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BEU8638-12 Datasheet(PDF) 5 Page - Aeroflex Circuit Technology

Part # BEU8638-12
Description  Independent Balancing for Two 12-Cell Batteries Cell Voltage Monitoring and Telemetry Cell Bypass Relay Drivers
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Manufacturer  AEROFLEX [Aeroflex Circuit Technology]
Direct Link  http://www.aeroflex.com
Logo AEROFLEX - Aeroflex Circuit Technology

BEU8638-12 Datasheet(HTML) 5 Page - Aeroflex Circuit Technology

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SCD8638 Rev D 3/21/08
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5
32-Word Telemetry
To reduce data bus bandwidth usage, the 8638-12 supports
a 32-word telemetry request on sub-address 20 as defined
in Table III.
First a 1553B receive command with one data word of
AAAA(Hex) must be issued.
After a minimum delay of
1.2ms, the data can be retrieved by sending a 1553B
transmit command for 32 data words on sub-address 20.
Reply word 31 is a modulo-16 message count. This counter
increments by one for each valid telemetry request.
The 12-bit analog data reply is left justified in the 16-bit
1553B data word with the four LSBs set to "0"..
8-Word Telemetry
To reduce data bus bandwidth usage, the 8638-12 supports
an 8-word telemetry request on sub-address 24 as defined
in Table IV.
First a 1553B receive command with one data word of
5555(Hex) must be issued. After a minimum delay of 1.2ms,
the data can be retrieved by sending a 1553B transmit
command for 8 data words on sub-address 24.
Reply word 8 is a modulo-16 message count. This counter
increments by one for each valid telemetry request.
The 12-bit analog data reply is left justified in the 16-bit
1553B data word with the four LSBs set to "0".
Table III – 32-Word Telemetry
Item
Telemetry Title
Telemetry
Type
Reply
Word
Reply Bits
1
4V Reference
Analog
1
D(15:4)
2
Total Battery Voltage 1
Analog
2
D(15:4)
3
Total Battery Voltage 2
Analog
3
D(15:4)
4
Total Battery Voltage 3
Analog
4
D(15:4)
5
Share Bus Voltage
Analog
5
D(15:4)
6
Master Bypass Power Status
Analog
6
D(15:4)
7
Cell 1 Voltage
Analog
7
D(15:4)
8
Cell 2 Voltage
Analog
8
D(15:4)
9
Cell 3 Voltage
Analog
9
D(15:4)
10
Cell 4 Voltage
Analog
10
D(15:4)
11
Cell 5 Voltage
Analog
11
D(15:4)
12
Cell 6 Voltage
Analog
12
D(15:4)
13
Cell 7 Voltage
Analog
13
D(15:4)
14
Cell 8 Voltage
Analog
14
D(15:4)
15
Cell 9 Voltage
Analog
15
D(15:4)
16
Cell 10 Voltage
Analog
16
D(15:4)
17
Cell 11 Voltage
Analog
17
D(15:4)
18
Cell 12 Voltage
Analog
18
D(15:4)
19
Cell 13 Voltage
Analog
19
D(15:4)
20
Cell 14 Voltage
Analog
20
D(15:4)
21
Cell 15 Voltage
Analog
21
D(15:4)
22
Cell 16 Voltage
Analog
22
D(15:4)
23
Cell 17 Voltage
Analog
23
D(15:4)
24
Cell 18 Voltage
Analog
24
D(15:4)
25
Cell 19 Voltage
Analog
25
D(15:4)
26
Cell 20 Voltage
Analog
26
D(15:4)
27
Cell 21 Voltage
Analog
27
D(15:4)
28
Cell 22 Voltage
Analog
28
D(15:4)
29
Cell 23 Voltage
Analog
29
D(15:4)
30
Cell 24 Voltage
Analog
30
D(15:4)
31
Message Count
Analog
31
D(15:0)
32
Overvoltage Latch Status
Bi-level
32
D13
1/ For Battery A.
2/ For Battery B.
1/
2/
Table IV – 8-Word Telemetry
Item
Telemetry Title
Telemetry
Type
Reply
Word
Reply Bits
1
Overvoltage Latch Status
Bi-level
1
D13
2
Bypass Dev. 1 Arm Status
Bi-level
2
D15
3
Bypass Dev. 2 Arm Status
Bi-level
2
D14
4
Bypass Dev. 3 Arm Status
Bi-level
2
D13
5
Bypass Dev. 4 Arm Status
Bi-level
2
D12
6
Bypass Dev. 5 Arm Status
Bi-level
2
D11
7
Bypass Dev. 6 Arm Status
Bi-level
2
D10
8
Bypass Dev. 7 Arm Status
Bi-level
2
D9
9
Bypass Dev. 8 Arm Status
Bi-level
2
D8
10
Bypass Dev. 9 Arm Status
Bi-level
3
D15
11
Bypass Dev. 10 Arm Status
Bi-level
3
D14
12
Bypass Dev. 11 Arm Status
Bi-level
3
D13
13
Bypass Dev. 12 Arm Status
Bi-level
3
D12
14
Bypass Dev. 13 Arm Status
Bi-level
3
D11
15
Bypass Dev. 14 Arm Status
Bi-level
3
D10
16
Bypass Dev. 15 Arm Status
Bi-level
3
D9
17
Bypass Dev. 16 Arm Status
Bi-level
3
D8
18
Bypass Dev. 17 Arm Status
Bi-level
4
D15
19
Bypass Dev. 18 Arm Status
Bi-level
4
D14
20
Bypass Dev. 19 Arm Status
Bi-level
4
D13
21
Bypass Dev. 20 Arm Status
Bi-level
4
D12
22
Bypass Dev. 21 Arm Status
Bi-level
4
D11
23
Bypass Dev. 22 Arm Status
Bi-level
4
D10
24
Bypass Dev. 23 Arm Status
Bi-level
4
D9
25
Bypass Dev. 24 Arm Status
Bi-level
4
D8
26
0V Reference
Analog
5
D(15:4)
27
Lowest Cell Voltage
Analog
6
D(15:4)
28
Highest Cell Voltage
Analog
7
D(15:4)
29
Message Count
Analog
8
D(15:0)
1/ For Battery A.
2/ For Battery B.
1/
2/


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