Excellent PLC
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Introduction
The Yokogawa ACM21 RS-232 Communication Module is a high-performance serial communication interface designed for reliable data transfer in distributed control systems. It enables seamless connectivity between field devices, controllers, and monitoring units using RS-232. Its compact design and robust construction make it suitable for integration into Yokogawa CENTUM and STARDOM systems, ensuring consistent performance in industrial environments.
Product Advantages
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Reliable RS-232 communication between control systems and external devices.
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Optical isolation to reduce noise and interference.
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Flexible configuration for multiple communication modes.
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Compact and easy to install or replace.
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Compatible with Yokogawa DCS systems and third-party devices.
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Industrial-grade durability for stable operation under varying environmental conditions.
Technical Specifications
| Parameter | Description |
|---|---|
| Product Model | ACM21 |
| Communication Type | RS-232 Serial Interface |
| Transmission Rate | Up to 115.2 kbps |
| Isolation | Optical isolation between field and system |
| Connector | D-sub 9-pin female |
| Power Supply | 24 V DC ±10% |
| Power Consumption | 2.5 W |
| Supported Protocols | RS-232C, Modbus RTU, Yokogawa proprietary protocols |
| Indicators | TX/RX LEDs |
| Operating Temperature | 0 to 55 °C |
| Storage Temperature | -20 to 70 °C |
| Relative Humidity | 10% to 90% RH (non-condensing) |
| Dimensions | 125 × 130 × 248 mm |
| Weight | 0.14 kg |
| Mounting | DIN rail or panel |
| Certification | CE, UL, CSA |
Product Applications
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Connecting control systems to serial instruments such as analyzers and sensors.
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Data acquisition and logging in industrial automation systems.
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Supervisory monitoring and alarm systems.
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Integrating DCS subsystems with external computing devices.
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Industrial applications in oil & gas, chemical, power generation, and water treatment plants.
Installation Instructions
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Power down the system before installation.
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Mount the module on a DIN rail or panel.
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Connect the RS-232 communication cable.
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Wire the 24 V DC power supply.
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Power on and verify TX/RX LED indicators.
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Configure communication settings (baud rate, parity, protocol) via system software.
FAQ
Q1: What is the main function of the ACM21 module?
A1: It provides RS-232 serial communication between Yokogawa control systems and external devices such as analyzers, sensors, or computers.
Q2: Does the ACM21 support Modbus communication?
A2: Yes, it supports Modbus RTU over RS-232 for integration with third-party devices.
Q3: How is communication status monitored?
A3: The module features TX and RX LEDs that indicate active transmission and reception.
Q4: Can the baud rate be configured?
A4: Yes, baud rates up to 115.2 kbps can be set through system configuration software.
Q5: What type of connector is used for RS-232?
A5: A standard D-sub 9-pin female connector is used for communication.
Q6: Is the ACM21 suitable for redundant communication setups?
A6: Yes, it can be paired with other modules to implement dual-port or redundant communication systems.
Q7: Does the module have isolation between power and communication circuits?
A7: Yes, optical isolation is provided to protect against electrical interference.
Q8: Can the ACM21 be installed alongside RS-485 modules?
A8: Yes, it can coexist with RS-422/485 modules without causing signal interference.
Q9: What are the power requirements?
A9: The module operates on 24 V DC ±10% and consumes 2.5 W.
Q10: How many communication channels does the ACM21 provide?
A10: The module has one dedicated RS-232 communication port.
Related Models
| Model | Description |
|---|---|
| ACM22 | RS-422/485 Communication Module |
| ACM12 | RS-232 Interface Module with improved noise immunity |
| ACM11 | Serial Communication Interface for network integration |
| ACM24 | Multi-port RS-232/RS-485 Module |
| ACM25 | Dual-channel RS-232 Module for redundancy |
| ACM31 | Advanced RS-232/422 Module with diagnostics |
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