SR2B121FU 1PCS Schneider SR2B121FU Logic Relay Fast delivery #u

What Is the Schneider SR2B121FU Zelio Logic Smart Relay?

The Schneider SR2B121FU is a compact smart relay from the Zelio Logic SR2/SR3 family — a 12 I/O logic controller with 8 discrete inputs and 4 relay outputs, powered by 100–240 V AC, and equipped with an integrated display and a real-time clock. It is the mains-voltage (F) version of the Zelio 12 I/O base unit and is programmed with simple ladder logic from the front panel or with Zelio Soft software.

In short: a genuine Schneider Electric Zelio Logic smart relay, model SR2B121FU, with 12 I/O (8 discrete inputs + 4 relay outputs), 100–240 V AC supply, built-in display, real-time clock and EEPROM memory backup up to 10 years. KOEED supplies this unit new, with photo/video confirmation before dispatch and worldwide shipping.

Positioned between a classic relay-and-timer panel and a full PLC, the SR2B121FU is a drop-in control core for pumps, fans, small machines, conveyor interlocking and building automation logic. It ships as a discovery package that includes the Zelio Soft programming software, which makes it one of the fastest smart relays on the market to commission.

Key Features

1. Genuine Schneider Electric Zelio Logic Hardware

Feature: Factory-produced Zelio Logic smart relay bearing the official Schneider Electric model code SR2B121FU.
Benefit: Guaranteed compatibility with Zelio accessories, expansion modules and the Schneider ecosystem — no clone or grey-market risk in critical controls.
Result: Reliable, documented operation over the full service life of your panel or machine.

2. 12 I/O in One Compact Base Unit

Feature: 12 integrated I/O points — 8 discrete inputs and 4 relay outputs — in a single DIN-rail-mountable housing.
Benefit: Replaces clusters of individual timers, counters and interposing relays with one programmable unit.
Result: Smaller control panels, less wiring, and faster troubleshooting for maintenance teams.

3. Simple Ladder Programming With Zelio Soft

Feature: Simple ladder programming adapted for non-specialists, delivered with the Zelio Soft programming software in the discovery package.
Benefit: Electricians and plant technicians can build and modify logic without a dedicated PLC engineering team.
Result: Faster commissioning and lower engineering cost on small automation projects.

4. Integrated Display, Real-Time Clock and 10-Year Memory Backup

Feature: Built-in display and real-time clock, with built-in EEPROM flash memory that retains the program for up to 10 years.
Benefit: Local status readouts and time-based scheduling without extra hardware; the program survives power loss or incidents.
Result: Easy recovery after outages and dependable time-driven control for lighting, HVAC and cycling applications.

5. KOEED Verification and Global Logistics

Feature: KOEED sends photos and videos of the actual unit within 3 days of ordering, then ships worldwide via DHL, UPS, FedEx or TNT.
Benefit: You confirm the exact part and condition before it leaves the warehouse, with delivery typically in 7–14 days.
Result: No "wrong part arrived" surprises and minimal unplanned downtime for facilities outside Europe.

Key Specifications

Typical Applications

• Small machine automation — packaging, labeling and filling lines that need timer, counter and sequencing logic
• Pump, fan and compressor control panels with duty cycling and run-time schedules
• HVAC and building services control — lighting schedules, ventilation interlocks and access logic
• Conveyor interlocking and material handling logic in distribution and assembly areas
• OEM panel builds for food & beverage, packaging and light manufacturing equipment
• Retrofit or upgrade of relay-and-timer panels on existing machines — same footprint, programmable logic
• Spare parts stock for maintenance depots supporting Schneider Electric Zelio-based lines

Frequently Asked Questions

Is the Schneider SR2B121FU a PLC or a relay?

It is a Zelio Logic smart relay — a compact programmable logic controller that sits between discrete relays and full PLCs. You program it with simple ladder logic via the front panel or Zelio Soft software, which makes it accessible to electricians as well as control engineers.

What is the supply voltage of SR2B121FU?

The SR2B121FU is the mains-voltage version of the Zelio 12 I/O base unit and runs on 100–240 V AC. If your panel is 24 V DC instead, check the Zelio 24 V DC models such as SR2B121BD — contact KOEED and we will confirm the right variant for your supply.

How many inputs and outputs does the SR2B121FU have?

It provides 12 I/O in total: 8 discrete inputs and 4 relay outputs, all integrated in one compact base unit. Exact input/output electrical ratings should be verified from the product label or the Schneider datasheet before wiring.

Does the SR2B121FU include a display and a real-time clock?

Yes. The SR2B121FU comes with an integrated display and a real-time clock, and its built-in EEPROM flash memory keeps the program backed up for up to 10 years. That makes it well suited for time-based control and quick on-site diagnostics.

Do you ship this smart relay internationally?

Yes. KOEED ships worldwide via DHL, UPS, TNT, FedEx and EMS, with delivery to most destinations in 7–14 days. You will receive photo/video verification of your actual unit before dispatch and a tracking number within 24 hours of shipment.

What is your return policy for this part?

KOEED accepts returns within 30 days of delivery if the unit is unused and in its original packaging. Contact Moritta@KOEED.com to start the return process; approved refunds are issued within 10 business days.

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