SMAR FI303, Руководство по эксплуатации, техническому обслуживанию и инструкциям

Страница: 43 / 54

Section 4
4.1
MAINTENANCE PROCEDURES
General
SMAR
FI303
Fieldbus to Current Converters are extensively tested and inspected before
delivery to the end user. Nevertheless, during their design and development, consideration was
given to the possibility of repairs by the end user, if necessary.
In general, it is recommended that the end-user do not try to repair printed circuit boards.
Instead, he should have spare circuit boards, which may be ordered from SMAR whenever
necessary.
TROUBLESHOOTING
SYMPTOM PROBABLE SOURCES OF TROUBLE
NO QUIESCENT URRENT
Converter Fieldbus Connections
Check wiring polarity and continuity.
Power Supply
Check power supply output. The voltage at the
FI303
Fieldbus terminals must be between 9 and 32 VDC.
Electronics Circuit Failure
Check circuit boards for defect by replacing them with spare ones.
NO COMMUNICATION
Network Connection
Check network connections: devices, power supply, couplers, links and terminators.
Converter Configuration
Check configuration of communication parameters of converter.
Network Configuration
Check communication configuration of the network.
Electronics Circuit Failure
Try to replace the converter circuit with spare parts.
INCORRECT OUTPUTS
Output Terminals Connection
Check wiring polarity and continuity.
Power Supply
Check power supply output. The voltage at the output terminals of
FI303
must be between 3 and 45 VDC.
Load Resistance
Load resistance must be between 0 and 2000
Ω
. Note that the maximum value depends on output power
supply voltage.
Calibration
Check calibration of converter.