Does the D7038 have built in Sync?
No, the Sync module is needed. The D7038 Input will pass the Sync Pulse to each Output.
Sync Module Part Numbers
Brand Name Sync Module Part Number
System Sensor MDL
Wheelock DSM; SM
Gentex AVS44; AVSM
Note: If the DS9400 Series or D7024 Series panel is used with the D7038, NAC's 1 or 2 on the D7024 or DS9400 can provide a Wheelock Sync pulse. If the Eprom Revision is 2.04 or higher, either panel series can also provide a Gentex Sync Pulse from NAC 1 and or NAC 2.
Part numbers DS9400, DS9400I, DS9400M , D7024, DS9484, D7038
Issue What could be the cause when adding four System Sensor Horn / Strobes to a Wheelock audio visual loop, and the horns are worrking fine but the strobes are not flashing correctly. Solution When installing Audio / Visual Appliances, all devices on the loop must be from the same manufacturer. Mixing System Sensor with Wheelock or Gentex or any combination may cause the Horns or the Strobes to work intermittently or not at all. This is because each manufacturer has their own Sync Pulse Protocol to run their notification devices.