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                         NEC 

Solutions 

(America), 

Inc.

 

    

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Visual Systems 

LT240 Installation Guide 

Desktop and Ceiling Mount

  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

v3.0

 

www.necvisualsystems.com 

 

 

Page 3 of 7 

 

Projection Distance and Screen Size for Desktop 

The following diagram shows the relationship between projector position and the screen. 
Distances are in inches. For millimeters multiply by 25.4. 
 

Desktop Setup 

 

C

Throw Distance

D

Screen Bottom

B

Screen Ctr

Lens Ctr

3.27"

α

 

Distance Chart 

B

D

Diagonal

Width(H)

Height(V)

wide - tele

wide - tele

inches

inches

inches

inches

inches

30

24

18

12.6

35.7 - 43.4

3.6

19.4 - 16.2

40

32

24

16.8

48.2 - 58.4

4.8

19.2 - 16.0

60

48

36

25.2

73.2 - 88.5

7.2

19.0 - 15.9

67

53.6

40.2

28.1

81.9 - 99.0

8.0

19.0 - 15.9

72

57.6

43.2

30.2

88.1 - 106.5

8.6

18.9 - 15.8

84

67.2

50.4

35.3

103.1 - 124.6

10.1

18.9 - 15.8

90

72

54

37.8

110.6 - 133.6

10.8

18.9 - 15.8

100

80

60

42.0

123.1 - 148.6

12.0

18.8 - 15.8

120

96

72

50.4

148.1 - 178.7

14.4

18.8 - 15.8

150

120

90

63.0

185.5 - 223.8

18.0

18.8 - 15.7

180

144

108

75.6

223.0 - 268.9

21.6

18.7 - 15.7

210

168

126

88.2

260.4

314.0

25.2

18.7

15.7

240

192

144

100.8

297.9

359.1

28.8

18.7

15.7

270

216

162

113.4

335.4

404.1

32.4

18.7

15.7

300

240

180

126.1

372.8

449.2

36.1

18.7

15.7

350

280

210

147.1

435.2

524.4

42.1

18.7

15.7

400

320

240

168.1

497.7

599.6

48.1

18.7

15.7

450

360

270

189.1

560.1

674.7

54.1

18.7

15.7

500

400

300

210.1

622.5 - 749.9

60.1

18.6 - 15.7

Screen Size (4:3)

C

inches

α

degrees

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 

 

 

 

 

 

 

Note: 

For screen sizes not indicated on the projection tables, use the formulas on page 1. 

Summary of Contents for LT240 Series

Page 1: ...m Notes For screen sizes not indicated on the projection tables use the formulas below If the figures on the tables do not match the results of formulas use the figures in the table The ceiling must be strong enough to support the projector and the installation must be in accordance with any local building codes All calculations are based on 4 3 aspect ratio Distances are in inches for millimeters...

Page 2: ...16 8 48 2 58 4 4 8 19 2 16 0 60 48 36 25 2 73 2 88 5 7 2 19 0 15 9 67 53 6 40 2 28 1 81 9 99 0 8 0 19 0 15 9 72 57 6 43 2 30 2 88 1 106 5 8 6 18 9 15 8 84 67 2 50 4 35 3 103 1 124 6 10 1 18 9 15 8 90 72 54 37 8 110 6 133 6 10 8 18 9 15 8 100 80 60 42 0 123 1 148 6 12 0 18 8 15 8 120 96 72 50 4 148 1 178 7 14 4 18 8 15 8 150 120 90 63 0 185 5 223 8 18 0 18 8 15 7 180 144 108 75 6 223 0 268 9 21 6 1...

Page 3: ...53 6 40 2 28 1 81 9 99 0 8 0 19 0 15 9 72 57 6 43 2 30 2 88 1 106 5 8 6 18 9 15 8 84 67 2 50 4 35 3 103 1 124 6 10 1 18 9 15 8 90 72 54 37 8 110 6 133 6 10 8 18 9 15 8 100 80 60 42 0 123 1 148 6 12 0 18 8 15 8 120 96 72 50 4 148 1 178 7 14 4 18 8 15 8 150 120 90 63 0 185 5 223 8 18 0 18 8 15 7 180 144 108 75 6 223 0 268 9 21 6 18 7 15 7 210 168 126 88 2 260 4 314 0 25 2 18 7 15 7 240 192 144 100 8...

Page 4: ...LATION VENTILATION 2 756 3 169 4 213 4 724 12 559 10 827 3 268 7 362 1 398 2 303 2 8 3 5 3 031 10 236 2 244 3 622 4 094 v3 0 www necvisualsystems com Page 4 of 7 Cabinet Dimensions The following diagrams show the cabinet dimensions for the LT240 Dimensions are in inches For millimeters multiply by 25 4 ...

Page 5: ...nt FOR CEILING MOUNT 3 M4x10 VENTILATION 2 559 4 213 1 594 7 283 0 984 8 799 SECURITY SLOT 2 303 v3 0 www necvisualsystems com Page 5 of 7 Cabinet Dimensions continued The following diagrams show the cabinet dimensions for the LT240 Dimensions are in inches For millimeters multiply by 25 4 ...

Page 6: ... 3 50 7 52 3 99 8 12 2 38 0 59 2 84 Flush Base 0 5 0 1 75 1 99 1 99 3 99 v3 0 www ne Page 6 of 7 cvisualsystems com Optional Ceiling Mount Dimensions Model LT60CM The following diagrams show ceiling mount dimensions for the LT240 Dimensions are in inches For millimeters multiply by 25 4 The LT60CM comes with a threaded pipe base and a flush base for minimal mount height ...

Page 7: ...H 00H 00H 12H PICTURE MUTE OFF 02H 11H 00H 00H 00H 13H SOUND MUTE ON 02H 12H 00H 00H 00H 14H SOUND MUTE OFF 02H 13H 00H 00H 00H 15H ON SCREEN MUTE ON 02H 14H 00H 00H 00H 16H ON SCREEN MUTE OFF 02H 15H 00H 00H 00H 17H Cable Connection Communication Protocol Baud Rate 38400 bps Data Length 8 bits Parity No Parity Stop Bit One bit X on off None Communications Full duplex PC Control Connector DIN 8P T...

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