National Instruments LFH200 User manual

INSTALLATION INSTRUCTIONS
LFH200 Cable
This guide describes how to use the National Instruments LFH200 cable to connect the
NI PXI-2569/2570/2571/2575 or SCXI-1169/1175 switch module to your system.
The LFH200 cable is available in three configurations:
• SH200LFH-4xDB50F-C—Recommended for use with the PXI-2569/2570/2571 or
SCXI-1169.
• SH200LFH-4xDB50F-S—Recommended for use with the PXI-2575 or SCXI-1175.
• SH200LFH-BARE WIRE—Recommended for termination other than 50-pin female
D-SUB.
Caution The LFH200 cable has a maximum voltage rating of 60 VDC. When using
the LFH200 cable with switch modules, do not exceed 60 VDC.
Contents
Conventions .............................................................................................................................. 2
Getting Started .......................................................................................................................... 2
Connecting the LFH200 Cable ................................................................................................. 2
Connectors ........................................................................................................................ 4
Cable Configurations ................................................................................................................ 5
SH200LFH-4xDB50F-C Cable ........................................................................................ 5
SH200LFH-4xDB50F-S Cable......................................................................................... 15
SH200LFH-BARE WIRE Cable ...................................................................................... 24
Accessories ............................................................................................................................... 33
Specifications............................................................................................................................ 34
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LFH200 Cable Installation Instructions 2ni.com
Conventions
The following conventions are used in this guide:
»The »symbol leads you through nested menu items and dialog box
options to a final action. The sequence Options»Settings»General
directs you to pull down the Options menu, select the Settings item,
and select General from the last dialog box.
This icon denotes a note, which alerts you to important information.
This icon denotes a caution, which advises you of precautions to take
to avoid injury, data loss, or a system crash.
bold Bold text denotes items that you must select or click in the software,
such as menu items and dialog box options. Bold text also denotes
parameter names.
italic Italic text denotes variables, emphasis, a cross-reference, or an
introduction to a key concept. Italic text also denotes text that is a
placeholder for a word or value that you must supply.
monospace Text in this font denotes text or characters that you should enter from
the keyboard, sections of code, programming examples, and syntax
examples. This font is also used for the proper names of disk drives,
paths, directories, programs, subprograms, subroutines, device names,
functions, operations, variables, filenames, and extensions.
Getting Started
The following items are necessary for connecting the LFH200 cable:
❑LFH200 cable
❑NI PXI-2569/2570/2571/2575 or SCXI-1169/1175 switch module and documentation
Connecting the LFH200 Cable
Complete the following steps to connect the LFH200 cable to your switch module and
application. Refer to Figures 1 and 2 for illustrations of the LFH200 cable.
1. Connect the LFH200 connector to the connector on the switch module.
2. Tighten the thumbscrews.
3. Complete either of the following steps, and refer to Tables 1 through 16 to determine how
to connect your signals.
• Connect the D-SUB connectors to your application.
• Connect the unterminated wires to your application.

©National Instruments Corporation 3 LFH200 Cable Installation Instructions
Figure 1. SH200LFH-4xDB50F-C or SH200LFH-4xDB50F-S Cable
Figure 2. SH200LFH-BARE WIRE Cable
1 LFH200 Connector
2 Thumbscrews
3 Cable Leg Label
4 50-Pin Female D-SUB Connectors
1 LFH200 Connector
2 Thumbscrews
3 Cable Leg Label
4 25 Unterminated, Tinned, and Stripped Wires
4
12
3
1 2 4
3

LFH200 Cable Installation Instructions 4ni.com
Connectors
The cable in this kit connects an LFH200 connector to four, 50-pin female D-SUB connectors
marked P1–P4, or eight bundles, leg J0–J7, of unterminated, tinned, and stripped wires. The
LFH200 connector provides connection to the switch module. The 50-pin female D-SUB
connectors and unterminated wires provide connection to your application. Figures 3 and 4
show the pinouts for these connectors.
Figure 3. LFH200 Connector
Figure 4. 50-Pin Female D-SUB Connector
Pin 100
Pin 1
Pin 50
Pin 51
Pin 101
Pin 200
Pin 150
Pin 151
Pin 1
Pin 34
Pin 17
Pin 50
Pin 18
Pin 33

©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

LFH200 Cable Installation Instructions 6ni.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
NC3
NC4
150
151
149
152
148
153
147
154
146
155
51
50
52
49
53
48
54
47
55
46
COM0
COM1
COM2
COM3
COM4
NO0
NO1
NO2
NO3
NO4
NO CONNECT
NO CONNECT
NO CONNECT
NO CONNECT
NC0
NC1
NC2
NC3
NC4
150
151
149
152
148
153
147
154
146
155
51
50
52
49
53
48
54
47
55
46
NC50
COM50
NO50
NC51
COM51
COM0
COM1
COM2
COM3
COM4
NO0
NO1
NO2
NO3
NO4

©National Instruments Corporation 7 LFH200 Cable Installation Instructions
Table 1. Pin Assignment for SH200LFH-4xDB50F-C P1
50-Pin D-SUB P1
Cable PXI-2569,
SCXI-1169
Channel
PXI-2570
Channel
PXI-2571
Channel
LFH Pin
50-Pin D-SUB
Pin
26 50 COM49 NO24 NO24
27 48 COM47 NO23 NO23
28 46 COM45 NO22 NO22
29 44 COM43 NO21 NO21
30 42 COM41 NO20 NO20
31 40 COM39 NO19 NO19
32 38 COM37 NO18 NO18
33 36 COM35 NO17 NO17
34 34 COM33 NO16 NO16
35 19 COM31 NO15 NO15
36 21 COM29 NO14 NO14
37 23 COM27 NO13 NO13
38 25 COM25 NO12 NO12
39 27 COM23 NO11 NO11
40 29 COM21 NO10 NO10
41 31 COM19 NO9 NO9
42 33 COM17 NO8 NO8
43 16 COM15 NO7 NO7
44 14 COM13 NO6 NO6
45 12 COM11 NO5 NO5
46 10 COM9 NO4 NO4
47 8COM7 NO3 NO3
48 6COM5 NO2 NO2
49 4COM3 NO1 NO1
50 2COM1 NO0 NO0

LFH200 Cable Installation Instructions 8ni.com
51 1CH1 COM0 COM0
52 3CH3 COM1 COM1
53 5CH5 COM2 COM2
54 7CH7 COM3 COM3
55 9CH9 COM4 COM4
56 11 CH11 COM5 COM5
57 13 CH13 COM6 COM6
58 15 CH15 COM7 COM7
59 17 CH17 COM8 COM8
60 32 CH19 COM9 COM9
61 30 CH21 COM10 COM10
62 28 CH23 COM11 COM11
63 26 CH25 COM12 COM12
64 24 CH27 COM13 COM13
65 22 CH29 COM14 COM14
66 20 CH31 COM15 COM15
67 18 CH33 COM16 COM16
68 35 CH35 COM17 COM17
69 37 CH37 COM18 COM18
70 39 CH39 COM19 COM19
71 41 CH41 COM20 COM20
72 43 CH43 COM21 COM21
73 45 CH45 COM22 COM22
74 47 CH47 COM23 COM23
75 49 CH49 COM24 COM24
Table 1. Pin Assignment for SH200LFH-4xDB50F-C P1 (Continued)
50-Pin D-SUB P1
Cable PXI-2569,
SCXI-1169
Channel
PXI-2570
Channel
PXI-2571
Channel
LFH Pin
50-Pin D-SUB
Pin

©National Instruments Corporation 9 LFH200 Cable Installation Instructions
Table 2. Pin Assignment for SH200LFH-4xDB50F-C P2
50-Pin D-SUB P2
Cable PXI-2569,
SCXI-1169
Channel
PXI-2570
Channel
PXI-2571
Channel
LFH Pin
50-Pin D-SUB
Pin
126 50 COM48 NC24 NC24
127 48 COM46 NC23 NC23
128 46 COM44 NC22 NC22
129 44 COM42 NC21 NC21
130 42 COM40 NC20 NC20
131 40 COM38 NC19 NC19
132 38 COM36 NC18 NC18
133 36 COM34 NC17 NC17
134 34 COM32 NC16 NC16
135 19 COM30 NC15 NC15
136 21 COM28 NC14 NC14
137 23 COM26 NC13 NC13
138 25 COM24 NC12 NC12
139 27 COM22 NC11 NC11
140 29 COM20 NC10 NC10
141 31 COM18 NC9 NC9
142 33 COM16 NC8 NC8
143 16 COM14 NC7 NC7
144 14 COM12 NC6 NC6
145 12 COM10 NC5 NC5
146 10 COM8 NC4 NC4
147 8COM6 NC3 NC3
148 6COM4 NC2 NC2
149 4COM2 NC1 NC1
150 2COM0 NC0 NC0
151 1CH0 —NC50

LFH200 Cable Installation Instructions 10 ni.com
152 3CH2 —COM50
153 5CH4 —NO50
154 7CH6 —NC51
155 9CH8 —COM51
156 11 CH10 —NO51
157 13 CH12 —NC52
158 15 CH14 —COM52
159 17 CH16 —NO52
160 32 CH18 —NC53
161 30 CH20 —COM53
162 28 CH22 —NO53
163 26 CH24 —NC54
164 24 CH26 —COM54
165 22 CH28 —NO54
166 20 CH30 —NC55
167 18 CH32 —COM55
168 35 CH34 —NO55
169 37 CH36 —NC56
170 39 CH38 —COM56
171 41 CH40 —NO56
172 43 CH42 —NC57
173 45 CH44 —COM57
174 47 CH46 —NO57
175 49 CH48 —NC58
Table 2. Pin Assignment for SH200LFH-4xDB50F-C P2 (Continued)
50-Pin D-SUB P2
Cable PXI-2569,
SCXI-1169
Channel
PXI-2570
Channel
PXI-2571
Channel
LFH Pin
50-Pin D-SUB
Pin