5
The top layer is a sheet of ribbed, heavy duty
matting material. This material is of laminated
construction and is PVC based with special
additives and fillers to increase its abrasion
and chemical resistance. This material can
withstand years of pedestrian traffic and is
resistant to most chemicals commonly found
in an industrial environment including water,
coolant, oil and hydraulic fluid.
The bottom sheet is a solid smooth rubber
matting sheet.
The top sheet is 6.5mm thick and the bottom
sheet is 6mm thick.
All the upper conductors of all the switch
elements are connected together and all lower
conductors are connected together, effectively
creating a single normally open switch. Heavy
gauge tin plated copper wire is used for all
internal wiring and all connections to the
switching elements are direct solder joints.
The switches are self-bottoming and as a
result they can withstand very high loads and
repeated operation. Several million operations
is typical.
Figure 2 - Construction of CKP/Solo
Mat Sensor
Figure 3 - Construction of Tapeswitch
Switch Elements
The construction of the Tapeswitch elements
is shown in Figure 3. Each switching element
is a long normally open switch. The switch
consists of two copper plated steel conductors
held apart at the sides by an insulator. When
pressure is applied to the bead, the two
conductors are forced together in the centre,
closing the switch.
PVC SLEEVE
UPPER CONDUCTOR
LOWER CONDUCTOR
INSULATOR
PVC SLEEVE
UPPER CONDUCTOR
LOWER CONDUCTOR
TOP
LAYER
SWITCH
LAYER
BOTTOM
LAYER
FAILSAFE
CONTROLLER