NEC Display Solutions of America, Inc.
M271X/M311X Installation Guide
Ceiling Mounted and Desktop
Rev 1.0
www.necdisplay.com
M271X, M311X Page 2 of 6
Diagrams
and
Distance
Charts
The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation.
Distances are in inches. For millimeters multiply by 25.4.
Ceiling Mounted
Desktop
Distance Chart for popular 4:3 screens
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.
Lens Offset From
Mount Pipe
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.22"
C
Throw Distance
Screen Top
4.56"
5.17"
D
B
Lens Ctr
Screen Ctr
D
2.79
Diagonal Width(W) Height (H)
inches
inches
inches
inches
30
24
18
6
31
-
53
11.3 -
6.7
60
48
36
12
64
-
107
11.0 -
6.6
67
54
40.2
14
71
-
120
10.9 -
6.6
72
58
43.2
15
77
-
129
10.9 -
6.6
84
67
50.4
17
90
-
151
10.9 -
6.6
90
72
54
19
97
-
162
10.9 -
6.6
100
80
60
21
108
-
180
10.9 -
6.5
120
96
72
25
129
-
216
10.8 -
6.5
150
120
90
31
162
-
270
10.8 -
6.5
180
144
108
37
195
-
325
10.8 -
6.5
210
168
126
43
228
-
379
10.8 -
6.5
240
192
144
49
261
-
434
10.8 -
6.5
270
216
162
56
293
-
488
10.8 -
6.5
300
240
180
62
326
-
543
10.7 -
6.5
Screen Size (16:10)
-3
inches
B
C
w ide - tele
inches
-28
degrees
D
α
w ide - tele
-6
-6
-7
-8
-8
-9
-11
-14
-17
-20
-22
-25
