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參數(shù)資料
| 型號(hào)： | BU-65171V6-110 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CDFP70 |
| 封裝： | 1.900 X 1 INCH, 0.150 INCH HEIGHT, LOW PROFILE, CERAMIC, FP-70 |
| 文件頁(yè)數(shù)： | 27/44頁(yè) |
| 文件大?。?/td> | 298K |
| 代理商： | BU-65171V6-110 |
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33
INTERFACE TO MIL-STD-1553 BUS
FIGURE 18 illustrates the interface from the various versions of
the ACE series terminals to a 1553 bus. The figure also indicates
connections for both direct (short stub) and transformer (long
stub) coupling, plus the peak-to-peak voltage levels that appear
at various points (when transmitting).
TABLE 35 lists the characteristics of the required isolation trans-
formers for the various ACE terminals, the DDC and Beta
Transformer Technology Corporation corresponding part num-
ber, and the MIL (DESC) drawing number (if applicable). Beta
Transformer Technology is a direct subsidiary of DDC.
For both coupling configurations, the isolation transformer is the
transformer that interfaces directly to the ACE component. For
the transformer (long stub) coupling configuration, the trans-
former that interfaces the stub to the bus is the coupling trans-
former. The turns ratio of the isolation transformer varies,
depending upon the peak-to-peak output voltage of the specific
ACE terminal.
The transmitter voltage of each model of the BU-65170/61580
varies directly as a function of the power supply voltage. The
turns ratios of the respective transformers will yield a secondary
voltage of approximately 28 volts peak-to-peak on the outer taps
(used for direct coupling) and 20 volts peak-to-peak on the inner
taps (used for stub coupling).
In accordance with MIL-STD-1553B, the turns ratio of the cou-
pling transformer is 1.0 to 1.4. Both coupling configurations
require an isolation resistor to be in series with each leg con-
necting to the 1553 bus; this protects the bus against short cir-
cuit conditions in the transformers, stubs, or terminal compo-
nents.
Notes for TABLE 35 and FIGURE 18:
(1) Shown for one of two redundant buses that interface to the BU-65170 or BU-
61580.
(2) Transmitted voltage level on 1553 bus is 6 Vp-p min, 7 Vp-p nominal, 9 Vp-p
max.
(3) Required tolerance on isolation resistors is 2%. Instantaneous power dissipa-
tion (when transmitting) is approximately 0.5 W (typ), 0.8 W (max).
(4) Transformer pin numbering is correct for the DDC (e.g., BUS-25679) trans-
formers. For the Beta transformers (e.g., B-2203) or the QPL-21038-31 transform-
ers (e.g., M21038/27-02), the winding sense and turns ratio are mechanically the
same, but with reversed pin numbering; therefore, it is necessary to reverse pins
8 and 4 or pins 7 and 5 for the Beta or QPL transformers (Note: DDC transformer
part numbers begin with a BUS- prefix, while Beta transformer part numbers
begin with a B- prefix).
(5)The B-2204, B-2388, and B-2344 transformers have a slightly different turns
ratio on the direct coupled taps then the turns ratio of the BUS-29854 direct cou-
pled taps. They do, however, have the same transformer coupled ratio. For trans-
former coupled applications, either transformer may be used. The transcevier in
the BU-65170X2 and the BU-61580X2 was designed to work with a 1:0.83 ratio
for direct coupled applictions. For direct coupled applications, the 1.20:1 turns
ration is recommended, but the 1.25:1 may be used. The 1.25:1 turns ratio will
result in a slightly lower transmitter amplitude. (Approximateley 3.6% lower) and a
slight shift in the ACE's receiver threshold.
TABLE 35. ISOLATION TRANSFORMER GUIDE
RECOMMENDED XFORMER
TURNS RATIO
ACE PART
NUMBER
SURFACE
MOUNT
PLUG-IN
XFORMER
COUPLED
DIRECT
COUPLED
BUS-25679,
B-2203,
M21038/27
-03
2:1
1.41:1
LPB-5001
LPB-5008
LPB-6001
LPB-6008
BUS-29854
B-2204,
M21038/27
-03
1:0.6
1.20:1
1.25:1
(Note 5)
B-3227
( supersedes
B-3072 )
B-3226
( supersedes
B-3067 )
1:1.79
1:2.5
BU-65170X1
BU-65171X1
BU-61580X1
BU-61581X1
BU-61585X1
BU-61586X1
BU-65170X3
BU-65171X3
BU-61580X3
BU-61581X3
BU-61585X3
BU-61586X3
BU-65170X6
BU-65171X6
BU-61580X6
BU-61581X6
BU-61585X6
BU-61586X6
BU-65170X2
BU-65171X2
BU-61580X2
BU-61581X2
BU-61585X2
BU-61586X2
B-2387
M21038/27
-12,
M21038/27
-17
LPB-5002
LPB-5009
LPB-6002
LPB-6009
B-2388
M21038/27
-13,
B-2334,
M21038/27
-18
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