National Instruments LFH200 Installation Instructions Manual

INSTALLATION INSTRUCTIONS

LFH200 Cable

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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

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.

LFH200 Cable Installation Instructions 2ni.com

1 LFH200 Connector

4

1

2

3

2 Thumbscrews

Figure 1. SH200LFH-4xDB50F-C or SH200LFH-4xDB50F-S Cable

3 Cable Leg Label
4 50-Pin Female D-SUB Connectors

1 2 4

3

1 LFH200 Connector
2 Thumbscrews

3 Cable Leg Label
4 25 Unterminated, Tinned, and Stripped Wires

Figure 2. SH200LFH-BARE WIRE Cable

© National Instruments Corporation 3 LFH200 Cable Installation Instructions

Connectors

Pin 1

Pin 34

Pin 17

Pin 50

Pin 18

Pin 33

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.

Pin 51

Pin 50

Pin 1

Pin 100

Pin 150

Pin 151

Pin 200

Pin 101

LFH200 Cable Installation Instructions 4ni.com

Figure 3. LFH200 Connector

Figure 4. 50-Pin Female D-SUB Connector

Cable Configurations

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

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.

© National Instruments Corporation 5 LFH200 Cable Installation Instructions

Figure 6. Twisted Pair Groupings for the PXI-2570

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

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.

LFH200 Cable Installation Instructions 6ni.com

Table 1. Pin Assignment for SH200LFH-4xDB50F-C P1

50-Pin D-SUB P1

Cable

PXI-2569,

LFH Pin

50-Pin D-SUB

Pin

SCXI-1169

Channel

PXI-2570

Channel

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

PXI-2571

Channel

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 8 COM7 NO3 NO3

48 6 COM5 NO2 NO2

49 4 COM3 NO1 NO1

50 2 COM1 NO0 NO0

© National Instruments Corporation 7 LFH200 Cable Installation Instructions

Table 1. Pin Assignment for SH200LFH-4xDB50F-C P1 (Continued)

50-Pin D-SUB P1

Cable

PXI-2569,

LFH Pin

50-Pin D-SUB

Pin

SCXI-1169

Channel

PXI-2570

Channel

PXI-2571

51 1 CH1 COM0 COM0

52 3 CH3 COM1 COM1

53 5 CH5 COM2 COM2

54 7 CH7 COM3 COM3

55 9 CH9 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

Channel

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

LFH200 Cable Installation Instructions 8ni.com

Table 2. Pin Assignment for SH200LFH-4xDB50F-C P2

50-Pin D-SUB P2

Cable

PXI-2569,

LFH Pin

50-Pin D-SUB

Pin

SCXI-1169

Channel

PXI-2570

Channel

PXI-2571

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

Channel

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 8 COM6 NC3 NC3

148 6 COM4 NC2 NC2

149 4 COM2 NC1 NC1

150 2 COM0 NC0 NC0

151 1 CH0 — NC50

© National Instruments Corporation 9 LFH200 Cable Installation Instructions

Table 2. Pin Assignment for SH200LFH-4xDB50F-C P2 (Continued)

50-Pin D-SUB P2

Cable

PXI-2569,

LFH Pin

50-Pin D-SUB

Pin

SCXI-1169

Channel

PXI-2570

Channel

PXI-2571

Channel

152 3 CH2 — COM50

153 5 CH4 — NO50

154 7 CH6 — NC51

155 9 CH8 — 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

LFH200 Cable Installation Instructions 10 ni.com

Table 3. Pin Assignment for SH200LFH-4xDB50F-C P3

50-Pin D-SUB P3

Cable

PXI-2569,

LFH Pin

50-Pin D-SUB

Pin

SCXI-1169

Channel

PXI-2570

Channel

PXI-2571

101 50 COM98 — NC49

102 48 COM96 — NC48

103 46 COM94 — NC47

104 44 COM92 — NC46

105 42 COM90 — NC45

106 40 COM88 — NC44

107 38 COM86 — NC43

108 36 COM84 — NC42

109 34 COM82 — NC41

110 19 COM80 — NC40

111 21 COM78 NC39 NC39

Channel

112 23 COM76 NC38 NC38

113 25 COM74 NC37 NC37

114 27 COM72 NC36 NC36

115 29 COM70 NC35 NC35

116 31 COM68 NC34 NC34

117 33 COM66 NC33 NC33

118 16 COM64 NC32 NC32

119 14 COM62 NC31 NC31

120 12 COM60 NC30 NC30

121 10 COM58 NC29 NC29

122 8 COM56 NC28 NC28

123 6 COM54 NC27 NC27

124 4 COM52 NC26 NC26

125 2 COM50 NC25 NC25

176 1 CH50 — COM58

© National Instruments Corporation 11 LFH200 Cable Installation Instructions