Product Details:

  The 39ACM28ADN is a high-performance ACM advanced control processor originally developed by Moore under the Siemens APACS+ DCS platform, equipped with 8MB onboard memory, which provides larger program storage and data buffer capacity compared with the 39ACM14BAN version. It is designed to handle complex multi-loop PID regulation, cascade control, ratio control and large sequential logic tasks for medium and large process units. This rack-mounted processor supports redundant pairing configuration to achieve bumpless transfer between primary and backup units and prevent unexpected process trips during controller failure.

 It plugs into the standard ACMx rack and communicates with all I/O modules through the high-speed backplane bus. The built-in comprehensive diagnostic system continuously monitors bus synchronization status, memory integrity, program execution and fault state of the redundant partner, and sends fault prompts to the system HMI for rapid troubleshooting. The suffix ADN defines its hardware version and functional configuration, and it cannot be directly replaced by ACM controllers with different suffix codes. It works only within APACS+ ACMx racks and is not compatible with QUADLOG CCMx racks.

 The PCB board adopts conformal coating to resist dust, condensation and light corrosive vapors in refinery and chemical control rooms. The front panel LED indicators clearly display running status, redundant synchronization state and fault codes for convenient on-site inspection. Hot swap can be performed under certain rack operating modes, but full process risk assessment must be completed before online replacement.

 Most stocked units are surplus modules recovered from decommissioned APACS+ control racks and fully tested. Before commissioning, technicians need to verify the firmware version matching the rack system and complete redundant switchover testing offline. Mismatched firmware will lead to synchronization failure between primary and backup controllers.

Industry Applications: Applied in petrochemical production units, natural gas processing skids, large boiler control systems and chemical reaction facilities for complex multi-loop PID control and sequential logic processing.

Note: Confirm rack firmware version and redundant configuration before ordering

This is from our current stock