that can be controlled electronically by changing a resistance value within the circuit.

How does the open collector output work?

The output status is determined by the resistance in the circuit. It can be either grounded or floating, meaning the circuit is open and disconnected. When the resistance is high, no current flows through the circuit.

How is the output controlled by the Mobeye software?

The Mobeye software can reduce the resistance to zero, for example after an alarm event or an incoming command. When this happens, the output opens and becomes active.

What voltage is available on the open collector output?

The output voltage is continuous and equals the external power supply connected to the Mobeye device, which is typically 12 V. This voltage is present on the output when it is active.

Can external devices be powered from the open collector output?

Yes, an external device connected to the open collector output can use the 12 V output as its input voltage, provided the current does not exceed 200 mA.

What should be used for devices with higher power requirements?

For devices that require more current, a relay must be used. In this case, the open collector output controls the relay, and the relay switches the heavier load safely.

Does the open collector output work with all Mobeye devices?

No, the open collector output does not function when the Mobeye device is powered by a 6 V battery. It requires an externally powered Mobeye device, such as one using a 12 V supply.

For more detailed technical guidance, refer to our Support page or the Mobeye knowledge base, where related topics are explained in depth.

View Mobeye devices with open collector output