I/O Modules Troubleshooting; Power Led Of I/O Modules - Honeywell Excel 800 LION Installation And Commissioning Instructions

I/O Modules Troubleshooting

Check if the power supply voltage level is OK and that there is no high voltage (> 24 VAC or > 40 VDC) connected to the
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inputs/outputs of the ...821, ...822, ...823 I/O modules.
Replace the problem I/O module with another module of the same kind.
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– If the problem persists, this is an indication that the problem is caused by the application or incorrect wiring.
– If the problem is solved, this is an indication that the I/O module was defective.
For troubleshooting purposes on all I/O modules the following features can be used:
•
Power LED
•
Service LED
•
Service button
In addition, a module-specific troubleshooting may be necessary.

Power LED of I/O Modules

case Power LED
1 ON
2 OFF
3 Flashing continuously
Table 74 Power LED of I/O modules
EN1B-0375GE51 R0308
Meaning
I/O module is powered
No power
If the I/O module's service LED is likewise
flashing, the I/O module is in the boot mode
Remedy
No action necessary
Check power supply
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Wait until rebooting (firmware
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download) has been completed
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Excel 800 LION