The LED indicators on the I/O modules provide power activity status, locate indicators, fault conditions, and host port activity.
The following figure shows the I/O module LEDs.
Figure 1 I/O module LEDs 
- Legend
1 Fault and locate indicator 3 Host port activity indicator 2 Power and OK indicator
The following table provides status information on the I/O module LEDs.
Status |
Fault and locate indicator (amber) |
Power and OK indicator (green) |
Host port activity (green) |
|---|---|---|---|
The status is normal. |
Off |
On |
Not applicable |
An I/O module fault is present. |
On |
Off |
Not applicable |
The I/O module is located. |
Flash |
On |
Not applicable |
A vital product data (VPD) error is present. |
Not applicable |
Flash |
Not applicable |
The host port is not connected. |
Not applicable |
Not applicable |
Off |
The host port is not active. |
Not applicable |
Not applicable |
On |
The host port activity is normal. |
Not applicable |
Not applicable |
Flashing |