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

DI 8-Channel Card LEDs

The following table describes the LEDs for the pre-Series 2 and Series 2 8-channel DI cards (24 VDC isolated and dry contact, and 120/230 VAC isolated and dry contract).

Table: DI 8-Channel Card LEDs
LED Correct Operating Condition Fault Indication Possible Cause Corrective Action

Green - Power

Green Power/Active

  • pre-Series 2 - On
  • Series 2 Simplex -On
  • Series 2 Redundant:
    • Active - On
    • Standby - Flashing
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 pre-Series 2 and Series 2 On (continuous) 1. Controller is not scanning card. 1. Check controller operation.
2. Unit failed self-test. 2. Contact technical support.
pre-Series 2 - Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Address conflict. 2. Replace with known good card of same type; contact technical support.
Series 2 - Flashing 1. Controller is not scanning card. 1. Check controller operation.
2. Hardware error. 2. Replace card with known good card of same type; contact technical support.
Yellow - Ch.1 to Ch. 8
  • On = input > detection level.
  • Off = input < detection level.

Refer to the "Interface Specifications" section for detection levels for each DI card type.