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BITE
Indicators
Latching or Self-Restoring
Model MI 61 Series
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The MI 61 series magnetic latching fault
indicator displays a highly visible dual color drum
when the indicator coil is pulsed by a BITE (Built-In
Test Equipment) system. The drum provides a high contrast
visual indication and an effective warning of system
faults. The drum can accommodate a legend such as "GO"
or "FAIL" when specific information needs to be displayed.
Covered by U.S.
and Foreign Patents.
Cleared by DOD/OFOISR for public release under 00-S-1235
dated April 17, 2000.
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Choice of Self-restoring or
Magnetic Latching Types |
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Optional Legend Display |
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Magnetic Latching |
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Environmentally Sealed
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OPERATION
When the indicator coil is energized with a 50 millisecond
or longer pulse, the drum rotates to display the message
or system status.
Model Ml 61M is a self-restoring,
steady state indicator that automatically returns to
a neutral state when power is removed. It does not latch
to the core magnet, but remains suspended in the position
until power is removed.
Model MI 61L & D are latching indicators
that remain magnetically latched to the core in the
position last pulsed.
For Model MI 61L reset to the
"no-fault" position is accomplished electrically by
reversing the polarity of the pulse.
For Model MI 61LD reset to the
"no-fault" position is accomplished electronically
by pulsing a separate coil.
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Standard
Coil Voltages and Resistances
Resistance in Ohms, ±10% @ 25°C
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| DC Voltage |
3 |
5 |
6 |
12
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24 |
28 |
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Resistance (Ohms)
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6 |
20 |
24 |
103 |
385 |
520 |
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Pulse Power: Steady state for model MI
61 1.5 watts. |
| Pulse
Power for Latching Models: 1.5 watts,
minimal. |
| Pulse
Length for Latching Models: 50 ms min. |
Dielectric
Withstanding Voltage: 500 volts DC case-to-terminals.
100
VDC coil-to-coil on dual coil units. |
Insulation
Resistance: 100 megohms at rated dielectric
withstanding voltages.
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| Case:
Black, anodized aluminum with sealed glass window.
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| Mounting:
Front panel mount. |
| Weight:
20 grams maximum |
Display
Colors: Any combination of: Black (Blk), White
(W), and Day Glow* colors: Red (R), Orange (O),
Yellow (Y), and Green (G).
*DayGlow
Color Corp. |
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Legend: Available maximum letter height
1/8".
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| Hardware:
Units supplied with hex nut. |
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| Operating
Temperature Range: -65°C to +125°C. |
| Vibration**:
0 G's, 10 to 2KHz, MIL STD 202. |
| Shock:
50 G's MIL STD 202, Method 213, Condition I. |
| Humidity:
95% relative humidity MIL STD 202, Method 103, Test
Condition B. |
| Barometric
Pressure: 100,000 ft., MIL STD 202, Method 105,
Test Condition D. |
| Thermal Shock:
MIL STD 202, Method 107, Test Condition A. |
| Salt Spray:
MIL STD 202, Method 101, Test Condition B. |
| Operational
Life: 10,000 cycles |
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**During vibration testing, caution should
be taken to shield the indicator from the strong
magnetic field.
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When
ordering, show model number first, then coil voltage
desired, then the color combination desired. If this
is a special part, factory modification number will
be added at the end of the ordering number.
Example:
Dual coil magnetically latching
unit for 24 volts with black for the fault color and
red for reset color would be: Model MI 61LD-24-Blk/R
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MI
61LD - 24 - Blk
/ R - S
Basic
Model
Number |
Coil
Voltage |
Fault
or Set
Color |
No fault
Color |
Factory
Modification
Number if Special |
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MI
61M
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3
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R
Red*
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R
Red*
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S.+
ID No.
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MI
61L
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5
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W
White
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W
White
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MI
61LD
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6
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BLK
Black
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BLK
Black
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12
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G Green*
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G
Green*
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24
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Y
Yellow*
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Y
Yellow *
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28
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O
Orange*
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O
Orange*
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*DayGlow
Color Corp. |
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.
| This
PDF contains a printable version of the hard copy
catalog page. |
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L-3-EDI
MI 61.pdf |
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Note: Viewing and printing PDF files requires the
free Adobe Acrobat Reader program. You can download
Acrobat Reader from Adobe's
web site. |
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