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Product Introduction
The Yokogawa ACM22 RS-422/485 Communication Module is a high-performance serial communication interface for integration with Yokogawa CENTUM CS 3000 and compatible control systems. It provides reliable RS-422/485 communication between controllers, field devices, and third-party devices. The module enables seamless system expansion and integration with minimal configuration effort.
Product Advantages
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Stable and noise-resistant RS-422/485 communication.
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Flexible configuration for point-to-point and multi-drop topologies.
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High compatibility with Yokogawa FCS and ESB systems.
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Robust design suitable for industrial environments.
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Easy maintenance with modular plug-in structure.
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Built-in diagnostics with LED indicators for quick troubleshooting.
Technical Specifications
| Parameter | Description |
|---|---|
| Model | Yokogawa ACM22 |
| Communication Interface | RS-422 / RS-485 |
| Supported Protocols | Modbus RTU, Yokogawa proprietary |
| Communication Speed | 300 bps to 115.2 kbps |
| Topology | Point-to-point, multi-drop |
| Isolation | Optical and galvanic isolation |
| Power Supply Voltage | 5 V DC |
| Power Consumption | 1.5 W |
| Diagnostic Indicators | Link, TX/RX, and status LEDs |
| Operating Temperature | 0 to 50°C |
| Storage Temperature | -20 to 70°C |
| Humidity Range | 10 to 90% RH non-condensing |
| Mounting | DIN rail or backplane |
| Dimensions | 125 x 130 x 248 mm |
| Weight | 0.14 kg |
Product Applications
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Power generation and distribution networks for intelligent relays and meters
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Oil and gas plants for serial communication with field devices
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Chemical and petrochemical facilities connecting analyzers and PLCs
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Water and wastewater treatment systems for remote data acquisition
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Manufacturing automation systems requiring reliable RS-485 networks
FAQ
Q1: What communication protocols does the ACM22 support?
A1: It supports Modbus RTU and Yokogawa proprietary protocols over RS-422 and RS-485 interfaces.
Q2: Can the ACM22 operate in both half-duplex and full-duplex modes?
A2: Yes, configuration allows operation in either mode depending on network setup.
Q3: Is electrical isolation provided between communication ports and the system bus?
A3: Yes, both optical and galvanic isolation are implemented to prevent interference.
Q4: What is the maximum RS-485 communication distance?
A4: Up to 100 meters using shielded twisted-pair cables.
Q5: Can the ACM22 communicate with third-party PLCs?
A5: Yes, as long as the PLC supports Modbus RTU or RS-485 standards.
Q6: What baud rates are supported?
A6: 300 bps to 115.2 kbps, configurable via engineering software.
Q7: Is there any special configuration required for multi-drop RS-485 lines?
A7: Yes, proper termination resistors and unique node addresses are required.
Q8: Does ACM22 support redundant system configurations?
A8: Yes, it can be integrated into redundant systems for continuous operation.
Q9: How is module status monitored during operation?
A9: LEDs indicate link, transmission, and error status for on-site diagnostics.
Q10: Can firmware updates be performed without shutting down the system?
A10: Yes, updates are applied via the engineering tool with minimal communication interruption.
Related or Same-Series Models
| Model | Description |
|---|---|
| ACM11 | RS-232 Communication Module |
| ACM12 | RS-422/485 Dual Channel Module |
| ACM21 | Multi-protocol Communication Interface |
| ACM23 | High-speed RS-485 Module |
| ACM24 | RS-422/485 Module with extended diagnostics |
| ACM25 | Dual-port Communication Module for redundancy |
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