Davtron M877 Quick Start Manual

MECHANICAL
2.375
TYP.
1.875
TYP.
2.22
3
Mounting Hardware 4-40x /
8
ELECTRICAL
Alarm Out
Keep Alive .00004A
5
Ground to start Flight Time
9
4
Dimming 28V at 50MA, 5v or 14V available
8
4V to 28V Starts Flight Time
3
7
Serial Data Output/optional
2
6 14 to 28 Volts, 2A
1
Serial Clock Output/optional
GND
NOTE: Keep Alive (Pin 9) is only required if alkaline AA size battery is removed. Flight Time starts with either
Pin 3 or Pin 4 – use only one pin.
SPECIFICATIONS
Greenwich Mean Time: 24 hour format.

Local Time: 12 hour or 24 hour format.

 Flight Time: Records in 99:59 standard,
99.99 hour option.
 Flight Time Alarm: Full set range flight time.
 Elapsed Time Count Up: Starts in minutes,
seconds, then hours, minutes up to 99:59 hrs.
Elapsed Time Count Down: Settable from

one second to 59 minutes, 59 seconds.
 Elapsed Time Alarm: Activates at zero
when counting down.
2.10
1.375
Alkaline "AA" Battery
M877
Locking Connector
Positronics MD9F-20J-VL
1.675
.080 2.83
Audio Alarm
(Optional)
14V - 28V
- +
+
Battery
.25A
Incandescent Displays Readable in sunlight.

 Automatic Dimming
Battery Type: AA size alkaline.

 Polarizing Filter
Keep Alive Current: .00004 Amps.

 Input Current: .2 Amps.
 Input Voltage: 14V - 28V
Backlight available 5V, 14V or 28V lighting.
(Specify when ordering)
Crystal Reference: -40C to + 60C .001%.

 Weight: 5 ounces.
Warranty: 1 year.

427 HILLCREST WAY
REDWOOD CITY (Emerald Hills) CA 94062
(650) 369-1188
www.davtron.com
DIGITAL CLOCK
GREENWICH MEAN TIME
LOCAL TIME
FLIGHT TIME - Flight Time Alarm
ELAPSED TIME - Count Up, Count Down, Alarm
FEATURES
 Two button control system is natural and error
free. Setting operations are identical for both
alarm and time setting. Patent Pending.
 Bright sunlight readable incandescent displays.
 Illuminated buttons and annunciators for
night viewing.
 Flight Time recorded in hours and minutes or in
hours, tenths, and hundredths.
M877
Incandescent Display
 Serial time data output for remote use.
 Flight time alarm with external output.

Elapsed time count down timer with alarm.
 Temperature - Compensated crystal oscillator
to maintain precision time reference.