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

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 relay to energise (after a short delay) when the other contact is closed.

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

  • No. of monitored inputs: 2
  • Response time: 50ms (relay energising/de-energising)
  • Time delay: 2s (Help function)
  • Aux. supply voltage: 100 – 230V AC/DC (Order Code: 99-3401)
  • Output: 2 x SPNO 5A @ 250V (AC1)
  • Dimensions(mm): W:44 x H:85 x D:63.5
Distributors Stock Code Link
RS Componenets 1883545 Go to product

Typical applications include:

  • Twin-pump booster sets
  • Duplex compressor installations
  • Paired ventilation fans
  • Paired generator control systems

Key benefits:

  • Distributes lead duty — Alternating the output relays on successive demand calls helps distribute lead operation across 2 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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LR44/3 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
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LR44/3
VIDEO HERE
Download datasheet