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LifeGuard Networks
58 Chocksett Rd.
Sterling, MA 01564


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DA40 40 Watt Digital Amplifier
The DA40 digital amplifyer provides a compact, cost effective 1X 25 Volt 40 Watt Digital Amplifier. The 40 Watt output can be configured as either a Class B (Style Y) or Class A (Style Z) supervised speaker circuit. Onboard flash storage can accomidate up to 16 pre- recorded messages for a total of 20 minites of audio. Message playing can be triggered by either two independent dry contact trigger inputs or an RS-485 interface. In applications where more than 40 Watts is necessary, additional DA40 can be used as an audio booster. The DA40 can be configured to also communicate and page to other DA40s over the RS-485 bus. This includes Floor-Above and Floor-Below functionality. An on board normally opened or normally closed contact is included to indicate all DA40 trouble conditions.

Standard Features

  • Durable 16 ga steel cabinet w/silver vein powder coat with removable secure key locked door. Dimensions: 13 ½” x 13 ½” x 3 ½” deep.
  • 1 25v 40 Watt Supervised Speaker Circuit
  • 2 Message Trigger Inputs
  • 6 LED status indicators
  • Push To Talk (PTT) Microphone Interface
  • 16 message Flash storage
  • USB interface for message and firmware download
  • Isolated RS-485 interface used for monitoring, control and paging
  • Remote paging capabilities
  • Booster input /pass through
  • Trouble contact NO/NC outputs
  • 24V power supply with battery backup