
Product Overview
The Yokogawa ACM71 Ethernet Communication Module is a high-performance industrial Ethernet interface module designed for Yokogawa CENTUM Distributed Control Systems (DCS). It enables reliable data communication between control systems and Ethernet-based networks using standard IEEE 802.3 protocols.
This module is used to connect control stations, subsystems, and field devices to industrial Ethernet networks, ensuring fast and stable data exchange in distributed automation architectures.
With its compact design and stable communication performance, the ACM71 is widely applied in systems requiring real-time Ethernet communication and seamless system integration.
Technical Specifications
| Parameter |
Details |
| Manufacturer |
Yokogawa |
| Model |
ACM71 |
| Product Type |
Ethernet Communication Module |
| Function |
Industrial Ethernet communication interface |
| System Compatibility |
CENTUM CS 1000 / CENTUM CS 3000 / CENTUM VP |
| Ethernet Standard |
IEEE 802.3 |
| Communication Speed |
10/100 Mbps (auto-negotiation depending on system version) |
| Interface |
RJ45 Ethernet port |
| Protocol Support |
TCP/IP, UDP, ICMP |
| Transmission Distance |
Up to 100 m per segment |
| Network Type |
Point-to-point / hub-based connection |
| Power Supply |
5 V DC (backplane powered) |
| Current Consumption |
Approx. 1.2 A or lower |
| Operating Temperature |
0°C to 50°C |
| Mounting Type |
Rack-mounted communication slot |
| Dimensions (H × W × D) |
180 × 55 × 100 mm |
| Weight |
0.5 kg |
Function and Working Principle
The ACM71 operates as an Ethernet communication gateway module within Yokogawa control systems.
Its working process includes:
- Receiving data from the DCS controller
- Converting internal control signals into Ethernet communication frames
- Transmitting data over standard TCP/IP networks
- Receiving external network data from subsystems or host systems
- Processing and forwarding data back to the control system
This enables fast, stable, and standardized Ethernet communication across industrial automation systems.
Role in Industrial Control Systems
Within Yokogawa CENTUM architecture, the ACM71 functions as a core Ethernet communication interface module.
Its key roles include:
- Connecting DCS systems to Ethernet networks
- Enabling communication between control stations and subsystems
- Supporting real-time industrial data exchange
- Integrating control systems with higher-level monitoring platforms
- Improving system scalability and network flexibility
It is essential for maintaining modern industrial Ethernet-based control architectures.
Industrial Applications
The ACM71 is widely used in:
- Oil and gas control systems
- Petrochemical and refinery plants
- Power generation facilities
- Large-scale distributed control systems
- Industrial SCADA systems
- Process monitoring and automation networks
It is especially suitable for environments requiring fast Ethernet communication and centralized data integration.
Installation and System Integration
Proper installation ensures stable operation:
- Installed in Yokogawa communication module racks
- Connected via RJ45 Ethernet interface
- Requires correct network configuration (IP and protocol settings)
- Shielded Ethernet cables recommended for industrial environments
- Integrated using Yokogawa engineering configuration tools
Correct setup ensures reliable communication and stable network performance.
Compatible System Components
The ACM71 typically works with:
- Yokogawa CENTUM controllers
- Human Interface Stations (HIS)
- Industrial Ethernet switches and hubs
- Field control stations (FCS)
- Subsystem and gateway modules
These components form a complete Ethernet-based industrial control network.
Recommended Alternative Models
| Model |
Type |
Key Feature |
Application |
| Yokogawa ACM12 |
Serial Communication Module |
RS-422/485 long-distance communication |
Distributed systems |
| Yokogawa ACM22 |
Serial Communication Module |
Multi-point RS-485 support |
Industrial networks |
| Yokogawa ACM21 |
Communication Module |
RS-232 point-to-point |
Legacy integration |
| Yokogawa ABC11D |
Bus Converter |
Redundant communication architecture |
High-availability systems |
| Yokogawa Ethernet Gateway Modules |
Gateway |
Advanced protocol integration |
Complex networks |
Key Advantages
- Industrial Ethernet communication support
- Stable TCP/IP-based data exchange
- Easy integration with CENTUM systems
- Compact and lightweight design
- Supports real-time data transmission
- Flexible network architecture compatibility
- Suitable for modern distributed control systems
Technical FAQs
Q1: What is the main function of the ACM71?
It enables Ethernet communication between Yokogawa DCS systems and external networks.
Q2: What protocol does it support?
It supports TCP/IP, UDP, and ICMP protocols.
Q3: What is the maximum transmission distance?
Up to 100 meters per Ethernet segment.
Q4: Where is it commonly used?
It is used in industrial automation, DCS systems, and SCADA networks.
Q5: What is the difference between ACM71 and serial modules?
ACM71 uses Ethernet communication, while others like ACM12 or ACM22 use RS-422/485 serial communication.
Conclusion
The Yokogawa ACM71 Ethernet Communication Module is a reliable and efficient solution for industrial Ethernet communication. With its stable TCP/IP connectivity, compact design, and seamless integration into Yokogawa CENTUM systems, it ensures fast and dependable data exchange across modern automation networks.
It is widely used in industries where real-time communication, system integration, and network scalability are essential.