Black Box IC108A Betriebsanweisung PDF herunterladen (Seite 108)

Advant

Smart Device (HART

) Interface User’s Guide

Chapter 5 Maintenance

5-4 3BUR 001 085R0001 REV A

5.4.1 User Repair

5.4.1.1 Board and Subrack Mounted Unit Replacement

General

In the following text the word board includes circuit boards and rack mounted units as well.

Example of such a unit is the Voltage Regulator.

It is important to understand the consequences of a board exchange on-line and how it affects

the current situation. For example:

• Replacement of a communication board type affects all channels on all the boards in a

subrack.

The system software in the Advant Controllers checks automatically that all I/O boards function

correctly. In the event of board fault, and board exchange, the board and associated signals are

marked as faulty. While the fault marking is present, the value is not updated in the data base.

The system software checks that the board is inserted and correct. If this is the case, the Fault-

indicator (LED) extinguishes (after 10 seconds), the fault marking in the data base is reset and

the board resumes its normal function.

The following headings include general instructions for replacement of circuit boards and

aspects on the handling of individual circuit boards are presented in Table 5-1.

Practical Execution

Replace faulty or suspect circuit boards and units in the following way:

1. Pay attention to safety regulations and observe all precautions before starting work.

2. Special restrictions apply to the board type. See description in Table 5-1 for other useful

information on individual board types.

3. Whenever possible, switch off the power supply to the subrack.

4. Provide access to the board/unit by loosening the board locking:

– Loosen the screws in the pull handles of boards in the controller subrack.

– The bar in front of the boards in the I/O subrack.

5. Grip the board firmly and extract the board quickly and decisively.

6. Check that the new board can replace the old:

– Make sure that the jumpering is the same as that of the old board.

7. Insert the new board carefully without reaching the rear plane contacts. Ensure that the

board slides in the guides in the subrack.

8. Push in the new board quickly and decisively.

9. Store extracted boards in envelopes of conductive plastic.

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Black Box IC108A Betriebsanweisung Seite 108