National Instruments NI PXI-6541 - NI 6555;6556 Front Panels and Connectors

NI Digital Waveform Generator/Analyzer Getting Started Guide | © National Instruments | 27
NI 6555/6556 Front Panels and Connectors
The NI 6555/6556 front panels contain six connectors—three SMA connectors named CLK IN,
PFI 0, and CLK OUT, two 68-pin VHDCI connectors named DIGITAL DATA & CONTROL
(DDC) and REMOTE SENSE, and a COMBICON connector named AUX I/O.
Note The NI 6555 does not have the AUX I/O connector.
Figure 16 shows the pinouts of the NI 6556 VHDCI connectors, which are identical to the
pinouts of the NI 6555 VHDCI connectors. The DDC signals are described in Table 3. The
REMOTE SENSE signals are described in Table 4. The NI 6556 AUX I/O signals are described
in Table 5. The SMA connectors are described in Table 7. The LEDs are described in
Tables 8 and 9.
Figure 16. NI 6556 Front Panel Connectors
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46
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48
49
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51
52
53
54
55
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58
59
60
61
62
63
64
65
66
67
68
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
PFI 31
GND
PFI 29
GND
PFI 27
GND
PFI 25
GND
DIO 23
GND
DIO 21
GND
DIO 19
GND
DIO 17
GND
DIO 15
GND
DIO 13
GND
DIO 11
GND
DIO 9
GND
DIO 7
PFI 1
DIO 5
GND
DIO 3
PFI 3
DIO 1
GND
PFI 4 / DDC CLK OUT
GND
PFI 30
GND
PFI 28
GND
PFI 26
GND
PFI 24
GND
DIO 22
GND
DIO 20
GND
DIO 18
GND
DIO 16
GND
DIO 14
GND
DIO 12
GND
DIO 10
GND
DIO 8
GND
DIO 6
RESERV
DIO 4
GND
DIO 2
PFI 2
DIO 0
GND
PFI 5 / S
GND
GND
FI 5 SENSE
GND
O 0 SENSE
FI 2 SENSE
O 2 SENSE
GND
O 4 SENSE
CAL GND
O 6 SENSE
GND
O 8
SENSE
GND
O 10 SENSE
GND
O 12 SENSE
GND
O 14 SENSE
GND
O 16 SENSE
GND
O 18 SENSE
GND
O 20 SENSE
GND
O 22 SENSE
GND
NC
GND
NC
GND
NAL FORCE
GND
NAL SENSE
GND
PFI 4 SENSE
GND
DIO 1 SENSE
NC
DIO 3 SENSE
GND
DIO 5 SENSE
PFI 1 SENSE
DIO 7 SENSE
GND
DIO 9 SENSE
GND
DIO 11 SEN
SE
GND
DIO 13 SENSE
GND
DIO 15 SENSE
GND
DIO 17 SENSE
GND
DIO 19 SENSE
GND
DIO 21 SENSE
GND
DIO 23 SENSE
GND
NC
GND
NC
GND
NC
GND
CAL DMM
EXT
FORCE
GUARD
EXT
SENSE
GUARD
–3 to 8.5V
MAX to
CAL
ACCESS
ACTIVE
NI PXIe-6556
200 MHz Digital I/O with PPMU
PFI 0
CLK
IN
CLK
OUT
REMOTE SENSE
DIGITAL DATA & CONTROL
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15
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12
11
10
9
8
7
6
5
4
3
2
1
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
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48
47
46
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AUX I/O