RAC18-IP - Ethernet - Limitations on daisy-chaining RAC18-IP devices

Introduction

This guide provides insights into the factors that affect the maximum number of RAC18-IP devices that can be daisy-chained using the 2 available Ethernet ports.

Good Practice

• While there is no specific limitation on the number of RAC18-IP devices that can be daisy chained, Ethernet network specifications must be considered.

• The RAC18-IP device features a fail-safe functionality, which ensures that the switch continues to work in case of a power supply failure. However, this impacts the maximum cable length between connected devices.

• The general rule for Ethernet networks is that the maximum length between connected devices should not exceed:
  - 50 meters when using crossover Ethernet cable,
  - 100 meters when using standard straight-through Ethernet cable.

• When using devices with fail-safe protection in Ethernet switches, the maximum length between connected devices is proportionally shorter.

• For example, if there are four devices in the network and the two middle ones lose power, the length of the cable between each device should not exceed 25 meters. This ensures that the overall cable length between the end devices remains within the 100-meter limit, fulfilling Ethernet network requirements.

By understanding these factors, you can effectively plan your daisy chain of RAC18-IP devices, ensuring optimal network performance and reliability.