Phoenix Contact ILC 151 ETH Inline PLC Controller (2700974)

The Phoenix Contact ILC 151 ETH (order number 2700974) is a modular small‑scale controller for the Inline I/O system. This controller sits at the heart of the Easy Automation concept, offering a compact, powerful platform for decentralized automation tasks. It features an integrated Ethernet interface supporting both Modbus/TCP and PROFINET protocols, allowing seamless integration into industrial networks. The ILC 151 ETH includes a complete INTERBUS master (4096 I/O points) and can be expanded with standard Inline I/O modules. Programming is carried out using PC Worx Express or PC Worx, both compliant with IEC 61131‑3.

Technical Specifications

• Order Number: 2700974

• Model: ILC 151 ETH

• I/O System: Inline (modular)

• Local I/O: 8 digital inputs (24V DC, 5 mA) + 4 digital outputs (24V DC, 0.5 A)

• Maximum I/O Points: 4096 (via INTERBUS)

• Communication Protocols: PROFINET‑Device, Modbus/TCP‑Client

• Additional Protocols: HTTP, FTP, SNTP, SNMP, SMTP, SQL, MySQL

• Ethernet Interface: 1 × RJ45, 10/100 Mbps

• Programming Languages: IEC 61131‑3 (LD, FBD, ST, IL, SFC)

• Programming Software: PC Worx Express (free), PC Worx

• Memory Expansion: microSD card slot (up to 2 GB)

• Integrated Web Server: HTML5, FTP server

• Power Supply: 24V DC (19.2–30.0V)

• Current Consumption: 120 mA typical (logic)

• Operating Temperature: -25°C to +60°C

• Protection Rating: IP20

• Dimensions: 73 mm × 120 mm × 71 mm

Functional Description

The ILC 151 ETH executes the user program cyclically, with scan times typically under 10 ms. It can act as a PROFINET device, exchanging process data with a PROFINET IO controller (e.g., Siemens S7‑1500) or as a Modbus/TCP client, reading/writing data to other Modbus‑enabled devices. The controller also includes an INTERBUS master, supporting up to 4096 I/O points over a single INTERBUS network. The built‑in web server allows remote diagnostics, status monitoring, and HTML5‑based control pages.

Expandability and Memory

The local I/O of the ILC 151 ETH can be expanded using Inline I/O modules (digital, analog, temperature, counter) placed on the right side of the controller. A microSD card slot (up to 2 GB) is available for program backup, data logging, and firmware updates. The card can also be used to extend retentive memory for large recipe tables or historical data.

Programming Environment

Programming is performed with Phoenix Contact’s PC Worx Express (free for this controller) or PC Worx full version. The software supports all five IEC 61131‑3 languages and includes a built‑in PROFINET configuration tool. The controller can be programmed and debugged over Ethernet, and the web server provides access to variable monitoring and diagnostic logs.

Safety and Approvals

The ILC 151 ETH is certified for industrial use with approvals including ATEX, UL Listed, cULus Listed, DNV GL, BV, RINA, LR, and ABS. It meets CE and RoHS standards. The controller is rated for operation in ambient temperatures from -25°C to +60°C and is suitable for marine and offshore applications.

Typical Applications

This PLC is used in packaging machinery, conveyor systems, building automation, and water treatment plants. Its support for PROFINET makes it an ideal choice for integrating with Siemens‑based networks, while Modbus/TCP allows connection to energy meters and drives.

Conclusion

The Phoenix Contact ILC 151 ETH offers a flexible, IEC‑61131 programmable controller with robust communication options and expandable local I/O, providing a cost‑effective solution for modular automation systems.