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Whelen 10 digit DTMF activation protocol is fast, secure and reliable.
Selection of 18 activation commands.
Selection of 1-10 sirens individually.
System "All Call".
Inclined keyboard for easy access and viewing.
Membrane keypad features raised keys with tactile response.
LED indicators illuminate upon key selection.
Command key LED flashes when activation has been sent.
Keyboard on/off switch and LED indicator.
Microphone input and microphone level adjustment.
May be used for mobile applications.
SPECIFICATION DATA
E-747: 18 function encoder permitting individual selection of 1-10 warning sirens or system "all call". Compact desktop design with inclined sealed membrane keyboard. LED key select indicators illuminate upon key selection. Command key LED flashes upon transmission of activation sequence. 12VDC nominal operation, furnished with U.L. listed wall mount transformer. May be used for mobile applications.
PHYSICAL DATA
Height: 2.1"
Width: 6.9"
Depth: 6.7" (including mic plug)
Weight: 1.1 lb.
ELECTRICAL DATA
INPUTS
Power: 12VDC, nominal. The E-747 is furnished with a UL listed 240/120VAC / 12VDC wall mount transformer.
Current: 60 mA 12VDC typical, 150 mA maximum.
Microphone: Ground, Signal, PTT.
Outputs: 4 wire cable, Audio - 2 wires, PTT - 2 wires.
Audio: 2 wire, 600 ohm transformer balanced, output adjustable 0-2vpp.
Control: 2 wire, transmitter PTT.
SIGNALLING
1 N.O. relay contact. Contact Rating: ½a @ 120VAC, 1a @ 12VDC.
DTMF 2 of 8 format, Whelen 10 digit protocol.
REAR PANEL CONTROLS
Transmitter Warmup: 4 selections: 100ms, 500ms, 1 sec. & 2 sec.
DTMF Tone Level: Variable, 0-4vpp.
Microphone Level: Variable, 0-6vpp.
ENVIRONMENTAL DATA
Operating Temperature: -20C to +60C.
Storage Temperature: -40C to +60C.
Humidity: 0-90% non-condensing. |
