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Table V. Transient suppression, internal relays.
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Printed Circuit Cards, M1 and M1A1 Tank Turret Network Box, TNB-A4
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Internal relays



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MIL-P-62341/3A
3.5.8 Time delay and latching circuit. Not applicable
Not applicable.
3.5.9 Fire warning circuit.
4.8 Methods of inspection.
4.8.3 Weight.  Conformance to 3.4.2 shall be determined by weighing the
PCC (TNB-A4) on a scale.
4.8.4.3 Circuit isolation.  To determine conformance to 3.5.2, the PCC
shall be tested in accordance with MIL-STD-202, method 302, test condition A.
Connect the terminals listed in table I for each circuit number and measure
the circuit resistance from each circuit to all of the remaining circuits.
4.8.4.4 Diode I/V characteristics.
4.8.4.4.1 Forward voltage drop.  To determine conformance to 3.5.3.1,
the forward voltage drop of the diodes specified in table II shall be
measured in accordance with MIL-STD-750, method 4011.4. When energization of
a relay is required, the relay associated with the diode by applying 24 2 V
dc between the relay terminals specified in table II using a second power
source whose power return terminal is electrically isolated from the primary
power source used for testing the diodes.
4.8,4.4.2 Reverse leakage current.  To determine conformance to 3.5.3.2,
the reverse leakage current of the diodes specified in table II shall be
measured in accordance with MIL-STD-750, method 4016.3. When energization of
relay is required, energize the relay associated with the diode by applying
24 2 V dc between the relay terminals specified in table II using a second
power source whose power return terminal is electrically isolated from the
primary power source used for testing the diodes.
4.8.4.5 Blocking diode.
Not applicable.
4.8.4.6 Resistors.
Not applicable.
4.8.4.7 Relay operation.  TO determine conformance to 3.5.6, connect the
positive terminal of a power source set to 18.0 (+0.5, -0.0) V dc to each of
the relay contact positive terminals of the relay under test in tables III
and IV.  Connect a 560 56 ohm, 2 watt minimum resistor between the relay
contact return terminal(s) and the return terminal of the power source.
Connect a second power source, whose power return terminal is electrically
isolated from the previous power source, between each of the relay coil
terminals of tables III and IV and (when required) between any additional
terminals of tables II and III that require 18 to 30 V dc.  With power
applied, the voltage drop across each of the resistors shall be measured to
conform to 3.5.6, table III and IV.  The relays shall de-energized by
removing the voltage from the relay coil positive terminal and the Voltage
drop across the resistors shall be measured to conform to 3.5.6, table III
and IV.  Tests on the relays of table IV must be performed in step sequence
shown.  The entire test shall be repeated except the power source voltagers
shall be set to 30 (+0.0, -0.5) V dc.
7

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