Specifications

Presence Sensing Safety Devices
MatGuard™ Mats
2-93
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Publication S117-CA001A-EN-P
Overview
General1-Principles2-Safety Mats3-Safety Switches4-Operator
Interface
5-Logic
R
T= t
1
+ t
2
0.035 + 0.485
0.520 s
S = (1600 x 0.520) + 1200
832 + 1200
2032 mm
Sensor mats will be required from 2032 mm right up to the edge of
the machine base plate.
The response time of the machine and control system used in the
calculation must be the worst case time. Some machines have
inconsistent response times that are dependent upon mode of
operation, nature of the work piece and point in the operating cycle
at which stopping is initiated. An allowance should be made for
wear in brakes, temperature, aging of components, etc., if this can
affect the response time. An allowance for further delays in the
machine control system may be required in some circumstances.
Calculation Example
In this example, the MatGuard system is being used with a machine
and control system whose worst case response time has been
measured as 0.485 seconds. The system is on a flat surface, it is
not on a raised platform. Using the formula above,