⚡ Harmony XPS Universal

The Harmony XPS Universal series is Schneider Electric’s flagship family of safety relays, representing the Monitor stage of the machine‑safety chain.
They are simple, reliable, hardwired safety modules designed for small‑to‑medium machines, sitting below the software‑configured Preventa XPS MCM in complexity.

Their core purpose: monitor safety devices, detect faults, and enable safe machine operation.

🛠️ The Core Innovation — “Universal” Simplicity

Traditional safety relays were single‑function, forcing engineers to buy a different relay for every sensor type.
XPS Universal fixes this with multi‑function capability and smart diagnostics.

• Selectable functions
  A rotary dial lets you switch the module’s role (E‑Stop, light curtain, interlock, etc.) without rewiring.
• Smart side‑bus diagnostics
  Sends detailed status (channel faults, open circuits, reset conditions) to a standard PLC using one wire.
  No fieldbus module, no wiring explosion.
• Drop‑in replacement
  One module covers multiple applications, reducing stock and simplifying panel design.

📋 Key Modules in the XPS Universal Range

• XPSUAB / XPSUAF —
  Cost‑effective monitoring of E‑Stops and mechanical safety switches.
• XPSUAK —
  The multi‑function workhorse: handles E‑Stops, interlocks, OSSD light curtains, and magnetic sensors.
• XPSUS —
  For safety mats, safety edges, and two‑hand control applications.
• XPSUAT —
  Provides time‑delayed safety outputs for machines requiring a controlled stop before guard unlocking.

⚙️ Essential Technical Specs

• Safety level:
  Certified up to PL e / Category 4(ISO 13849‑1) and SIL 3(IEC 62061).
• Form factor:
  Slim 22.5 mm or 45 mm DIN‑rail housings.
• Terminal options:
  Removable screw terminals or push‑in spring terminals for fast, vibration‑proof wiring.

⭐ One‑line summary

Harmony XPS Universal relays are multi‑function, diagnostics‑ready safety modules that simplify wiring, reduce part numbers, and reliably monitor safety devices on small‑to‑medium machines.