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Schneider Electric SR2B121FU logic relay with LCD display

Schneider Electric

Schneider Electric SR2B121FU Logic Relay 100-240V AC

SKU CH-9SMS-SXM25

Controls up to four relay outputs with eight inputs, sixteen counters, sixteen timers and a built-in clock on an LCD display

  • Wide 100-240 V AC input range suits global installations
  • Eight inputs and four relay outputs handle diverse automation tasks
  • Sixteen timers and sixteen counters enable complex sequencing
  • Compact 2.8 x 4.24 x 2.34 in footprint fits tight panels

Schneider Electric SR2B121FU Logic Relay

This logic relay operates on a 100 to 240V AC supply and provides eight inputs with four relay outputs rated at 8.0 A. It includes sixteen counters, sixteen timers, a built-in clock and an LCD display for local status. The unit suits automation tasks that require programmable logic in a compact DIN-rail format.

Straightforward DIN-rail mounting

Wiring the eight inputs and four outputs is simple with standard ferrules, and the LCD menu guides timer and counter setup without a PC. The 2.34 in depth fits shallow enclosures, but the 4.24 in height and 2.8 in width need panel space. Buyers who need more than four outputs or analogue I/O should check larger programmable controllers.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $205.99
Pricier than about 88% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameSchneider Electric
Model nameSR2B121FU

Questions about this item

How can I confirm the Schneider Electric SR2B121FU logic relay is operating correctly after installation?

Power the unit with 100 to 240V AC and check that the LCD display shows the clock and allows access to the 16 counters and 16 timers. Verify the 8 inputs and 4 relay outputs change state as programmed, with each output switching up to 8.0 A.

What is included with the SR2B121FU and what must be purchased separately?

The box contains the logic relay module itself, measuring 2.8 in wide, 4.24 in high and 2.34 in deep. Wiring, mounting hardware, programming cables and any external sensors or actuators for the 8 inputs and 4 outputs are not included and must be sourced separately.

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