Nec VT650 Installation Data

Visual Systems

VT650 Installation Data

Desktop and Ceiling Mount

Contents

Product Description, Lens Specs, Notes and Formulas Page 1
Projection Distances and Screen Sizes

Ceiling Mount Installation

Desktop Setup

Cabinet Dimensions
Top, Front and Right Side
Bottom, Back and Left Side

Ceiling Mount Dimensions
Control Codes

Product Description

Type: 3 panel, 0.9” p-Si TFT w/MLA LCD projector Dimensions: 9.57”(W) x 4.0”(H) x 11.2”(D)
Native Resolution: 1024 x 768 Weight: 8.8 lbs
Brightness: 1500 ANSI Lumens Manual Zoom/Manual Focus

Lens Specifications

Throw Ratio: 1.8 - 2.2:1(approx.) Focal Length: 33.5mm – 40.2mm
Offset Angle: 9.3 °-9.7 °(wide)/7.8 °-8.1 °(tele) F/#: 1.7 – 2.0
Screen Sizes: 25”-300”

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 LCD 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 multiply by 25.4.

• Distances may vary ±5%.

Formulas

Units: Inches (for millimeters multiply final number by 25.4)

Definitions:

H = Horizontal Screen Width (4:3)
V = Vertical Screen Height (4:3)
B = Vertical distance between lens center and screen center
C = Throw distance
D = Vertical distance between lens center and screen top (screen bottom for desktop application)
α = Throw Angle

Projection Formulas:

B = 0.3007H H = Screen Diagonal x 4/5

C (wide) = 1.8381H – 1.724 V = Screen Diagonal x 3/5

C (tele) = 2.2057H – 1.724 Screen Diagonal = H x 5/4

D = 0.0743H

α (wide) = tan

α (tele) = tan

-1

-1

Screen Formulas (4:3):

(B/C(wide))

(B/C(tele))

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ver 1.5

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Visual Systems

VT650 Installation Data

Desktop and Ceiling Mount ver 1.5

Projection Distance and Screen Size for Ceiling Mount

The following shows the proper relative position of the projector and screen. Refer to the table for installation data.
Distances are in inches. For millimeters multiply by 25.4.

Ceiling Mount Installation

5.9"

Lens Offset from
Mount Pipe

Screen Top

Lens Ctr

Screen Ctr

C

Throw Distance

D

α

B

5.5"

1.4"

Distance Chart

Screen Size (4:3)

BD

Diagonal Width(H) Height (V)

inches inches inches inches inches

C

wide - tele

inches

α

wide - tele

degrees

25 20 15 6.0 NA - 42.4 1.5 NA - 8.1
40 32 24 9.6 57.1 - 68.9 2.4 9.6 - 8.0
60 48 36 14.4 86.5 - 104.1 3.6 9.5 - 7.9
67 53.6 40.2 16.1 96.8 - 116.5 4.0 9.5 - 7.9
72 57.6 43.2 17.3 104.2 - 125.3 4.3 9.4 - 7.9
84 67.2 50.4 20.2 121.8 - 146.5 5.0 9.4 - 7.9

90 72 54 21.7 130.6 - 157.1 5.3 9.4 - 7.8
100 80 60 24.1 145.3 - 174.7 5.9 9.4 - 7.8
120 96 72 28.9 174.7 - 210.0 7.1 9.4 - 7.8
150 120 90 36.1 218.8 - 263.0 8.9 9.4 - 7.8
180 144 108 43.3 263.0 - 315.9 10.7 9.4 - 7.8
210 168 126 50.5 307.1 - 368.8 12.5 9.3 - 7.8
240 192 144 57.7 351.2 - 421.8 14.3 9.3 - 7.8
270 216 162 65.0 395.3 - NA 16.0 9.3 - NA
300 240 180 72.2 439.4 - NA 17.8 9.3 - NA

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

Page 2

Visual Systems

VT650 Installation Data

Desktop and Ceiling Mount ver 1.5

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

Screen Ctr

B

Throw Distance

α

Projector Feet

Lens Ctr

Scrn Bottom

D

2.3"

Distance Chart

Screen Size (4:3)

BD

Diagonal Width(H) Height (V)

inches inches inches inches inches

C

wide - tele

inches

α

wide - tele

degrees

25 20 15 6.0 NA - 42.4 1.5 NA - 8.1

40 32 24 9.6 57.1 - 68.9 2.4 9.6 - 8.0

60 48 36 14.4 86.5 - 104.1 3.6 9.5 - 7.9

67 53.6 40.2 16.1 96.8 - 116.5 4.0 9.5 - 7.9

72 57.6 43.2 17.3 104.2 - 125.3 4.3 9.4 - 7.9

84 67.2 50.4 20.2 121.8 - 146.5 5.0 9.4 - 7.9

90 72 54 21.7 130.6 - 157.1 5.3 9.4 - 7.8
100 80 60 24.1 145.3 - 174.7 5.9 9.4 - 7.8
120 96 72 28.9 174.7 - 210.0 7.1 9.4 - 7.8
150 120 90 36.1 218.8 - 263.0 8.9 9.4 - 7.8
180 144 108 43.3 263.0 - 315.9 10.7 9.4 - 7.8
210 168 126 50.5 307.1 - 368.8 12.5 9.3 - 7.8
240 192 144 57.7 351.2 - 421.8 14.3 9.3 - 7.8
270 216 162 65.0 395.3 - NA 16.0 9.3 - NA
300 240 180 72.2 439.4 - NA 17.8 9.3 - NA

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

Page 3

VT650 Installation Data

Desktop and Ceiling Mount

Cabinet Dimensions

The following diagrams show the cabinet dimensions for the VT650.
Dimensions are in inches. For millimeters multiply by 25.4.

ver 1.5

Visual Systems

£

£

£
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£

3
7
6

.
1
1

5
6
1

.
1
1

8
0
5

.
0

9.571 0.035

1.311

VT650

5
3
0

.
4

1
5
5

.
0

5
2
9

.
1

units: inches

7
8
5

.
4

Page 4

VT650 Installation Data

Desktop and Ceiling Mount

Cabinet Dimensions (continued)

The following diagrams show the cabinet dimensions for the VT650.
Dimensions are in inches. For millimeters multiply by 25.4.

ver 1.5

3.811

7.480

Visual Systems

M4*10
Mount

8
8
7

.
8

7

M4*10

8
7

.

Mount

0

3.201 3.201

M4*10

Mount

M4*10
Mount

4
4
2

.
7

6
3
2

.
0

0.386

units: inches

7.402

Page 5

VT650 Installation Data

Desktop and Ceiling Mount

Optional Ceiling Mount Dimensions (Model #: VT40CM)

The following diagrams show ceiling mount dimensions for the VT650.
Dimensions are in inches. For millimeters multiply by 25.4.

8.00

3.75

4.00

ver 1.5

68°

TYP

°

4

3

P

Y

T

TYP

22°

∅

∅

∅

.41 TYP

.34 TYP

1.94

Visual Systems

units: inches

3.75

8.00

4.00

3.0

5° UP

15° DOWN

Page 6

Visual Systems

VT650 Installation Data

Desktop and Ceiling Mount ver 1.5

PC Control Codes

Function Code Data

POWER ON 02H 00H 00H 00H 00H 02H

POWER OFF 02H 01H 00H 00H 00H 03H

INPUT SELECT RGB 02H 03H 00H 00H 02H 01H 01H 09H

INPUT SELECT VIDEO 02H 03H 00H 00H 02H 01H 06H 0EH

INPUT SELECT S-VIDEO 02H 03H 00H 00H 02H 01H 0BH 13H

PICTURE MUTE ON 02H 10H 00H 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

Cable Connection

Communication Protocol:
Baud Rate: 19200 bps
Data Length: 8 bits
Parity: No Parity
Stop Bit: One bit
X on/off: None
Communications: Full duplex

PC Control Connector (DIN-8P)

To RxD of PC

678

345

12

To GND of PC

NOTE 1: Pins 2, 3, 5, 6 and 8 are used inside the projector.
NOTE 2: For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.

To TxD of PC

Page 7