M A T C O N S T R U C T I O N
Internal workings
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SCIENTIFIC TECHNOLOGIES INC.
Call: 1/888/510-4357 in USA and Canada
Universal Safety Mat UM Series Rev. C
© STI 08/2000
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R
3 M
AT
C
ONSTRUCTION
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3 . 1 . I
N T E R N A L
W O R K I N G S
The internal switch consists of two sheets of specially flat, 24-gauge galvanealed steel. This assembly
is then sealed in a chemically engineered, PVC (Polyvinyl Chloride) Resin. This configuration
insures high resistance to impact, load, rust and moisture. The active area extends to within 1/4 in.
(6.25mm) of a Universal safety mat’s overall length and width dimensions.
3 . 2 . C
A B L E S
The Universal safety mat has a four conductor cable with a PVC (Polyvinyl Chloride) jacket. Each
individual conductor is rated at 18 AWG, 16 strand, 300VAC. The cable has a 4 pin quick disconnect
fitting on the end of it for easy installation and replacement. The individual conductors inside the
cable are color coded. The black and blue conductors are connected to the bottom electrode plate.
The brown and white conductors are connected to the top electrode plate. Standard cable length is 5
meters.
If an installation does not require the use of a quick-disconnect connection, it may be cut from the
cable to expose the individual conductors.
3 . 3 . T
R I M
3.3.1
P
ERIMETER
WARNING!
Employees must be instructed that the perimeter trim is not an active sensing
surface. Stepping only on the perimeter trim will not send a stop signal to the guarded machine.
Perimeter trim is used to provide mechanical protection for the mat cables and to fix the mat(s) in
place as required by ANSI B11.19-1990. The perimeter trim of an individual or multiple mat
installation may be either aluminum or safety yellow PVC and is designed to fit securely to the 1/4
in. (6.25mm)edge of a mat.
The support legs of perimeter ramp trim extrusions are designed to act as a wire guide. This design
protects the mat cables from external damage after installation.
Blunt Trim is not designed with wire guides, and is only intended to keep the mats secured into
position.
European norm EN 1760-1:1997, Section 4.17 states, in part, “Where there is a danger that a person
can trip on the outside edge(s) of a sensor or sensor covering, a suitable ramp shall be provided. The
slope of the ramp shall not exceed 20 degrees from the horizontal.”
The aluminum Ramp Trim and the safety yellow PVC Trim (only available in ramp design) are sloped
at 19 degrees and measure 2 1/2 in. (62.5mm) wide. Aluminum Blunt Trim is 1 in. wide and should
be used only in installations where a tripping hazard does not exist, such as against a wall, machine
or mechanical guard.
STI CONTROLLER MODEL
Conductor Color
SMC-1M6
SMC-2
MC3
MC4
Brown
W1
S13
M12
Brown
Black
B1
S23
M11
Black
Blue
B2
S24
M21
Blue
White
W2
S14
M22
White
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