Federal Signal PA640 Siren with Switchbox - StrobesNMore.com

Federal Signal PA640 Siren with Switchbox

an artwork by  Federal Signal
Federal Signal PA640 Siren with Switchbox
Federal Signal PA640 Siren

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Your Price:$439.99
Retail Price:$733.00
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Crystal controlled microprocessors, integrated circuits, and silicon based output transistors work together to make the PA640 the most reliable, most versatile totally enclosed siren/light controller available. PA640 sirens provide 100-watt output and will meet Class A and SAE J1849 requirements for sound when paired with any Federal Signal high output speaker. Every siren comes with its own mounting bracket, hard-wired microphone and is electronically short circuit and reverse polarity protected. The PA640 can operate from any 12-volt negative ground electrical system and be powered through a Federal Signal Power Distribution Center or directly from the vehicle battery. This compact siren (6.8"W x 3"H x 7.75"D) is packed with standard features, built-in versatility and product reliability that simply can't be matched by similar competitive products. Nine on-board relays are used to deliver 80 amperes of total switching capacity and can control primary, secondary, take down, alley, and auxiliary lighting circuits.

The PA640 siren has two built-in flasher circuits available, provides advanced "dynamic" short circuit protection and allows the installer to easily change switch functions via internal programming. Wail, Yelp, Priority or Hi-Lo, Manual Peak-and-Hold, and Air Horn, are all standard tones and can be enabled by a heavy-duty five position rotary switch. There are six backlighted rubber membrane auxiliary relay pushbutton switches, a user-friendly four position high current slide switch, separate pushbuttons for Air Horn and Manual activation, and a rotary PA/Volume control knob - all smartly located on the face-plate. Park-Siren Deactivation is built into the PA640 PC board. It is automatically activated once the vehicle transmission is shifted into Park. The Horn Ring Transfer (HRT) function allows siren and light step-through control and delivers effective traffic management, using the steering wheel horn ring.Unmatched versatility is achieved through internal programming built into the PA640 siren. Any of the six auxiliary pushbuttons can be changed from a standard on/off switch into a momentary, flasher, or eight second timer.

In addition, auxiliary relays, standard tones and even HRT functions can be programmed to operate off of any slide switch position desired. Advanced electronic technology that features the use of crystal-controlled microprocessors dramatically enhances the reliability of the PA640 siren. This type of microprocessor continuously monitors current flow between the output transistors and the speaker. This "dynamic" style of short circuit protection between the output transistors and the amplifier delivers a quicker, more effective way to protect your siren warning system.


  • RADIO Incoming radio messages are amplified by the siren and rebroadcast over the outside speaker
  • MANUAL Allows siren operation via the Air Horn or Manual pushbutton switches or through the vehicles horn ring if the HRT function is enabled
  • WAIL Produces continuous "wailing" sound
  • YELP Produces a continuous and rapid "warbled" tone
  • PRIORITY Produces a continuous and extremely rapid "warbled" tone


  • Full-featured electronic siren with light control, PA and Air Horn.
  • 100-watt output and 80 amp total switching capacity.
  • Advanced crystal controlled microprocessor technology.
  • Meets Class A and SAE J1849 sound output requirements.
  • Internally programmable tones, switch functions and relay outputs.
  • Reversed polarity and "dynamic" short circuit protection.
  • Horn Ring Transfer (HRT) and two built-in flashers included.


  • Approvals: SAE J1849 / July -02 compliant and CCR (CAC) Title 13 Class A
  • Voltage: 11 VDC to 16 VDC
  • Standby Current: 0mA (ignition off), 150mA (ignition on)
  • Operating Current: 9.25A (@ 13.6V with 11-ohm load, amplifier in wail)
  • Operating Temperature Range: -30° C to +65° C
  • Output: 64V peak-to-peak
  • Total Current Rating for Relay: 80A Combined Total – all relays
  • Slide Switch Outputs: Mode 1 (30A), Mode 2 (30A) and Mode 3 (30A), (40A combined total)
  • Push-button Switch Outputs: 20A each
  • Dim. (W x L x D): 6.8 in x 3.0 in x 7.8 in (17.3 cm x 7.6 cm x 19.7 cm)
  • Shipping Weight: 6 lb

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