4
2. TECHNICAL DESCRIPTION
2.1 SYSTEM OVERVIEW
A sensor may consist of a single mat sensor
or a combination of mat sensors. When a
person stands on the sensor it is detected, and
by means of its output switching devices, the
sensor causes dangerous motion to cease or
be prevented.
IMPORTANT
From the above it can be seen that the
safe use of the CKP/Solo Mat relies not
only on the safety integrity of the mat
itself but also on its mechanical and
electrical interfacing to the machine.
The safety integrity of the CKP/Solo
mat itself is the responsibility of
Tapeswitch.
Proper mechanical and electrical
interfacing is the responsibility of the
user. Comprehensive information for
this purpose is provided in section 4 of
this manual.
2.2 SENSORS
2.2.1 SENSOR SHAPES AND SIZES
Mat sensors can be produced in any shape
and size which meets the following restrictions:
- all corners, internal or external, to be 90º.
- the maximum width of a mat is 1200 mm.
- the maximum length of a mat is 2400 mm.
- the maximum total area is 2.88m².
Figure 1 - Dimensions of the inactive area
around outer edge of sensor
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.
NOTE
- CKP/
Solo
sensors have a 30mm
inactive area around the outer edges, which
means that the dimensions of the active area
(i.e. the area within which the application of
pressure will actuate the sensor) is 60mm less
than the overall dimensions of the mat as
shown in Figure 1. This should be kept in mind
when specifying the size of mat for a particular
application.
2.2.2 CKP/Solo SENSORS
The construction of the CKP/
Solo
sensor is
shown in Figure 2. A network of Tapeswitch
ribbon switching elements is sandwiched
between two thick sheets of PVC material.
The switching elements are connected in
series and are connected to the integral
fail-safe monitor. The switch elements are
adhered to the bottom layer.
30
ACTIVE
AREA
30
30
30