CN15DN3AB EATON

CN15DN3AB  EATON Relay Input Module

Product  Description：

The EATON Relay Input Module is a specialized I/O (Input/Output) expansion unit designed to accept signals from external devices, such as limit switches, proximity sensors, pushbuttons, or other relay contacts, and convert those physical signals into digital logic signals readable by the Central Unit (CPU) of the control system. The key characteristic of this module is its ability to handle higher input voltages or AC power signals that are commonly found in industrial environments, unlike standard DC input modules. Each input channel is electrically isolated, typically using optocouplers or similar technology, protecting the sensitive internal electronics of the main controller from voltage spikes and electrical noise originating from the field wiring. These modules are generally housed in a robust, compact enclosure suitable for DIN rail mounting and connect to the Central Unit via a backplane or proprietary connector.

Product Parameters

The specific parameters vary by model and series, but standard specifications for an EATON Relay Input Module include:

• Input Voltage Range: Often designed to accept a common industrial AC or DC voltage, such as $120 \text{ V}_{\text{AC}}$, $230 \text{ V}_{\text{AC}}$, or high-voltage $\text{DC}$ (e.g., $48 \text{ V}_{\text{DC}}$).

• Number of Channels: Typically $4$, $8$, or $16$ discrete input points per module.

• Isolation: High channel-to-channel and channel-to-backplane isolation, often specified in Volts (e.g., $500 \text{ V}_{\text{AC}}$).

• Input Delay Time: The time required for the module to recognize a change in the input state, typically in the range of $1$ to $10 \text{ milliseconds}$.

• Current Consumption: The amount of power drawn from the system's backplane power supply, usually in milliamperes (mA).

• Status Indicators: Includes an LED status indicator for each input channel to show the current ON/OFF state for diagnostics.

• Wiring Connection: Utilizes robust screw terminals or spring-cage terminals for secure field wiring.

Product Advantages

The EATON Relay Input Module provides distinct advantages in industrial control systems. It offers superior electrical isolation and noise immunity compared to standard DC inputs, which is essential when dealing with long cable runs or noisy AC circuits, protecting the control system's integrity. The ability to directly interface with high-voltage AC or DC circuits simplifies the control panel design by eliminating the need for external signal conditioning relays. Its modular design allows for flexible system expansion, enabling users to add the precise number of input points required for the application. Furthermore, the inclusion of channel-specific LED diagnostics greatly simplifies troubleshooting and maintenance activities on the plant floor.

Important Considerations (Precautions)

Several key precautions must be taken when using the Relay Input Module. It is critical to match the field device's signal voltage exactly to the module's specified input voltage range to prevent damage to the module or the connected devices. Proper wiring practices must be followed, ensuring all connections are secure and observing torque specifications for screw terminals to avoid intermittent contact or short circuits. Care must be taken to segregate high-voltage input wiring from low-voltage DC signals and communication cables to minimize induced electrical noise. Before applying power, all wiring should be verified for correct polarity and connection scheme as defined in the system documentation.

Product Applications

The EATON Relay Input Module is widely applied wherever the PLC needs to read signals from devices operating at voltages higher than the standard $24 \text{ V}_{\text{DC}}$ or $\text{AC}$ line voltage. Typical applications include:

• Heavy Machinery Control: Reading the status of high-power contactors, motor starter auxiliary contacts, and thermal overload relays.

• Process Interlocks: Monitoring safety interlocks, emergency stop pushbuttons, and protective switches operating on $\text{AC}$ power.

• Building Automation: Interfacing with building systems like fire alarms, security panels, and high-voltage limit switches on dampers and valves.

• General Industrial Monitoring: Reading the status of older or specialized sensors and control panels that provide $\text{AC}$ or high-voltage $\text{DC}$ feedback signals.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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