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Data Device Corporation
www.ddc-web.com
BU-65170/61580/61585
H1 web-09/02-0
Note: The BU-65170XX, BU-65171XX, BU-61581XX, BU-61585XX and BU-61586XX models are interfaced the same as the corresponding BU-61580XX model is shown
(i.e. The BU-65170X1 is interfaced the same as the BU-61580X1).
FIGURE 18. BU-65170/61580 INTERFACE TO A 1553 BUS
BU-61580X1
55
1
2
3
8
4
1.4:1
39 VPP
28 VPP
1 FT MAX
1
2
3
7
5
2:1
20 VPP
1
8
3
1:1.4
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
DIRECT COUPLED (SHORT STUB)
OR
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
DIRECT COUPLED (SHORT STUB)
BU-61580X2
1
2
3
8
4
1:0.83
28 VPP
1 FT MAX
1
2
3
7
5
1:0.6
33 VPP
20 VPP
1
8
3
4
1:1.4
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
OR
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
DIRECT COUPLED (SHORT STUB)
BU-61580X3
BU-61580X6
1
2
3
8
4
1:2.5
11.6 VPP
28 VPP
1
2
3
7
5
1:1.79
11.6 VPP
20 VPP
1
8
3
4
1:1.4
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
OR
55
Z0 (70 to 85)
39 VPP
4
0.75 Z0
33 VPP
55
55
55
55
Z0 (70 to 85)
0.75 Z0
1 FT MAX