Yokogawa ACM12 RS422/485 Communication Module

Overview

The Yokogawa ACM12 RS-422/RS-485 communication module provides seamless integration between Yokogawa control systems and external devices. It supports both RS-422 and RS-485 protocols, ensuring flexible connectivity for long-distance and multi-point communication in industrial automation. With robust insulation, wide temperature tolerance, and vibration resistance, it delivers reliable performance in harsh environments.

Technical Specifications

• Model: ACM12 RS-422/RS-485
• Manufacturer: Yokogawa Electric Corporation
• Communication Protocols: RS-422 (full duplex), RS-485 (half duplex)
• Supported Modes: Point-to-point (RS-422/RS-485), Multi-point (RS-485)
• Baud Rates: 300 to 115,200 bps
• Data Formats: ASCII / Binary
• Data Length: 7 or 8 bits
• Stop Bits: 1 or 2
• Parity: None / Odd / Even (Note: None not supported at 19200 bps)
• Communication Method: Asynchronous, half-duplex (RS-485) or full-duplex (RS-422)
• Transmission Distance: Up to 1200 meters
• Interface: 1 RS-422/RS-485 port
• Cable Type: Shielded twisted pair or AKB161 cable
• Connection Method: M4 screws to 6-pin terminal block
• Insulation: Photo coupler insulation between communication line and PLC bus
• Power Consumption: 1 A @ 5.0 V DC or a few hundred mA from PLC backplane
• Operating Temperature: –20°C to +70°C
• Vibration Resistance: Suitable for harsh industrial environments