XL-100CU HONEYWELL

HONEYWELL XL-100CU Relay Input Module

Brand：HONEYWELL Model number：XL-100CU

Country of origin: United States Product weight：0.4kg

HS code：8517623990

Product Details：

Product Dimensions：

A Honeywell Relay Input Module is an electronic component that serves as a protective and signal-conditioning interface. It receives discrete (on/off) signals from external devices like switches, pushbuttons, and limit switches. The module uses a built-in relay to provide a clean, isolated contact closure to the control system, protecting the sensitive electronic components of the controller from voltage surges, electrical noise, or ground faults originating in the field.

Functionality: When a field device activates, it energizes the relay coil inside the module. The relay's contacts then close, sending a low-voltage, isolated signal to the control system's processor. This mechanism ensures that the control system's logic sees a simple, reliable on/off signal without being exposed to the potentially harsh electrical environment of the field wiring.
Types: These modules are typically categorized by the voltage of the input signal they are designed to handle, such as 24V AC/DC, 120V AC, or 240V AC. They are also classified by the number of input channels (e.g., 8, 16, or 32 points per module).
Key Features:

Galvanic Isolation: The primary advantage of a relay input module is the physical separation between the input signal's circuit and the controller's internal circuitry. This isolation provides excellent protection.
LED Indicators: Each input channel typically has an LED to visually confirm when a signal is active, making troubleshooting easier.
Robustness: Designed for reliable operation in industrial environments, with features that resist electrical noise and voltage fluctuations.
Modular Design: These modules are often part of a larger, modular I/O system, allowing for easy expansion and hot-swapping.
High-Voltage Capability: Specifically designed to handle higher voltages (e.g., 120V AC) that may damage non-isolated digital input modules.

Product Parameters

Specific parameters vary by model and product series, but common parameters include:

Input Voltage: The nominal voltage of the input signal (e.g., 24V DC, 120V AC).
Input Current: The minimum current required to reliably energize the relay coil.
Number of Channels: The number of independent input points per module.
Isolation Voltage: The maximum voltage the module can withstand between its input and output circuits, typically rated in thousands of volts.
Operating Temperature: The range of temperatures the module can operate within (e.g., 0°C to 60°C).
Response Time: The time it takes for the relay contacts to close after the input signal is applied. This is generally slower than solid-state input modules.
Mounting: Typically designed to be mounted in a specific I/O rack or on a DIN rail.
Certifications: Adherence to international safety and quality standards such as UL, CE, and others.

Product Advantages

Superior Electrical Isolation: This is the most significant advantage. It protects the PLC or DCS from high voltages, ground loops, and electrical noise, leading to improved system reliability and longevity.
High Voltage Compatibility: They can safely accept input signals at standard line voltages (e.g., 120V AC) without requiring external signal converters.
Simplified Troubleshooting: The physical relay provides a clear on/off state, and the LED indicators offer quick visual confirmation of input status, reducing diagnostic time.
Rugged and Durable: Relays are mechanical devices that are less sensitive to transients and surges compared to solid-state electronics, making the modules very robust.
Standardized Interface: They present a consistent, low-voltage signal to the controller, regardless of the field device's voltage level.

Important Considerations

Slower Response Time: Because they are electromechanical, relay input modules have a slower response time (a few milliseconds) than solid-state input modules. This makes them unsuitable for applications that require very high-speed counting or rapid event detection.
Limited Life Cycle: Mechanical relays have a finite number of switching cycles before they wear out. While this is typically in the millions, it is a factor to consider in applications with very high switching frequency.
Higher Power Consumption: The relay coil requires a continuous current to stay energized, which can lead to slightly higher power consumption compared to solid-state alternatives.
Sourcing: As product lines evolve, ensure the specific module you need is still actively manufactured or that there is a suitable replacement available.

Product Applications

Honeywell Relay Input Modules are widely used in industrial and commercial applications where safety, electrical isolation, and high-voltage compatibility are required:

HVAC and Building Automation: Monitoring the status of fans, pumps, and dampers, as well as fire alarm systems and safety interlocks.
Manufacturing and Process Control: Monitoring the open/closed status of valves, the position of limit switches on machinery, or the state of pushbuttons and selector switches on control panels.
Power Generation and Utilities: Monitoring the status of circuit breakers, switches, and other control equipment in power substations.
Water and Wastewater Treatment: Receiving signals from pump status alarms or tank level switches.
General Industrial Control: Any application where the field devices are powered by standard line voltages and require a robust, isolated interface to a control system.

XL-100CU HONEYWELL

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