Brand:Schneider PLC Item No.:SR2B201B Product Origin:France Product Dimensions:124.6 x 107.6 x 59.5 mm Product Weight:0.38 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
Product Introduction and Industrial Application Value
The Schneider SR2B201B Compact Intelligent Relay is a reliable programmable control device designed for users who need advanced logic control in a compact format. As part of the Zelio Logic series, it combines smart relay simplicity with practical automation functionality, providing an effective solution for small and medium control applications.
The SR2B201B integrates essential automation features including programmable logic, relay outputs, local display, clock management, and memory protection. These functions allow engineers to create efficient control systems while reducing wiring complexity and installation costs.
For industrial automation professionals, the SR2B201B offers a balanced combination of flexibility, reliability, and ease of use, making it a valuable component for modern compact control solutions.
Technical Specifications of Schneider SR2B201B Compact Intelligent Relay
Specification
Details
Product Type
Compact Intelligent Relay
Model Number
SR2B201B
Product Family
Zelio Logic
Supply Voltage
24 V AC
Supply Voltage Range
20.4–28.8 V AC
Supply Frequency
50/60 Hz
Total I/O Points
20
Digital Inputs
12
Relay Outputs
8
Local Display
Integrated LCD Display
Clock Function
Yes
Programming Method
Ladder Logic / Function Block Diagram
Ladder Program Capacity
Up to 240 Lines
FBD Program Capacity
Up to 500 Function Blocks
Cycle Time
6–90 ms
Program Memory
EEPROM
Backup Retention
10 Years at 25°C
Mounting Type
DIN Rail Mount
Application Type
Industrial Automation Control
Dimensions
124.6 × 107.6 × 59.5 mm
Weight
0.38 kg (0.84 lb)
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Automation Applications and Intelligent Control Solutions
The Schneider SR2B201B Compact Intelligent Relay is a programmable smart relay designed for compact automation systems that require dependable logic control, flexible programming capability, and simplified electrical architecture. As part of the Zelio Logic family, the SR2B201B provides an efficient alternative to traditional relay-based control systems and is widely used in machine automation, building control, lighting systems, HVAC applications, pump management, and small industrial equipment.
With 20 integrated I/O points, a built-in display, clock function, and relay outputs, the SR2B201B enables engineers to create customized automation sequences without installing a full PLC system. Its compact design helps reduce cabinet complexity while maintaining reliable control performance for various industrial and commercial applications.
The SR2B201B is particularly suitable for OEM manufacturers, machine builders, and system integrators who need a practical control solution with easy programming, stable operation, and long-term reliability.
Key Product Advantages and Industrial Performance
Compact Smart Relay Architecture
The SR2B201B integrates logic processing, digital input monitoring, relay output control, timing functions, and display capability into one compact controller. This integrated structure simplifies control panel design and reduces the need for multiple external components.
Flexible Programming for Efficient Automation Development
Supporting ladder logic and function block diagram programming, the SR2B201B allows engineers to develop customized automation sequences according to different application requirements. The programming flexibility helps reduce commissioning time and simplifies future system modifications.
Expanded 20 I/O Control Capability
Compared with smaller smart relays, the SR2B201B provides a larger number of input and output points, including 12 discrete inputs and 8 relay outputs. This makes it suitable for applications requiring multiple sensors, actuators, and control devices.
Reliable Relay Output Performance
The integrated relay outputs support a wide range of industrial switching tasks, including contactor control, valve operation, alarm systems, and equipment status indication. The durable relay structure provides dependable performance for repetitive automation operations.
Built-In Display and Clock Function
The integrated display allows operators to monitor operating status and configure functions directly from the device. The clock feature supports scheduled automation tasks such as lighting management, energy control, and timed equipment operation.
Secure Program Storage and Easy Recovery
The SR2B201B includes EEPROM memory technology that preserves user programs and configuration data. This ensures reliable program recovery after power interruptions and improves overall system availability.
Space-Saving DIN Rail Installation
The compact housing design allows convenient DIN rail mounting inside electrical cabinets, helping engineers optimize installation space while maintaining professional industrial standards.
Technical FAQs About Schneider SR2B201B Compact Intelligent Relay
Q1: What applications are suitable for the Schneider SR2B201B?
A: The SR2B201B is suitable for compact automation applications including machine control, HVAC systems, pump control, lighting automation, and industrial sequencing systems.
Q2: What power supply does the SR2B201B require?
A: The SR2B201B requires a 24 V AC power supply and is designed for industrial control applications requiring stable AC operation.
Q3: How many inputs and outputs are available on the SR2B201B?
A: The relay provides 20 I/O points, including 12 discrete inputs and 8 relay outputs for automation control.
Q4: Which programming methods are supported by this smart relay?
A: The SR2B201B supports ladder programming and function block diagram programming, allowing engineers to create flexible control logic.
Q5: Can the SR2B201B replace traditional relay circuits?
A: Yes. It can replace complex relay logic systems by integrating timers, counters, logic operations, and sequential control functions into one programmable unit.
Q6: How does the SR2B201B retain user programs after power loss?
A: The relay uses EEPROM memory to maintain user programs and settings, allowing reliable restoration after power interruptions.
Q7: What should be checked when relay outputs fail to operate?
A: Technicians should inspect output wiring, connected loads, input conditions, program logic, and relay status during troubleshooting.
Q8: Can the SR2B201B be expanded for larger automation systems?
A: Yes. The Zelio Logic platform supports compatible expansion accessories to increase system capability when required.
Q9: How can incorrect control sequences be diagnosed?
A: Engineers should review ladder logic, function blocks, timer settings, counter values, and real-time input/output status.
Q10: What maintenance practices improve SR2B201B reliability?
A: Regular inspection of wiring connections, cabinet conditions, program backups, and operating parameters helps maintain stable performance.
