Rockwell Automation 440F MatGuard, 440F-C4000 Mat Controllers - Manual (Page 26)

CONTACTOR MONITORING
Contactor monitoring is provided via the two terminals marked MC. It should be used in all dual channel
two contactor systems. If one of the contactors fails to isolate the power, the mat control unit will lock out
and prevent the re-energisation of the other contactor until the fault is rectified.
5.8 FINAL SENSOR MAT LAYOUT
Having considered these factors, the sensor mat layout can now be checked and finalised. Consider
whether the machine response time has changed from the initial calculations.
Whenever possible, mats should be arranged with the wires at the outside edge of the detection zone.
This simplifies installation and replacement if required and all wiring is protected by the perimeter trim.
5.9 WIRING
All system wiring must be protected from mechanical damage and suitably sealed for the operating
environment. Waterproof butt connectors are supplied for mat to mat connections and are protected by
the edge trim. Where wire runs are required across the floor, the 440F-T3230 wire guide can provide
suitable protection. Conduit or trunking should be used for other wire runs. The sealing integrity of the
control unit must be maintained by the use of correctly sized and tightened conduit fittings or cable
glands to IP65.
Wiring practices must be in accordance with EN 60204-1 Clause 14.
NOTE: In order to ensure the isolation of the 110/230V supply, the input power supply must be
separately routed and enter the control unit via separate fittings or glands to those used
for the output wiring. Wiring from the control unit to the mat may be buried in the floor
using conduit, or pass via the edge trim. Flexible conduit is recommended for this type of
installation. See section 6 for further details.
Determine the wiring method and determine the input and output connection points for the
mat to control unit wiring.
5.10 FINAL DETAILS
Prepare a work schedule and drawings of the installation layout and the electrical circuit. It is
recommended that all measurements and calculations are recorded and retained in the technical file for
the machine.
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