The ACM11 (Model: ACM11) is a high-performance subsystem communication module designed for the Yokogawa CENTUM CS 3000 and CENTUM VP Distributed Control System (DCS) environments. This module functions as a critical bridge between the Field Control Station (FCS) and external subsystems such as PLCs, sequencers, and specialized analyzers. The ACM11 (Part Number: ACM11) facilitates seamless data exchange by mapping subsystem data into the PI/O image area, which is then accessed by the FCS via the RIO bus.
Engineered for industrial reliability, the ACM11 (Module: ACM11) features galvanic isolation and advanced error detection to ensure data integrity in electronically noisy plant environments. By offloading serial communication tasks—including protocol handling for RS-232C, RS-422, and RS-485—it preserves the main processor's CPU efficiency. This module is an essential component for integrating third-party equipment into a unified Yokogawa control architecture, providing the deterministic connectivity required for petrochemical, power, and water treatment applications.
The ACM11 (ACM11) is built to support diverse serial communication standards within a ruggedized DCS rack.
| Parameter | Specification |
| Manufacturer | Yokogawa |
| Model Number | ACM11 |
| Suffix Code | S2 (Sealed / NSS compliant) |
| Product Type | Subsystem Communication Module |
| System Bus Interface | RIO Bus (Remote I/O Bus) |
| Serial Interfaces | RS-232C, RS-422, RS-485 |
| Power Supply | 12 VDC / 24 VDC (Internal via rack) |
| Isolation | Galvanic Isolation (Signal and Power) |
| Transmission Speed | High-speed asynchronous/synchronous support |
| Operating Temp | –20 °C to +60 °C |
| Dimensions | 130 mm × 100 mm × 42 mm (Module base) |
| Weight | 0.25 kg |
| Mounting | Standard I/O Nest / Rack Mount |
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