Product Description:

The C9900-M667 is a mechanical mounting accessory manufactured by Beckhoff as part of the C9 PC Accessories series. It serves as the attachment kit that fixes a C601x ultra-compact industrial PC to a DIN rail, allowing the computer to reside in the same control cabinet as drives, I/O terminals, and other automation hardware. The kit ships as a single part and is not mounted, and it requires no cabinet preparation beyond the clearances stated in the data set. By providing a dedicated interface on the right-hand side of the PC, it allows the computer to be relocated or replaced without drilling new holes or modifying panel layouts.

The bracket is coupled to the rail through a DIN rail interface that matches the 35 mm profile commonly found in switchgear assemblies. Four captive screws with a Torx TX10 head secure the plate to the PC housing, and the fastener quantity is 4 to keep clamping force even across the aluminum chassis. Each screw is tightened to 0.5 Nm, which helps prevent thread damage while still holding the device firmly during vibration. Because the intended installation point is the control cabinet, the accessory uses plated steel parts that tolerate elevated temperatures and electromagnetic fields near power equipment. The unit arrives with no additional brackets, shims, or wiring, so it can be stocked as a spare without a multicomponent parts list.

The kit supports three attachment orientations: Rear, Top, and Bottom, so airflow paths can remain unobstructed and cables can align with existing wiring ducts. Adjacent components must remain at least 20 mm away on the horizontal axis, and a vertical clearance of 50 mm is required to release the spring latch during service. When mounted, the computer’s connectors face the enclosure door while the mounting plate sits on the right-hand side panel, simplifying cable routing toward control-panel raceways. Cabinet preparation remains unnecessary because the rail and screw positions are governed entirely by the accessory itself.