What is this? Does this mean that this module is necessary for communication with fire and alarm system?Same configuration is applied for VCM-2?if that is the case, GCME instrument should install this module the deluge switch panel they will provide?In which case, GCME electrical should supply this module to GCME instrument, correct?AVT is not sure the wiring configuration between deluge switch panel and fire and alarm system cabinet. Please clarify the wiring configuration in between and purpose of this module.