ABB S800 I/O User Manual page 111

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Replace faulty or suspect power supply module in the following way:
For single or parallel operation do steps 1, 2 and 4 to13.
For redundant configuration do steps 1 to 14.
1. Read
2. Check that the new module can replace the old.
3. Switch off the output from the module (only redundant configuration).
4. Switch off input power to the module.
5. Disconnect the wires.
6. Unmount the module by loosening the module locking.
7. Mount the new module.
8. Connect the input wires.
9. Switch on input power to the module.
10. Perform a function test on the new module.
11. Switch off input power to the module.
12. Connect the output wires.
13. Switch on input power to the module.
14. Switch on the output from the module (only redundant configuration).
3BSE 020 923R101
Section 2.2.1, Safety
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Regulations.
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