AO 16-Channel 4-20 mA HART Plus card LEDs

Table: AO 16-Channel 4-20 mA HART Plus card LEDs
LED correct operating condition Fault indication Possible causes and corrective action
Power/Active On (green)
  • Continuous green for the active card
  • Flashing green for the standby card
Off System power is not supplied to the card due to a possible line power problem. Check the power connections.
Internal fault. Contact technical support.
Error-Off Red (continuous)
Controller is not scanning the card. Check the controller operation.
Card failed self-test. Contact technical support.
Redundant card (red flashing) Controller is not scanning the card. Check the controller operation.
Hardware error. Replace card with known good card of same type; contact technical support.
Simplex card (red flashing) Controller is not scanning the card. Check the controller operation.