LFH200 Cable Installation Instructions
6
ni.com
Figure 6.
Twisted Pair Groupings for the PXI-2570
When using the SH200LFH-4xDB50F-C cable with the PXI-2571 the twisted pairs vary
depending on the channel. For the first 50 Channels, each COM and its corresponding NO
connection form a twisted pair. However, for the remaining 16 channels, the three components
(NC, COM, and NO) are each twisted with a NC component from the first 50 Channels. For
example, COM0 is twisted with NO0, and NC0 is twisted with NC50. COM1 is twisted with
NO1, and NC1 is twisted with COM50. COM2 is twisted with NO2, and NC2 is twisted with
NO50. Figure 7 illustrates how this pairing relates to the pins on the PXI-2571.
Figure 7.
Twisted Pair Groupings for the PXI-2571
Refer to the
NI Switches Help
for a complete listing of channel names and pinouts.
The following tables list the pin assignments for the SH200LFH-4xDB50F-C cable.
NC0
NC1
NO CONNECT
NC2
NC
3
NC4
150
151
149
152
14
8
15
3
147
154
146
155
51
50
52
49
5
3
4
8
54
47
55
46
COM0
COM1
COM2
COM
3
COM4
NO0
NO1
NO2
NO
3
NO4
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NC0
NC1
NC2
NC
3
NC4
150
151
149
152
14
8
15
3
147
154
146
155
51
50
52
49
5
3
4
8
54
47
55
46
NC50
COM50
NO50
NC51
COM51
COM0
COM1
COM2
COM
3
COM4
NO0
NO1
NO2
NO
3
NO4
