©
National Instruments Corporation
5
LFH200 Cable Installation Instructions
Cable Configurations
The LFH200 cable is available in three configurations:
•
SH200LFH-4xDB50F-C
•
SH200LFH-4xDB50F-S
•
SH200LFH-BARE WIRE
The following sections describe each of the LFH200 cable configurations.
SH200LFH-4xDB50F-C Cable
The SH200LFH-4xDB50F-C cable is recommended for connecting the PXI-2569/2570/2571 or
SCXI-1169 to your system. One end of the cable terminates with an LFH200 connector which
connects to the switch module. The other end of the cable terminates with four 50-pin female
D-SUB connectors.
When using the SH200LFH-4xDB50F-C cable with the PXI-2569 or SCXI-1169, each Channel
and its corresponding Common form a twisted pair. For example, CH0 is paired with COM0,
and CH1 is paired with COM1. Figure 5 illustrates how this pairing relates to the pins on the
PXI-2569 or SCXI-1169.
Figure 5.
Twisted Pair Groupings for the PXI-2569 or SCXI-1169
When using the SH200LFH-4xDB50F-C cable with the PXI-2570, each Channel and its
corresponding NO (Normally Open) connection form a twisted pair. The NC (Normally Closed)
connection is twisted with NO CONNECT wires. For example, COM0 is twisted with NO0, and
NC0 is twisted with a NO CONNECT wire. Figure 6 illustrates how this pairing relates to the
pins on the PXI-2570.
COM0
COM2
COM4
COM6
COM8
150
151
149
152
148
153
147
154
146
155
51
50
52
49
53
48
54
47
55
46
CH0
CH2
CH4
CH6
CH8
CH1
CH3
CH5
CH7
CH9
COM1
COM3
COM5
COM7
COM9
