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1. POLYCARBONATE PROTECTION
For more information, call 1-800-888-4784 (4STI) or visit www.sti-usa.com
KEY features
General Information
· Protection for large units against
physical damage, grime and severe
environments.
· Can be used over volume or lighting
controls.
· Each protected unit can be clearly
seen and quickly identified.
· Three year guarantee against
breakage of polycarbonate in
normal use.
Construction
· 94V-2 flammability rating.
· Cover, integrated hinge and
spacers are formed from tough
polycarbonate material.
Installation
· Fast and easy installation.
· Mounting hardware and gaskets are
included.
· Typical working properties of
polycarbonate are -40° to 250°F
(-40° to 121°C).
Options
· Key or thumb lock available.
STI polycarbonate
enclosure
Product Overview
Multipurpose lockable enclosure for a wide range of larger size devices, components
and instruments, such as keypads, annunciators and automated external defibrillators
(AEDs) which require protection from vandalism, accidental damage, as well as the
elements, such as dirt and grime. Spacers, integrated hinge and covers are formed
from tough polycarbonate material. The polycarbonate enclosures are backed by a
three year guarantee against breakage and damage in normal use. STI enclosure is
lockable with either a key or thumb lock.
STI-7500A
STI-7511D

2. Printed in U.S.A., © 1987-2009 Safety Technology International, Inc.
2306 Airport Road
Waterford, Michigan
48327, USA
Tel: 248-673-9898
Fax: 248-673-1246
Toll-free: 800-888-4784
info@sti-usa.com
www.sti-usa.com
Unit 49G Pipers Road
Park Farm Industrial Estate
Redditch, Worcestershire
B98 OHU England
Tel: 44 (0) 1527 520 999
Fax: 44 (0) 1527 501 999
www.sti-europe.com
05/11Subject to change without notice.
approvals warranty
TESTING
The STI-7500 series only has been tested and approved or listed by:
· UL/cUL Listed No. S7255
WARRANTY
Three year guarantee against breakage of polycarbonate in normal
use.
NOTICE
STI recommends replacement of gaskets every five years for
outdoor applications.
STI Polycarbonate Enclosure
Dimensions and Technical Information
build your model
ENCLOSED BACK BOX
A = Enclosed deep back box
B = Enclosed back box with double-gang electrical box
F = Enclosed back box
OPEN BACK BOX
C = Open back box for flush mount applications
D = Open conduit back box, surface mount applications
E = Open back box for flush mount applications
NOTE: Below pictures illustrate back box differences.
STI-75
Accessories
18021 NEMA 4X 3/4” ridgid conduit hub for “A” back box
18254 Replacement key #CH751
SUB-318 Adapter plate used for mounting “A”, “B” or “F”
back box to pedestal
SUB-6297B20 3/4” conduit hub for “B”, “C” and “F” back boxes
STI-1283 Backplate
0 = Internal Lock 1 = External Lock
0 = Key Lock 1 = Thumb Lock
G H K L M N P
A 8.48 5.40 6.48 3.40 8.48 6.48 4.59
B 8.50 5.40 5.50 0.55 8.50 5.50 1.74
C 7.81 4.80 5.25 1.76 7.81 5.25 2.95
D 7.73 5.40 5.70 2.79 7.73 5.70 3.98
E 7.70 5.40 5.71 1.01 7.70 5.71 2.20
F 8.30 4.80 5.63 1.60 8.30 5.63 2.79
STI-7500/7501B
A
C
K
B
O
X
STI-7510/7511
M N P
A 8.48 6.48 4.59
B 8.50 5.50 1.74
C 7.81 5.25 2.95
D 7.73 5.70 3.98
E 7.70 5.71 2.20
F 8.30 5.63 2.79
B
A
C
K
B
O
X
6.46
(164)
8.41
(213)
5.17 (131)
4.50 (114)
6.46
(164)
8.41
(213)
5.17 (131)
9.94
(253)
9.91 (252)
8.44 (214)
4.50
(114)
P
M
5.17
(131)
9.94
9.91
8.44
N
8.44 (214)
9.91 (252)
9.33
(237)
4.79
(121)
3.37
(85)
5.36
(136)
4.16
(105)
6.46
(164)
8.41
(213)
NOTE: Dimensions measure inches (mm).
8.44 (214)
9.91 (252)
9.91
G 9.33
H K
L
STI-7500A (KEY LOCK)
STI-7501A (THUMB LOCK)
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-7500E (KEY LOCK)
STI-7501E (THUMB LOCK)
STI-7500F (KEY LOCK)
STI-7501F (THUMB LOCK)
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
A BACKBOX B BACKBOX C BACKBOX
Y LOCK)
MB LOCK)
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-7500E (KEY LOCK)
STI-7501E (THUMB LOCK)
STI-7500F (KEY LOCK)
STI-7501F (THUMB LOCK)
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
A BACKBOX B BACKBOX C BACKBOX
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-7500E (KEY LOCK)
STI-7501E (THUMB LOCK)
STI-7500F (KEY LOCK)
STI-7501F (THUMB LOCK)
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
BACKBOX B BACKBOX C BACKBOX
STI-7500A (KEY LOCK)
STI-7501A (THUMB LOCK)
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
A BACKBOX B BACKBOX
D BACKBOX E BACKBOX
F BAC
C BA
STI-7500A (KEY LOCK)
STI-7501A (THUMB LOCK)
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-
STI-7
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
A BACKBOX B BACKBOX
D BACKBOX E BACKBOX
F BACKBOX
C BACKBOX
STI-7500A (KEY LOCK)
STI-7501A (THUMB LOCK)
STI-7500B (KEY LOCK)
STI-7501B (THUMB LOCK)
STI-7500D (KEY LOCK)
STI-7501D (THUMB LOCK)
STI-7500E (KEY LOCK)
STI-7501E (THUMB LOCK)
STI-7500C (KEY LOCK)
STI-7501C (THUMB LOCK)
A BACKBOX B BACKBOX
D BACKBOX E BACKBOX
F BACKBOX
C BACKBOX
A BACK BOX B BACK BOX C BACK BOX D BACK BOX E BACK BOX F BACK BOX