Schneider SR2B121BD Compact Smart Relay
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Model | SR2B121BD |
| Product Series | Zelio Logic |
| Product Type | Compact Smart Relay |
| Supply Voltage | 24 V DC |
| Supply Voltage Range | 19.2–30 V DC |
| Maximum Supply Current | 100 mA without extension |
| Power Dissipation | 3 W without extension |
| Total I/O | 12 |
| Digital Inputs | 8 |
| Analog Inputs | 4, configurable from supported input channels |
| Input Type | 24 V DC digital inputs; analog inputs support specified voltage and temperature-sensor signals |
| Digital Input Counting Frequency | Up to 1 kHz |
| Outputs | 4 relay outputs |
| Relay Output Voltage | 24–250 V AC; 5–30 V DC |
| Output Current | 8 A thermal current for all four relay outputs combined |
| Display | Built-in LCD display |
| Programming Languages | Ladder Diagram (LD), Function Block Diagram (FBD) |
| Programming Capacity | Up to 240 ladder lines or 500 FBD function blocks, depending on programming mode |
| Cycle Time | 6–90 ms |
| Clock | Built-in real-time clock |
| Program Backup | Built-in memory backup, up to 10 years at 25°C |
| Reverse Polarity Protection | Yes |
| Mounting | 35 mm DIN rail or screw fixing |
| Operating Temperature | -20°C to +55°C |
| Dimensions | 107.6 × 71.2 × 59.5 mm |
| Weight | 0.25 kg |
FAQ
Q1: What is the main function of the Schneider SR2B121BD smart relay?
A1: The SR2B121BD is a compact programmable relay designed for small-scale automation tasks. It processes input signals according to a user-defined program and controls connected equipment through its relay outputs. Typical applications include pump control, lighting, ventilation, and basic machine sequencing.
Q2: What power supply does the SR2B121BD require?
A2: This model requires a 24 V DC supply, with an allowable operating range of 19.2–30 V DC. The supply polarity and wiring must follow the terminal diagram. Applying an incompatible voltage may cause malfunction or damage.
Q3: Can the relay accept analog signals from sensors?
A3: Yes. The SR2B121BD supports four analog input channels through designated input terminals. Depending on the input configuration, supported signals include voltage signals and specified temperature sensors. Confirm the sensor type, signal range, and terminal assignment before connecting a device.
Q4: Which programming methods are supported?
A4: The relay supports Ladder Diagram (LD) and Function Block Diagram (FBD) programming using Schneider Electric Zelio Soft software. The appropriate method depends on the control logic and application requirements. The program should be tested before being deployed on operating equipment.
Q5: What should I check if the smart relay does not start?
A5: Check the 24 V DC supply, polarity, terminal connections, and supply voltage under load. Inspect for loose wiring or short circuits, and check the display for error indications. If the power supply is correct but the relay remains unresponsive, follow the manufacturer’s troubleshooting procedure.
Q6: What are the common causes of relay output failure?
A6: Output problems can result from excessive load current, unsuitable load voltage, worn contacts, wiring errors, or an incorrect program. Check the output ratings and load requirements, and use suitable suppression components for inductive loads where required. Replace the unit if its output contacts are confirmed to be defective.
Q7: Can the SR2B121BD retain its program after a power interruption?
A7: Yes. The unit has built-in program memory backup designed to retain data for up to 10 years at 25°C under specified conditions. After power is restored, verify the clock settings, program status, and correct operation of the controlled equipment.
Q8: What should be considered when replacing an existing smart relay with the SR2B121BD?
A8: Verify the supply voltage, input types, output contact ratings, terminal assignments, programming requirements, and available installation space. Also confirm that the existing program is compatible or can be converted and tested. Perform functional checks before reconnecting the controlled equipment to normal operation.
Schneider SR2B121BD Compact Smart Relay is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Company Introduction
Xiamen Shengruite Trading Co., Ltd. is a company specializing in the supply of industrial PLC spare parts.
We provide high-quality PLC spare parts to customers in the global manufacturing, energy and power, chemical and other fields.
Since its establishment in 2011, after 13 years of rapid development, the cumulative global shipments have reached 223,650 pieces, with an annual output value of US$50 million.
Successfully served more than 500 customers in more than 100 countries and regions including Saudi Arabia, UAE, the United States, Europe, Africa, and Southeast Asia
Our Mission
Provide customers with the best quality PLC spare parts and the fastest delivery service to ensure that their industrial automation systems are always in the best operating condition.
We provide a 1-year warranty service, and we support returns and exchanges for any issues to ensure your rights and interests are fully protected.
We can provide detailed product images upon request, and our team can arrange warehouse photos for confirmation to ensure you have all the information you need before making a purchase.
Shipping times vary depending on your location. With the support of our 16 global warehouses, we strive to deliver orders as quickly as possible. Contact us to get an estimated delivery time for your specific location.
The minimum order quantity (MOQ) is typically one unit. However, for larger orders, please contact us for potential discounts and pricing details.
Yes, we offer competitive pricing for bulk purchases. Please reach out to our sales team with the specifics of your order to receive a custom quote.
We accept various payment methods for wholesale orders, including bank transfers (T/T), letters of credit, and other options upon agreement. For large transactions, please contact us directly for payment terms.
Yes, we offer flexible ordering options for both small and large quantities. Whether youre looking for a single unit or a large batch, we can accommodate your needs.
We occasionally offer promotional discounts for new wholesale customers. Contact us to learn more about any current offers available for first-time buyers.
If you are unsure of compatibility with your existing setup please provide your system details and our support team can verify compatibility prior to purchase.
Returns are accepted within 30 days if the product is unused, unopened, and in its original packaging. Please note that return shipping and associated costs are the buyer\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’s responsibility.
Yes, we offer technical support for the installation and integration of our products. Our team can assist with setup, configuration, and troubleshooting to ensure a smooth installation.
