Wheelock DSM-12/24-R Sync ModuleThe Wheelock DSM 12 24 R synchronization module combines separate strobe and audible NAC inputs into a single synchronized output for compatible Wheelock notification appliances. It supports synchronized Code 3 temporal horn and synchronized strobe flash, and it can silence the horn while keeping strobes active using one pair of wires. It controls one Class A or two Class B NAC circuits and handles up to 3 A per circuit at 12 or 24 VDC.