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Mil-Spec
Indicators
Rear and Front Mount
Qualified to MIL-PRF-83287/2
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The M83287/2 magnetic latching fault indicator
displays a highly visible dual color internal flag when
the indicator coil is pulsed by a BITE (Built-in Test
Equipment) system. The "cloverleaf" pattern provides
a high contrast visual identification and an effective
warning of system results.
Covered by U.S. and
Foreign Patents.
Cleared by DOD/OFOISR for public release
under 00-S-1235 dated April 17, 2000.
Short
case model MI 57DA available for non-military applications.
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Electrical Reset |
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Magnetic Latching |
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Positive Identification |
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Environmentally Sealed |
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OPERATION
When the indicator coil is energized with a 40 millisecond
(or longer) pulse, the highly visible display disc rotates
and latches to the magnetic core. The display disc will
remain magnetically latched to the core in the position
last pulsed. Even if the fault signal is removed, the
indicator will "remember" that a fault had occurred.
Return to the "No-Fault" position
is accomplished electromechanically by pulsing a separate
coil.
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| See MIL-PRF-83287
for values. Also shown in table
below.
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Pulse Power: One watt, nominal |
| Pulse
Length: 40 milliseconds, minimum. |
| Dielectric
Withstanding Voltage: 500 VAC RMS |
| Insulation
Resistance: 100 megohms min. at 500 VDC
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| Electromagnetic
Interference and Magnetic Susceptibility:
Per MIL-PRF-83287. The units will not malfunction
of false transfer when subjected to a 20 ampere
turn field at 400 Hertz. |
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| Case:
Black, anodized aluminum |
| Mounting:
Front panel mount (D-hole or keyed washer). |
| Weight:
MIL Unit 20 grams |
| Display
Colors: "NO FAULT" is black, "FAULT" is black/
white, as shown. |
Leads:
WL - Eight inches of #26 AWG Teflon
insulated wire
LT
- Loop terminals |
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| Operating
Temperature Range: -65°C to +125°C. |
| Vibrational: |
Sinusoidal:
.06" D.A. or 20 G Peak, which ever is less, 10 Hz
to 2 KHz per
MIL
STD 202, Method 204, Test Condition D. |
| Random:
11.6 G's per MIL STD 202, Method 214, Test Condition
D, Curve 1. |
| Shock:
100 G's per MIL STD 202, Method 213, Test Condition
I. |
| Moisture Resistance:
(Humidity): MIL STD 202, Method 106. |
| Thermal Shock:
MIL STD 202, Method 107, Test Condition B. |
| Salt Spray:
MIL STD 202, Method 101, Test Condition B. |
| Barometric
Pressure: MIL STD 202, Method 105, Test Condition
D, with 350 Volts RMS. *During vibration testing,
caution should be taken to shield the indicator
from the strong magnetic field. |
| Life:
100,000 cycles at cycling rate of 10 per minute.
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| Optional:
RFI panel shielding available. |
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When
ordering military spec product, use the basic MIL number
followed by MIL dash number.
Example:
M83287/2-01
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Basic
Part
Number
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Standard
Glass
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Non-Glare
Glass
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Rated
Voltage
DC
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Coil
Resistance
OHMS
Ambient
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Config-
uration
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Wire
Leads
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Loop Terminals
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Wire
Leads
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Loop Terminals
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Diodes
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Diodes
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Diodes
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Diodes
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W/Out
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With
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W/Out
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With
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W/Out
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With
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W/Out
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With
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Dash
Number
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Dash
Number
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Min
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Max
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M83287/2
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-01
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-02
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-03
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-04
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-05
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-06
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-07
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-08
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28
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675
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880
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A
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M83287/2
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-09
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-10
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-11
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-12
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-13
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-14
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-15
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-16
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28*
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360
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500
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A
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M83287/2
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-17
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-18
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-19
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-20
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28
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375
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850
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A
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M83287/2
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-21
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-22
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-23
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-24
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28
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675
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880
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B
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M83287/2
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-25
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-26
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-27
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-28
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28*
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360
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500
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B
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M83287/2
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-29
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-30
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-31
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-32
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-33
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-34
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-35
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-36
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12
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130
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230
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A
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M83287/2
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-37
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-38
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-39
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-40
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12
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130
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230
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B
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M83287/2
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-41
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-42
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-43
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-44
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-45
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-46
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-47
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-48
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5
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19
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35
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A
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M83287/2
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-51
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-52
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-49
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-50
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5
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19
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35
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B
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*For use with unregulated power supply (MIL-STD-704)
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Note: Dim. in ( ) are mm. Tolerances:
Decimals: ± .010 (0,25), Fractions:± 1/64 —
All mounting hardware is black anodized aluminum. Mounting
Torque: 5-7 in. lbs
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