Specifications

Presence Sensing Safety Devices
MatGuard™ Mats
2-91
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Publication S117-CA001A-EN-P
Overview
General1-Principles2-Safety Mats3-Safety Switches4-Operator
Interface
5-Logic
R
Anatomy of a Mat System
Standards
The MatGuard mat system has been designed to conform with the
latest European Standard EN 1760-1 “Safety of machinery—
Pressure sensitive devices; mats and floors.”
This standard contains requirements for all aspects of design. Some
of the most important points are as follows: (From 4.2.2) Where an
effective sensing area is built up from more than one sensor (mat) it
shall have no dead zone.
The standard gives details of the size, force and positioning of test
pieces for testing the mat sensitivity.
(From 4.5.1) A single sensor (mat) shall still perform its function
after one million actuations by a mass of 75 kg.
(From 4.7) When the actuating force is applied the output signal
switching device(s) shall change from an ON state to an OFF state.
It shall remain in the OFF state for at least as long as the actuating
force is applied.
(From 4.7.1) Device with reset – b) After the actuating force has
been removed, the output signal switching device(s) shall only
change to the ON state after the application of a reset signal.
(From 4.7.2) Device without reset—For a pressure sensitive mat
without reset the output signal switching device(s) shall change to
an ON state at power ON and after the actuating force has been
removed.
(From 4.15) The pressure sensitive mats shall meet the
requirements of the category for which they are specified...
Note: The MatGuard mat system features an “active” mat and a
dual channel monitoring control unit. This means that a single
electrical fault in the mat, wiring or control unit will be detected and
the control unit will go to a safe (OFF) condition.
(From informative annex B.1.1) The top (mat) surface should be of
a material which will withstand the operating duty.....The top surface
should not present a risk through becoming slippery due to wear or
the effects of liquids....
(From informative annex B.1.7) In some situations, heavy loads
(such as fork lift trucks) can be applied to the sensor (mat)..... If this
is required the user should identify the need to the mat
manufacturer.
When the mat is
activated the non conductive
compressible separators (shown
red) compress into their recess
allowing the two plates to make
contact giving all over sensitivity.
Different ribbed pattern on reverse side
(
as illustrated
)
Checker pattern
(side 1) (for
maximum anti-slip)
Straight rib pattern
(side 2) (for ease of
cleaning in 'hygiene'
applications)
Wire
location
STD. 4.5 m
Wire
location
Heavy Duty Ribbed Vinyl
Flexible Sealing Bead
Non conductive Compressible Separator
Lower Conductive Plate
Upper Conductive Plate
Heavy Duty Ribbed Vinyl
Mat
at rest
Mat
Activated
Perimeter trim secures mats to floor
Cable underneath trim
Active uniting trim maintains active
sensing area at mat junctions
The controller detects a presence on the
mat, a short circuit, or an open circuit.
Under each of these conditions, the safety
output relays turn off. When interfaced
properly, the machine or hazardous motion
will receive a stop signal, and an auxiliary
output relay turns ON.