LR44/3 Logic Relay, 3 x SPNO, DIN Rail Mount

  • Logic Relay designed to balance wear between motors, compressors and generators
  • Monitors 3 external N.O. contacts
  • Isolated Auxiliary supply
  • 3 x SPNO Relay outputs
  • 44mm wide, DIN Rail mount

The product is designed to monitor the status of the externally wired contacts and operate/alternate the output relays in turn on each closure of the contact. A “help” function is included such that it allows the second and third relay to energise when the other contacts are closed.

An auxiliary supply (required to power the unit) must be present for the product to function.

  • No. of monitored inputs: 3
  • Response time: 50ms (relay energising/de-energising)
  • Aux. supply voltage: 100 – 230V AC/DC(Order Code: 99-3402)
  • Output: 3 x SPNO 5A @ 250V (AC1)
  • Dimensions(mm): W:44 x H:85 x D:63.5
Distributors Stock Code Link
RS Components 1883544 Go to product

Typical applications include:

  • Three-pump booster stations
  • Multi-compressor refrigeration plant
  • Multi-fan ventilation plant
  • Generator sequencing panels

Key benefits:

  • Distributes lead duty — Alternating the output relays on successive demand calls helps distribute lead operation across 3 connected units.
  • Adds capacity when demand rises — The Help function energises additional outputs when the other demand contacts close, allowing external equipment to run together.
  • Simplifies sequencing control — A dedicated DIN-rail logic relay combines demand-contact monitoring and output alternation in one module.
  • Makes output status visible — Individual relay LEDs show which outputs are energised, helping commissioning and basic operational checks.

Alternative product:

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LR44/2 Logic Relay, 2 x SPNO, DIN Rail Mount
  • Logic Relay designed to balance wear between motors, compressors and generators
  • Monitors 2 external N.O. contacts
  • Built in “Help” function
  • Isolated Auxiliary supply
  • 2 x SPNO Relay outputs
  • 44mm wide, DIN Rail mount
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LR44/2
VIDEO HERE
Download datasheet