Bentley 3500 Card Holder
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On the Bentley 3500 33 relay card of the syngas compressor unit, the red lights for the second and third channels have suddenly turned on (they were not lit before); however, it seems that this does not affect the operation of the system, and no alarm messages are displayed on the control station’s alarm panel. . . What’s going on? Note: In the other system, no red lights appeared on this card while it was in operation. After shutdown for maintenance, two channels on this 33 relay card also showed red lights (not the same channels as mentioned above), but once operation resumed, the red lights on those channels went out. . .
When the relay channel is in alarm mode, the indicator light comes on, indicating that the channel is alarmed. It’s not clear whether an analog signal is being sent; the relay is activated via card number 33 to cause the system to shut down. It’s possible that the analog signal has reached the set alarm level, but not yet the level that triggers shutdown. The red light turns on, but this does not affect operation