SMAR FRI303, Инструкция по эксплуатации

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Section 4
4.1
MAINTENANCE PROCEDURES
General
SMAR FRI303 is extensively tested and inspected before delivery to the end user. Nevertheless,
during their design and development, consideration has been given to the possibility of repairs by
the end user, when necessary.
In general, it is recommended for the end user not to try to repair printed circuit boards. Instead,
spare circuit boards should be available, which may be ordered from SMAR when necessary.
TROUBLESHOOTING
SYMPTOM PROBABLE SOURCES OF TROUBLE
NO QUIESCENT CURRENT
Connections:
Check wiring polarity and continuity.
Power Supply:
Check power supply output. The voltage at the FRI303 Profibus-PA terminals must be
between 9 and 32 Vdc.
Electronic Circuit Failure:
Check the boards for defects by replacing them with spare ones.
NO COMMUNICATION
Network Connections
Check the network connections: devices, power supply, and terminators.
Network Impedance
Check the network impedance (power supply impedance and terminators).
Controller Configuration
Check configuration of communication parameters of the controller
Physical address
Check the device address and make sure the configuration at the Profibus Master has
the same address.
Network Configuration
Check communication configuration of the network.
Electronic Circuit Failure
Check the boards for defects by replacing them with spare ones.
INCORRECT OUTPUTS
Output Terminals Connection
Check wiring and continuity.
Switching Current and voltage for Outputs
Check limits for the connected load according to the model for relay connections.
Output Fuse
Check the condition Of the output Fuses by removing the main electronic board.
Disassembly Procedure
See Figure 4.1 – FRI303 Exploded View. Make sure to disconnect the power supply before
disassembling the converter.
To remove the circuit boards ( 3 and 4 ) and display ( 3 ), first loosen the cover locking ( 5 ) on the
side not marked “Field Terminals”, then unscrew the cover ( 1 ).
WARNING
The boards have CMOS components, which may be damaged by electrostatic discharges.
Observe correct procedures for handling CMOS components. It is also recommended to store the
circuit boards in electrostatic-proof cases.
Loosen the two screws that anchor the display and the main circuit board. Gently pull out the
display, and then the main board. To remove the input board, first unscrew the two screws that
anchor it to the housing, and gently pull out the board.