Product Details:

SIEMENS QLCCM12AAN is a core critical control module (CCM) designed for the QUADLOG and APACS+ distributed control rack systems, dedicated to executing safety-related closed-loop control logic, processing bus data and coordinating communication with all I/O cards on the backplane. Powered by 24V DC, it undertakes core calculation tasks for key process loops, receiving field signal data from analog and discrete modules, running PID algorithms, interlock logic and alarm judgment, then issuing control commands to output modules for field actuators. It adopts industrial-grade reinforced PCB structure and multi-layer EMC shielding layout, built-in watchdog circuit, hardware fault self-test and communication error detection mechanism, which can continuously monitor internal CPU status, memory and bus link quality, and trigger fault alarms immediately once abnormal conditions are captured.

It features standard backplane plug-in form factor and supports hot swap in compatible rack configurations. Maintenance technicians can replace the faulty module without shutting down the whole control rack, greatly cutting unplanned production downtime and maintenance cost. The control logic and loop parameters can be downloaded, edited and monitored via APACS+ engineering configuration software, supporting flexible adjustment for different safety loop requirements. This legacy module is widely used for the maintenance and retrofit of old QUADLOG systems. Every spare unit will complete full function testing, bus communication test and rack compatibility verification before shipment to guarantee stable matching with original QUADLOG hardware. It is a frequently stocked emergency spare part for retired process automation control systems.

Industry Applications: Applied in petrochemical auxiliary skids, gas flow control systems, boiler closed-loop control rooms and water treatment facilities for conventional analog signal acquisition and valve regulating output.

Note: Confirm SAM combined I/O feature and hardware revision before ordering

This is from our current stock.