InSpec Remote I/O HUB (ATEX, IECEx)
Section 13: : Troubleshooting
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: Troubleshooting
SOLVING COMMON PROBLEMS
Instrument does not power up?
Check the integrity of the power supply connected to the unit and verify that it is within the
acceptable limits (See Section 4: Field Connections).
AC mains powered units:-
Check that the 20mm fuse in the fused terminal ‘F1’, on the main terminal rail is good
and of the correct size and type (Section 14: - Spare Fuses).
Check the green ‘DC on’ LED indicator is on for any AC/DC PSUs fitted.
DC 24V powered units:-
Check that the 20mm fuse in the fused terminal ‘F4’, on the main terminal rail is good
and of the correct size and type (Section 14: - Spare Fuses).
AC or DC powered units:-
Check that the green status LED on each Jiskoot RIO-xxx Module is flashing.
The RIO-xxx Modules have an integral ‘PTC Resettable Fuse’ on the 24V DC power
supply inlet. If the fuse has “blown,” power down the unit for 1 minute to reset the fuse.
Then power the unit up again.
Instrument power fuses keep blowing?
If the AC power fuses or 24V DC fuse blow regularly the most likely cause of the problem is the
external wiring.
Check that the external wiring is correct and without faults.
Check that none of the unit’s inputs or outputs are being overloaded.
If the power supply is of poor quality, internal circuits for suppression of voltage
transients may prematurely age the fuses and cause them to blow.
