Checking Out and Troubleshooting Your DeltaV System > Checking Out Your System > Step 3. Checking the LED Indicators on Each Device

Isolated Input Card LEDs

The following table describes the LEDs for the Series 2 Isolated Input card.

Table: Series 2 Isolated Input Card LEDs
LED Correct Operating Condition Fault Indication Possible Cause Corrective Action
Green – Power On Off 1. System power is not supplied to unit. Possible line power problem. 1. Check supply power and connections.
2. Internal fault. 2. Contact technical support.
Red – Error Off On (Continuous) 1. Controller is not scanning card. 1. Check controller operation.
2. Unit failed self-test. 2. Contact technical support.
Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Address conflict. 2. Replace card with known good card of same type; contact technical support.