Product Details:

The 39ACM12NAN is a compact ACM advanced control processor originally developed by Moore under Siemens APACS+ DCS platform, designed for small-scale process control applications with limited control logic and loop quantity. Compared with 39ACM14 and 39ACM28 series, this 12-version has smaller memory capacity and lower scan resource consumption, suitable for basic PID loops and simple sequential logic tasks. It supports redundant pairing configuration to achieve bumpless transfer between primary and backup units and avoid unexpected process shutdown during controller failure.

It fits into the standard ACMx rack slot and communicates with ACMx I/O modules via high-speed backplane bus. Built-in diagnostic functions continuously monitor bus synchronization, memory integrity, program execution status and redundant partner working condition, and push fault alarm messages to the system HMI for rapid maintenance. The suffix NAN defines its hardware version and functional configuration, and it cannot be directly replaced by ACM controllers with different suffix codes. It only works within ACMx racks and is incompatible with QUADLOG CCMx safety 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 mode, redundant synchronization state and fault codes for convenient on-site inspection. Hot swap can be performed under specific rack operation modes, but 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 installation, technicians need to match the rack firmware version and complete offline redundant switchover test. Mismatched firmware will lead to redundant synchronization failure.

Industry Applications: Applied in small chemical auxiliary skids, local water treatment control units, single-loop boiler auxiliary systems and pipeline monitoring stations for basic PID regulation and simple interlock logic processing.

Note: Confirm rack firmware version and redundant function configuration before ordering

This is from our current stock.