3
1.2 PRODUCT RANGE
1.2.1 SENSORS
1.2.1.1 SENSOR SHAPES AND SIZES
Mat sensors can be produced in any shape and
size which meets the following restrictions:
-
all corners, internal or external, should be
90 degrees.
-
the maximum possible width of a mat is
1200 millimetres.
-
the maximum possible length of a mat is
2400 millimetres.
-
the maximum total area is 2.88m².
Rectangular shapes are preferred although any
shape which meets the restrictions outlined
above is possible.
The dimensions of sensors and their layout
must be such access to the machine is not
possible without stepping on a sensor. It should
not be possible to move the sensors or bridge
them using boards, plates etc. Further guidance
is given in section 1.6.
NOTE: CKP/S1 sensors have an inactive area
around the outer edges. This inactive area is 30
millimetres wide which means that the
dimensions of the active area (i.e. the zone
within which the application of pressure will
actuate the sensor) is 60 millimetres less than
the overall dimensions of the mat as shown in
Figure 1. This should be borne in mind when
specifying the size of mat for a particular
application. See section 1.6 for further
guidance on determining sensor dimensions.
1. INTRODUCTION
1.1 PRODUCT DESCRIPTION
Tapeswitch safety mat systems are pressure
sensitive safety devices designed to protect
operators working at or near dangerous
machinery. A system consists of a pressure
sensitive sensor and a control unit. When
correctly installed at and interfaced to a suitable
machine the system will:
(a)
detect a person present in the dangerous
area and prevent dangerous motion from
occurring.
(b)
detect a person entering the dangerous
area and cause dangerous motion to cease
before the person can reach the dangerous
parts.
(c)
a combination of
(a)
and
(b)
.
Pressure sensitive sensors are fixed to the floor.
The area covered by the sensor depends on
which of the functions (a), (b) or (c) is to be
performed. When a person steps onto a sensor
a signal is transmitted to the control unit which
will in turn transmit a stop signal to the
machine control system.
Figure 1
-
Dimensions of the inactive area
around outer edge of sensor
ACTIVE
AREA
30
30
3
0
3
0
