DW Technical Bulletin To: DW® Customers Date: June 10, 2021 Re: VMAX® IP Plus™ DW-VP9xT4P Alarm Input Ground VMAX® IP Plus™ DW-VP9xT4P (3rd Generation) Alarm Input Ground Affected Model Numbers: DW-VP9-4P Effective Date: June 10, 2021 When connecting alarm inputs of external sensors for alarms and …