Schneider RE9RA31MW7 | Industrial timing relay, Harmony Time, off delay 0.3…30 s, 240 V AC, solid state

Technical Specifications of Schneider RE9RA31MW7

• Brand: Schneider Electric
• Model: RE9RA31MW7
• Type: Off-delay industrial timing relay
• Delay Time Range: 0.3 to 30 seconds
• Supply Voltage: 240 V AC
• Relay Output Type: Solid-state output
• Mounting Type: DIN rail
• Contact Configuration: 1C/O (1 Changeover Contact)
• Power Consumption: 4 VA
• Operating Temperature Range: -20°C to +55°C
• Protection Rating: IP20
• Frequency Range: 50/60 Hz
• Dimensions: 22.5 mm (width)

Key Features

1. Accurate Off-Delay Timing
   • The RE9RA31MW7 relay features off-delay timing, with an adjustable delay range of 0.3 to 30 seconds. This allows precise control over the delay in shutting down equipment or systems after the input signal is removed. It’s perfect for applications requiring a controlled, delayed deactivation.
2. Solid-State Output
   • The solid-state output provides reliable and durable performance without mechanical wear. It offers faster switching times and is more resistant to vibrations and environmental factors, making it ideal for industrial environments where reliability and longevity are essential.
3. Wide Supply Voltage Range
   • The 240 V AC supply voltage makes this relay compatible with standard industrial power systems. Its broad voltage compatibility ensures that it can be easily integrated into a wide range of applications.
4. Compact and Space-Efficient Design
   • With a compact 22.5 mm width, the relay is designed for DIN rail mounting, allowing easy installation in control panels and electrical cabinets where space is at a premium.
5. 1 Changeover Contact (1C/O)
   • The 1C/O configuration features a changeover contact, allowing the relay to switch between different output states based on the timing. This configuration is useful for a variety of control and automation tasks.
6. Wide Operating Temperature Range
   • The relay operates within a temperature range of -20°C to +55°C, making it suitable for both indoor and outdoor environments, including harsh industrial conditions where temperature fluctuations may occur.
7. Energy Efficient
   • With a low power consumption of 4 VA, the RE9RA31MW7 is energy-efficient, helping reduce the overall power demand of the control system.
8. Easy Integration into Control Systems
   • The DIN rail mounting feature makes it simple to incorporate the relay into existing control systems, allowing for a hassle-free integration into industrial control panels and electrical circuits.

Applications

1. Industrial Automation Systems
   • The RE9RA31MW7 is ideal for industrial automation systems that require a delay in deactivating machinery, pumps, conveyors, or other equipment. For instance, it can be used to keep equipment running for a brief period after the system input is switched off, preventing abrupt stops and ensuring smooth system operation.
2. HVAC Control Systems
   • In HVAC systems, the relay can manage the off-delay of fans or compressors, ensuring they continue running for a brief period after a system shutdown. This helps maintain proper air circulation and prevents thermal shock to equipment.
3. Lighting Control
   • The relay is suitable for lighting control systems, especially for sequential or timed shutdowns, where lights or equipment need to remain on for a short time after the control signal is turned off. It ensures seamless operations in automated lighting systems.
4. Motor Control Systems
   • The relay is effective in controlling motorized systems by ensuring the motor continues to run for a set delay period after the signal to stop is received. This avoids abrupt motor stops and helps in cooling down equipment, preventing potential damage.
5. Pump and Compressor Protection
   • It can be used in pump and compressor control circuits where a delay is required to ensure smooth shut down processes. The off-delay relay can prevent damage caused by immediate shutdowns and provide a graceful stop to protect the components.
6. Alarm Systems
   • In alarm systems, the relay can be employed to delay the disconnection of the system, providing a buffer time for safe shutdown or manual intervention, ensuring no abrupt cut-offs that might disrupt safety processes.
7. Timing Control in Manufacturing Processes
   • The off-delay feature is crucial in manufacturing processes that require a delay before shutting down equipment after a certain operation. It can help synchronize processes in automated production lines.