Relé Inteligente Compacto Schneider SR2A201FU

Complete Technical Guide for Schneider SR2A201FU Compact Smart Relay

The Schneider SR2A201FU is a compact smart relay belonging to the Zelio Logic series. It integrates basic PLC functions with the advantages of relay control, and is suitable for logic control, remote management and monitoring of simple automation systems. The following is the complete technical parameters, recursos funcionais, application scenarios and model selection & replacement solutions.

Core Product Overview

Item	Parâmetro
Tipo de produto	Compact Smart Relay
Série	Zelio Logic SR2
Configuração de E/S	12 discrete inputs + 8 saídas de relé (20 I/O points in total)
Tensão da fonte de alimentação	100~240V AC, 50/60Hz
Função de exibição	Equipped with LCD screen and navigation buttons
Clock Function	No built-in real-time clock
Método de montagem	35mm montagem em trilho DIN padrão
Classe de Proteção	IP20 (painel frontal), IP40 (overall)
Temperatura operacional	-20℃ ~ +55℃
Temperatura de armazenamento	-40℃ ~ +70 ℃
Período de garantia	18 meses

Parâmetros Técnicos Detalhados

(EU) Características de entrada

Parâmetro	Especificação
Number of Input Points	12 discrete input points
Tipo de entrada	CC 24V (padrão), compatible with NPN/PNP signals
Corrente de entrada	Approximately 7mA per point
Tempo de resposta	≤10ms
Método de isolamento	Photoelectric isolation, 2500V e

(II) Características de saída

Parâmetro	Especificação
Number of Output Points	8 relay output points
Tipo de contato	Normalmente aberto (NÃO), C-type contacts (opcional)
Corrente nominal	Maximum 8A per point, for AC-1 category loads
Tensão nominal	Maximum 250V AC / 30Em DC
Vida útil mecânica	≥10 milhões de operações
Vida útil elétrica	≥100.000 operações (na carga nominal)
Proteção contra surtos	Built-in RC snubber circuit

(III) Funções de controle

Função	Especificação
Método de programação	Diagrama de escada, supports 0~240 logic lines
Built-in Function Blocks	16 timers, 16 contadores, shift registers, comparators, etc..
Memória	Built-in EEPROM flash memory, data retention up to 10 anos
Interface de comunicação	Supports USB/Bluetooth communication expansion via SR2USB01 or SR2BTC01 module
Program Capacity	Can store multiple programs, supports program copying to other SR2 relays

III. Principais recursos funcionais

Projeto Integrado: Integrates PLC logic control and relay output, meeting small-to-medium-sized control requirements without additional expansion modules.
Easy Programming: Supports ladder diagram programming. On-site editing, monitoring and fault diagnosis can be performed via the built-in LCD screen and navigation buttons, eliminating the need for a dedicated programmer.
Flexible Adaptability: Wide voltage power supply (100~240V AC) is compatible with power grids worldwide, and DC 24V input is compatible with industrial sensor signals.
Reliable and Durable: Industrial-grade design with strong anti-electromagnetic interference capability, adequado para ambientes industriais agressivos.
Data Security: Built-in EEPROM memory ensures no program or data loss after power failure, with a backup cycle of up to 10 anos.
Otimização de custos: Replaces traditional relay control cabinets, reduces wiring complexity, and lowers maintenance costs and potential fault points.
Cenários típicos de aplicação
Controle Motor: Start-stop, forward-reverse rotation, star-delta reduced-voltage starting and other self-locking and interlocking control for single/three-phase motors.
Pump and Valve Systems: Logic control and protection for water supply and drainage, hydraulic and pneumatic systems.
HVAC Control: Interlocking control of temperature/pressure/flow for fans, compressors and air conditioning systems.
Lighting Management: Timed lighting, zoning control and energy-saving management for industrial plants and commercial buildings.
Equipment Interlocking: Sequence control, contando, time delay and interlocking protection for simple processes in production lines.
Monitoramento Remoto: Realize remote monitoring and control of equipment operating status through communication modules.
Programming and Commissioning Methods
On-site Programming: Directly perform logic editing, parameter setting and fault diagnosis via the built-in LCD screen and navigation buttons.
Software Programming: Use the Zelio Soft dedicated programming software (including Discovery Package learning version), which supports ladder diagram editing, simulation and program upload/download.
Expansão da Comunicação:

SR2USB01: USB communication module, enabling high-speed data transmission between PC and relay.

SR2BTC01: Bluetooth communication module, supporting wireless programming and monitoring.

Diagnóstico de falhas: The LCD screen displays real-time I/O status, timer/counter values and fault codes, facilitating quick problem location.
Seleção de modelo, Replacement and Cross-brand Alternatives

(EU) Schneider Same-series Alternatives

Modelo	Diferenças	Cenários de aplicação
SR2A101FU	No LCD screen	Cost-sensitive fixed control scenarios that do not require on-site programming
SR2A201FW	With real-time clock	Applications requiring timing control and time recording
SR2B201FU	8 entradas + 4 saídas de relé	Scenarios with fewer I/O point requirements
SR2B201FW	8 entradas + 4 saídas de relé + clock	Simple timing control scenarios

(II) Cross-brand Alternative Solutions

Marca	Modelo	Compatibilidade	Observações
Chint	NX-SR Series Smart Relays	★★★☆☆	Similar functions, I/O points need to be matched accordingly
Delicioso	CDSR Series	★★★☆☆	Compatible with basic logic control functions
Omron	CP1E Series Micro PLC	★★★★☆	More abundant functions, programming software needs to be adapted
Siemens	LOGOTIPO! Série	★★★★☆	Same type of compact smart relay with different communication protocols

VII. Pontos-chave de instalação e fiação

Local de instalação: Montagem em trilho DIN padrão de 35 mm, reserve ≥50mm heat dissipation space, and avoid high temperature, umidade, dust and strong electromagnetic interference environments.
Fiação da fonte de alimentação: Connect L/N to 100~240V AC power supply, and ensure the PE terminal is reliably grounded.
Fiação de entrada:

Conecte o terminal comum (COM) to the negative pole of DC 24V.

Connect input points to the positive pole of sensor signals, with a response time ≤10ms.

Fiação de saída:

O terminal comum (COM) of relay outputs can be connected to AC 220V or DC 24V power supply.

Maximum load of 8A per point; para cargas indutivas, a freewheeling diode (CC) or RC snubber circuit (AC) must be connected in parallel.

Fiação de comunicação: Realize USB/Bluetooth communication through expansion modules, with communication cable length ≤5m.

VIII. Solução de problemas de falhas comuns

Fenômeno de falha	Possíveis causas	Métodos de solução de problemas
Power indicator not lit	Poor power connection/abnormal voltage/damaged power module	Check power wiring and voltage, replace the power module
No input response	Abnormal input signal/wiring error/damaged input point	Measure input signal, verifique a fiação, replace the input point
No output action	Damaged output point/load short circuit/logic error	Check load and wiring, simulate and test logic with Zelio Soft
Program loss	EEPROM fault/abnormal power failure	Check power stability, re-download the program
Falha de comunicação	Poor connection of communication module/incorrect software settings	Check module connection, confirm communication parameter matching

Safety and Maintenance Suggestions
Operação Segura: Programming and wiring must be performed under power-off conditions to avoid electric shock risks.
Manutenção regular:

Inspect wiring terminals for looseness and clean dust on the equipment surface every quarter.

Test I/O point response and relay contact reliability every year.

Program Backup: Regularly back up programs via Zelio Soft software to prevent data loss.
Spare Parts Reserve: It is recommended to reserve spare relays of the same model for critical applications to shorten fault downtime.