Key Technical Specifications
- Product Model: ETH4 CN4-BELL
- Manufacturer: EKF Elektronik GmbH
- Product Category: Industrial Ethernet Controller / Remote I/O Module
- Interface Type: Gigabit Ethernet (10/100/1000 Mbps)
- Supported Protocols: TCP/IP, UDP, Modbus-TCP, EtherNet/IP
- Alarm Output: 1 Channel (24VDC) for Buzzer/Bell/Warning Light
- Digital I/O: Multiple configurable DI/DO channels
- Power Supply: 24 VDC
- Operating Temperature: -40 °C to +85 °C
- EMC Standard: EN55022, IEC61000
- Installation Method: 35mm DIN Rail Mounting
- OS Compatibility: Windows, Linux, VxWorks, RTOS
Product Introduction
The EKF ETH4 CN4-BELL is an industrial-grade Ethernet remote I/O module designed for distributed automation networks. It communicates with upper-level control systems like PLCs and SCADA platforms via standard TCP/IP protocols to manage field sensors and actuators.The “BELL” designation indicates a dedicated 24VDC alarm drive output, eliminating the need for external intermediate relays. Operating across a -40°C to +85°C range with IEC61000 EMC shielding, this module maintains signal integrity in harsh environments while supporting high-throughput, low-latency Modbus-TCP data exchange.
Installation & Configuration Guide
Preparation (10 min)
Verify your 24VDC power supply capacity. Ensure you have a standard 35mm DIN rail and appropriate screwdrivers. Review the network topology to determine if the module will act as a linear or star node.Removal (5–10 min)
Disconnect field wiring and note terminal assignments. Unclip the module from the DIN rail. Inspect the backplane connector for bent pins or corrosion before proceeding.Installation (10 min)
Slide the ETH4 CN4-BELL onto the DIN rail until it clicks. Reconnect field wiring according to the terminal diagram. Connect the Ethernet cable to the designated port. Double-check all mechanical connections.Power-On & Test (10 min)
Apply 24VDC power. Observe the LED indicators for power, network link, and channel activity. Access the web interface or configuration tool to assign an IP address. Trigger a test alarm to verify the BELL output circuit.
Troubleshooting Quick Reference
- No Power LED: Check 24VDC supply at the terminal block. Measure with a multimeter to confirm voltage is within ±10%.
- Network Link LED Off: Verify Ethernet cable continuity. Confirm switch port is active and not disabled. Check for IP subnet mismatches.
- I/O Not Responding: Validate Modbus-TCP register mapping in the PLC. Ensure the correct port number is configured. Check for wiring shorts at the field device.
- Alarm Output Fails: Measure voltage at the BELL output terminals during a triggered state. Verify the connected load does not exceed the 24VDC rating.
- Intermittent Communication: Inspect Ethernet connectors for loose crimps. Check for EMI sources near the DIN rail. Verify grounding practices.
Dimensions, Mounting & Wiring Notes
- Mounting: Standard 35mm DIN rail
- Wiring Note: Use shielded twisted-pair cable for Ethernet connections. Ground the shield at the cabinet side only. Keep signal wiring separated from high-voltage power conductors by at least 200mm.
- Terminal Note: Torque terminal screws to manufacturer specification to prevent thermal cycling failures.
FAQ
Will this replace my older EKF module without reconfiguring the PLC?
Not necessarily. Check the hardware revision and firmware version. Even within the same model family, register maps can shift between revisions. Always compare datasheets before swapping.Can I use this in a hazardous area?
No. This module lacks intrinsic safety or explosion-proof certifications. Install it in a safe-area control panel with proper NEMA/IP enclosure ratings.I lost the configuration software. Where do I get it?
Contact EKF directly or your authorized distributor. The configuration tool is typically provided on a USB drive or via secure download link with purchase documentation.What is the actual lead time if not in stock?
Lead times vary by region and current production schedules. We provide verified availability at the time of quote. For critical replacements, ask about tested surplus inventory.Is the BELL output isolated from the I/O channels?
Yes. The alarm output circuit is electrically isolated from the digital I/O and Ethernet circuits. This prevents ground loops when driving external buzzers or warning lights.How do I know if the module is genuinely new or refurbished?
We clearly state condition on every listing. New Original means factory sealed. Refurbished units undergo full functional testing and are documented with a test report. Ask us for specifics if the listing is unclear.
