The CHQ-SUB Assembly is a set of replacement components designed to fit any of the existing CHQ Modules: CHQ-DIM(SCI), CHQ-SZM(SCI), CHQ-DZM(SCI), CHQ-DSC(SCI), CHQ-MRC(SCI), CHQ-DRC(SCI), CHQ-ISM and CHQ-PCM.

The sub-assembly consists of the PCB tray, PCB cover and semi-opaque lid and can be used in cases where an existing module housing becomes damaged and needs replacement.