Mounting Heads On Conveyors - Loma IQ2 User Manual

112
Installing the metal
detector
Relay contact information
When connecting your own reject device refer to the voltage free relay connection
information given below. It is suggested that the reject device wiring is connected in series
with a set of fault relay contacts to enable the reject to be operated in the event of a system
fault being generated, ensuring failsafe reject operation for a fault condition. Contact
switching information is given in About the metal detector range, page 1.
Connections are made depending upon your requirement. Contacts shown are for relays
when de-energized (failsafe):
Pin1
Reject relay 2 contact sets
NC C NO NC C NO
• Check that all connections are secure and correct, then securely refit the terminal access
plate to the power supply cover.
• Close and secure the control box door.
• Please refer to Appendix F for details for connecting reject confirmation, bin full and
product registration photo-eyes.

Mounting heads on conveyors

Loma has been manufacturing metal detector systems for many years now, and our current
conveyor design incorporates this wealth of experience. There are a number of points to
watch when fitting a new Loma Metal Detector head to an existing conveyor of whatever
manufacture, or when building a new conveyor to incorporate a metal detector head, if
nuisance triggering necessitating operation at reduced sensitivity settings is to be avoided.
• The conveyor must be of substantial and welded – not bolted – construction.
• There shall be no fixed metal closer to the centre of the detector aperture than 1.5 times
the smaller of the two aperture dimensions; see Further information, page 118.
• There should be no moving metal closer to the centre of the head aperture than three
times the smaller of the two aperture dimensions.
• The head should be mounted on the conveyor using the mounting kit supplied.
• The conveyor belt should be of plastic construction with an angled heat sealed or
vulcanised joint. Straight joints using even non-metallic clips must not be used. Rollers
should be PVC coated steel or of high grade stainless steel construction.
Fault relay 2 contact sets Error relay Run relay
NC C NO NC C NO NC C NO NC C NO
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