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Why do Ekho devices not communicate with another translator, and how should I troubleshoot each translator?

Configure, test and troubleshoot Ekho hybrid wireless systems translator-by-translator, rather than treating all translators as one shared wireless network.

Direct answer

In an Ekho hybrid wireless system, each translator must be managed as an independent hub. Configure, troubleshoot, and report on every device and expander relative to the specific translator network it belongs to. Do not assume that devices roam between translators: a translator links to another translator only when it is explicitly set to expander mode, where its RF indicator shows the link to the central node.

Applies to

  • Products / Models: EK-WL8-TRH Hybrid Wireless Translator Module, EK-WL8-EXP Hybrid Wireless Expander Module (Ekho Hybrid Wireless systems)
  • Firmware / Version: Not applicable
  • Region: Not applicable
  • Standards: EK-WL8-TRH — EN 54-17, EN 54-18, EN 54-25; EK-WL8-EXP — EN 54-18, EN 54-25. Both are RED compliant.

Symptoms

  • A device or expander does not report to the translator you expect, or drops off after a environment change.
  • The live topology view shows a device on the translator showing a different signal value when the survey recorded it, or, at a lower dB value than expected.

Likely causes

  • The device is initialised to a different translator; devices do not roam between translator networks.
  • A translator has not been set to expander mode, so it has no RF link to the central node.
  • The device has switched to an alternative signal path within the same translator network.
  • Coverage has changed since the radio survey.

How should translators and expanders be managed in an Ekho system?

  1. Treat each translator as an independent hub.
    • Consider all devices and expanders associated with a translator as a single local system
    • Configure, test and troubleshoot devices on a per-translator basis rather than assuming cross-translator connectivity.
  2. Understand signal-to-noise relationships.
    • When assessing radio performance, evaluate signal-to-noise for devices and expanders relative to their own translator network.
    • Signal performance for one translator cluster does not directly apply to another translator cluster.
    • Within a single translator network, signal paths are dynamic. Devices and expanders choose automatically between a direct path to the translator and a path via an expander, so the live topology view can show a device on the translator when the survey expected it on the expander, and can show a lower dB value than the survey recorded. This is normal and temporary. Judge the device on its average rating score across the available paths, not on a single live reading. Multiple expanders on one translator provide a mesh solution within that translator network.

How do you configure and investigate translators and expanders?

  1. Work translator-by-translator.
    • Open the configuration or status page for a single translator.
    • Review every device and expander associated with that translator.
    • Resolve issues for that translator cluster before moving to the next translator.
  2. Repeat for each translator.
    • Move to the next translator and perform the same review and remediation steps.
    • For systems with multiple translators per loop, treat each translator as a separate hub for investigation and reporting.
  3. Produce a clear report for each translator cluster.
    • Document the state of devices and expanders for each translator separately.
    • Record any poor signal-to-noise readings or unstable communication paths.
    • Use the per-translator findings to explain required remedial work, especially where building changes have affected coverage.

Practical notes for configuration and planning

  • Plan each translator cluster within its published limits: up to 126 expanders and child devices per translator, and up to 10 translators per loop, subject to loop power, address capacity and control panel capacity.
  • Keep at least 2 m between any two wireless devices, including translator-to-translator and translator-to-expander, and mount translators and expanders 2–2.5 m above floor level.
  • Remember that an EK-WL8-EXP needs an external 12 V or 24 V DC supply (11–28 V DC, up to 80 mA) while the EK-WL8-TRH is loop powered, so expander positions are constrained by the availability of a monitored supply.
  • Do not size a translator to the 126-device maximum on its own: keep the translator-to-device ratio and design redundancy under review so that system integrity is maintained.
  • If the site layout has changed, review whether additional devices, repositioning or further radio survey work is required.

Troubleshooting tips

  • If a device or expander shows poor radio performance, verify its signal-to-noise relative to the translator network it is associated with.
  • Do not assume a device can reach an alternative translator. Troubleshoot against the configured translator first.
  • Work methodically: complete investigation and fixes for one translator before moving to the next.
  • Before treating a changed signal path as a fault, check whether the device simply switched to an alternative path within the same translator network.

When to contact technical support

Contact Hochiki technical support if a device cannot achieve an acceptable average rating score on any path within its translator network after repositioning, if adding an expander does not resolve coverage after a building change, or if a translator repeatedly loses its RF link to the central node while in expander mode. Ekho design, installation and commissioning require formal Ekho training; contact your Regional Sales Manager if the site team is not trained.

Conclusion

Manage and configure Ekho translators and expanders by treating each translator as an independent hub for investigation and reporting. Review, configure and report on devices and expanders per translator; assess signal-to-noise against the relevant translator network; and repeat this process for every translator in the system to produce clear, actionable findings.

 

Safety note

This article is general guidance for Hochiki Europe products. Design, installation, commissioning, maintenance and modification of fire detection and alarm systems should be carried out by, or under the responsibility of, a competent person in accordance with the applicable standards (for example BS 5839-1 in the UK). Statutory requirements imposed by the relevant enforcing authority also apply. Always refer to the current product manual and data sheet for the exact model before carrying out any work.

References

Last reviewed: 2026-10-12 — Reviewed by: Hochiki Europe Technical Support