WARNING
High ac mains voltages may be present at the system power supply
unit and at the relay terminals of the interface cards. Appropriate
safety precautions must be taken when commissioning or servicing
the system.
IMPORTANT
Commissioning and maintenance of the system should be carried out
by trained authorised personnel only.
1. GENERAL
The following guide to commissioning and maintenance should be used
inconjunctionwiththerelevantinstructionsissuedwiththe sensors
being used.
2. START UP PROCEDURE
A detailed check of the system wiring should be carried out prior to this
start-up procedure.
Start-up the system as follows:
(1) Ensure that the system power supply is switched off.
(2) Disconnect the power supply connections to the DC Input Card by
removingthetwopartconnectorTB1andTB2iftted.
(3) Unscrew the two retaining screws used to secure the control cards
and then, using the extraction tool, partially remove the cards from
the rack so that there is no electrical connection between the control
cards and the backplane.
(4) Switch on the system power supply.
(5) Check that a voltage of between 18V and 32V dc exists at the
terminal block TB1 (and for individually power systems on each of
the Quad Relay Interface Card terminals 35 and 36).
(6) Switch off the power supply.
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