PLCs, Power Supplies & Others

The Yokogawa ACM12 establishes a robust serial link for the CENTUM DCS. This module supports both RS-422 and RS-485 communication protocols. It handles long-distance data transmission with excellent noise immunity. Therefore, this module suits factory floors with distributed equipment layouts.

Unlike the RS-232C variant, the ACM12 uses a differential signaling method. This design allows cable runs up to 500 meters without signal degradation. You can connect multiple field devices on a single 4-wire bus system.

Technical Specifications

Many engineers integrate this module with protection devices like the RMS-TSG-TZ-C Static Trip for comprehensive system safety . The Yokogawa ACM12 excels in multi-drop network configurations.

Hardware & Interface Details

The Yokogawa ACM12 fits into a standard Communication Module Nest inside the CENTUM CS cabinet. You must use a dedicated AKB337 or AKB339 cable for proper termination. The module provides terminal resistors on the printed circuit board for line matching.

Furthermore, this module supports data rates from 1200 bps up to 19200 bps. It employs start-stop synchronization for reliable character framing. The ACM12 also features built-in surge suppression for industrial environments.

Installation & Power Management

This communication module draws a maximum of 2.5 A from a 5.0 V DC supply. It does not store significant energy in capacitors or batteries. Consequently, the module allows safe removal and insertion under most conditions.

Engineers appreciate the ACM12 for its plug-and-play configuration via DIP switches. You can set station addresses and termination resistors manually. The operating temperature ranges from 0°C to 55°C for indoor control rooms.

Details