Wiring and Addressing Apollo Devices on Morley Panels

Most Morley installs in the field run Apollo XP95 or Discovery devices on the loop, with conventional sounders driven from sounder-circuit outputs. This section covers the wiring and addressing rules for that combination — the bit where, in practice, most install errors and most field faults come from.

Loop wiring fundamentals

The lessons explain loop polarity, the role of line isolators, maximum spur length and device count, the cable specification (typically Firetuf or equivalent enhanced-grade fire-resistant cable), and why a closed loop with isolators is the architectural choice over a star or tree topology on anything beyond very small sites. Every wiring rule comes with the BS 5839 / I.S. 3218 reference where applicable.

Addressing Apollo devices

Addresses are set on Apollo devices via the address-setting tool (the XP95-tool / Soteria-tool family). The lessons cover how to use it, how to verify the address back at the panel, and the workflow for re-addressing devices on a project that has been re-zoned mid-build. Common mistakes — address conflicts, devices that read “unconfigured”, devices that come up at address 0 or 255 — are walked through with the diagnostic.

Conventional sounders alongside

Many Morley installs have addressable detection but conventional sounder circuits driven from the panel’s sounder outputs (cost-driven, especially on retrofits). The lessons cover end-of-line resistor selection, polarity, and how the sounder circuits are configured in panel software. The full hands-on version of this material, with bench-rigged loop demonstrations, is in Morley with Apollo devices training on bhcourses.com.