Racal Instruments 1260 VXI, Руководство пользователя

Страница: 22 / 63

1260-145 User Manual
Module Specification 1-12 Racal Instruments

2003
Mechanical
Specifications –
1260-145D
Shock 30g, 11 ms, ½ sine wave
Vibration 0.013 in. P-P, 5-55 Hz
Bench Handling 4 in., 45
°
Cooling See 1260-100 cooling data
Temperature
Operating
0
°
C to +55
°
C
Non-operating -40
°
C to +75
°
C
Relative Humidity 85% + 5% non-condensing at
< 30
°
C
Altitude
Operating
10,000 feet
Non-operating 15,000 feet
Weight 9 oz. (0.32 kg.)
Power
Dissipation –
1260-145D The cooling of the Adapt-a-Switch carrier is dependent upon the
chassis into which it is installed. The carrier can nominally
dissipate approximately 100W. Even with all channels driven to
maximum outputs, up to six 1260-145D plug-ins may be used
together in a 1260-100 without exceeding the maximum allowable
power dissipation of the carrier.
If the 1260-145D will be used in conjunction with other cards, the
dissipation should be computed and summed with the total worst-
case dissipation of the remaining modules.
For example, a 1260-145D module would dissipate the following
energy:
Quiescent power dissipation = 0.5W maximum
Channel dissipation =
[(# channels energized) * (relay coil dissipation)]
Total Power Dissipation = Qui Channel
Assuming all relays on the card are enabled (worse-case situation)
the channel path resistances will be in parallel and therefore
insignificant as a source of heat. The largest contributor of thermal
energy will therefore derive from the relay coils.
Total power dissipation = [(144) * (0.100)] + [0.5] = 15W
This is acceptable power dissipation for an individual plug-in