The Yokogawa ACM12, also cataloged as the ACM12 Communication Module, operates as a dedicated hardware component for serial communication within industrial automation systems.
Suffix Breakdown & Model Matrix
The catalog designation ACM12 establishes the primary hardware architecture for the RS-422/RS-485 serial interface module designed to support serial data transfer.
Hardware Specifications
Parameter
Specification
Model
ACM12
Brand
Yokogawa
Origin
Global Manufacturing Facility
Weight
Not Specified
Dimensions
Not Specified
Operating Temp
Not Specified
Power Consumption
1 A (5.0 V DC)
Interface
RS-422/RS-485 (1 port)
Communication Mode
Half-duplex
Transmission Distance
Max. 1200 m (total length)
4-20 mA HART Loop Protocol and Channel Isolation
The communication module manages serial data streams across industrial networks while maintaining precise electrical parameters. Key operational characteristics include:
Supporting point-to-point and multipoint connection architectures using an RS-422/RS-485 interface configuration.
Utilizing start-stop synchronization across communication speeds of 1200, 2400, 4800, 9600, and 19200 bps with ASCII or Binary transmission codes.
Maintaining selectable parity checks (None/Odd/Even) and character/stop bit length configurations to ensure reliable data framing over extended transmission distances up to 1200 meters.
Frequently Asked Questions
Q: Can the ACM12 communication module be installed in the same nest with an ACF11?
A: No. The ACM12 cannot be combined with an ACF11, though an ACM11 can be combined with an ACM12 within the Communication Module Nest.
Q: What are the parity settings available at 19200 bps?
A: "No parity" is not available when operating at 19200 bps; only Odd or Even parity check configurations are supported at this speed.
Field Installation Guidelines
Ensure all associated power feeds and backplane supplies are completely de-energized and locked out (LOTO) prior to module insertion or removal.
Install the module directly into the designated Communication Module Nest, verifying that incompatible modules such as the ACF11 are not co-located.
Terminate field wiring using a 3-pair shielded cable or an approved connection assembly (such as AKB161 for FA500 connections up to 100 m).
Connect the D-sub 25-pin (female) interface securely to the 6-pole terminal using M4 screws, maintaining proper signal shielding and ground continuity.
