Description

EKF ETH4 CN4-BELL Ethernet I/O Module (with Signal Function)

Overview

EKF ETH4 CN4-BELL is an industrial-grade Ethernet remote I/O module produced by EKF Company. EKF is a well-known German manufacturer of electrical automation products, renowned for its high-quality and reliable industrial connection and automation solutions.

The core function of this module is to act as a distributed input/output (I/O) node, communicate with the upper-level control system (such as PLC, DCS, SCADA or industrial PC) via Ethernet protocol, and connect to the sensors and actuators on site. The “BELL” in the model usually indicates that the module integrates an alarm or buzzer drive output function, which is often used for equipment status alarm, fault reminder or process signal indication.

Core features and advantages

Integrated alarm signal output (BELL function)
The module is equipped with a dedicated output channel for directly driving a 24V DC alarm (Buzzer/Bell) or warning light. This eliminates the need for external intermediate relays, simplifies wiring and saves space inside the cabinet.

This alarm output can be configured through software and triggered by specific control logic or diagnostic events (such as module failures, channel errors, etc.) to achieve localized audible and visual alarms.

2. High-performance Ethernet communication
Supports standard Ethernet TCP/IP protocols to ensure high-speed and stable data exchange with mainstream automation systems.

It may support multiple industrial protocols, such as Modbus TCP (commonly found in EKF products), enabling it to be easily integrated into almost all brands of PLCS or monitoring systems.

Network parameters such as IP addresses can be easily set through a web browser or dedicated configuration software.

3. Modular and compact design
It adopts a compact modular design and can be installed on standard DIN rails, saving space in the control cabinet.

“ETH4” and “CN4” may indicate that it has 4 Ethernet ports (for building linear or star network topologies to enhance cabling flexibility) and 4 connectors (for I/O expansion or specific functions).

CN4-BELL

4. Industrial-grade reliability and ease of use
The design complies with strict industrial standards, features high resistance to electromagnetic interference (EMC), a wide operating temperature range, and is suitable for harsh industrial environments.

It provides LED status indicator lights for quick diagnosis of power supply, network status and the activity of each channel.

Configuration is usually accomplished through intuitive software tools, and the Settings are simple and quick.

Typical application fields

This module is widely applied in automation scenarios that require remote I/O control and integrated alarm functions
• Factory automation: Distributed control and status alarm for production lines, packaging machines, and assembly lines.

• Process control: Status monitoring and fault alarm of pumps and valves.

• Building automation: HVAC systems, lighting control, safety status alerts.

• Energy Management: Equipment status monitoring and abnormal alarm within distribution cabinets.

• Any situation where scattered I/O signals need to be centrally managed via Ethernet and accompanied by audible and visual alarms.

Technical Specification Summary (Derived Based on Model and Commonalities of EKF products)

• Manufacturer: EKF

Model: ETH4 CN4-BELL

◦ ETH: Ethernet interface

◦ 4: It may represent the number of ports or versions

◦ CN4: It may represent 4 connectors or 4 channels

◦ BELL: Integrated alarm drive output function

• Communication protocol: It is highly likely to support Modbus TCP/IP, and may support other protocols

• Alarm output: 1 channel, usually 24VDC, used to drive the alarm or warning light

• Digital I/O: likely has multiple configurable digital input and output channels (DI/DO)

• Power supply: Usually 24 VDC

• Installation method: 35mm DIN rail mounting

• Software configuration: It may be done through the Web interface or dedicated configuration tools (such as EKF’s configuration software)

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