Zelio Logic SR2B121FU AC Smart Relay Schneider

Zelio Logic SR2B121FU 100-240V AC Compact Smart Relay from Schneider Electric

Product Introduction

The SR2B121FU belongs to the Schneider Electric Zelio Logic range of compact smart relays. This controller offers 12 I/O points in a space-saving design. Specifically, it provides 8 digital inputs and 4 relay outputs. The inputs accept 100-240V AC signals directly, so no extra interface relay is needed. Therefore, it simplifies wiring in mains-powered control panels. Furthermore, the integrated real-time clock supports time-based control functions. Meanwhile, the LCD screen and navigation buttons simplify on-site programming. Additionally, the SR2B121FU runs on 100-240V AC and mounts on a 35mm DIN rail. As a result, it suits small machines, lighting control, and building automation.

Technical Specifications

The SR2B121FU delivers solid performance for small control systems. Its key ratings include:

• Number of I/O points: 12

• Digital inputs: 8 (100-240V AC)

• Digital outputs: 4 relay

• Relay output current: 8 A thermal current per output

• Supply voltage: 100-240V AC (85-264V, 50/60 Hz)

• Clock: Integrated real-time clock

• Display: LCD with navigation buttons

• Program memory: 240 lines ladder / 500 blocks FBD

The relay outputs handle up to 8A thermal current each. Consequently, they drive contactors, solenoids, and indicator lamps directly. Besides, the AC input design accepts signals straight from push buttons and limit switches. For instance, it works well in pump control, gate control, and ventilation systems. Moreover, communication is possible through extension modules. Therefore, the relay can join larger control networks when needed.

Mechanical and Environmental Parameters

The SR2B121FU is built for industrial environments. First, its operating temperature range spans -20 to 55 °C. Next, the mechanical life of the relay output reaches 10,000,000 cycles. In addition, the electrical life reaches 500,000 cycles under AC-12 at 230V and 1.5A. The dimensions measure 90 × 71.2 × 59.5 mm (H×W×D). Meanwhile, the weight is about 0.25 kg. The housing uses durable thermoplastic material. Furthermore, the 35mm DIN rail mount allows quick installation. As a result, maintenance and replacement stay simple.

Installation Guide

Installing the SR2B121FU takes only a few steps. First, switch off the power supply and verify zero voltage. Next, clip the relay onto a 35mm DIN rail until it clicks. Then, connect the 100-240V AC supply to the dedicated terminals. Besides, wire the inputs and outputs according to your wiring diagram. Moreover, keep signal cables away from power cables to reduce noise. Finally, power up the unit and load your program via the LCD or software. However, always follow local electrical codes during wiring. Therefore, a qualified technician should perform the final commissioning.

Packaging List

• 1 × Schneider Zelio Logic SR2B121FU Compact Smart Relay

• 1 × Product label with model and rating details

• 1 × Carton box with protective packaging

Shipping
We ship worldwide via Fedex, UPS, and DHL. Orders dispatch within 1–2 business days.

FAQ

Q1: What is the supply voltage of the SR2B121FU?
A: It runs on 100-240V AC with a range of 85 to 264V. Therefore, it suits mains-powered control panels directly.

Q2: Do the inputs accept AC signals?
A: Yes. All 8 digital inputs accept 100-240V AC signals. Hence, no extra interface relay is required.

Q3: How many outputs does this smart relay have?
A: It provides 4 relay outputs. Each output handles up to 8A thermal current for direct load control.

Q4: Does the SR2B121FU support communication?
A: Yes. It connects to Ethernet or RS485 networks through extension modules. Consequently, it fits distributed control systems.

Q5: Does this product come with a warranty or certificate?
A: The package includes the relay and label only. Please contact us for document requests.