Specifications

Analog Output Modules
336
31007715 6/2008
Indications The following table defines the meaning of the two LEDs (where an empty cell
indicates that the pattern on the associated LED doesn’t matter).
RDY ERR Meaning What to Do
off off The module is either not receiving logic
power or has failed.
Check power.
flicker* off Auto-addressing is in progress.
on off The module has achieved all of the
following:
z it has power
z it passed its confidence tests
z it is operational
on on The watchdog has timed out. Cycle power; restart the
communications.
on flicker* A broken wire is detected. Check wiring.
blink 1** The module is in pre-operational mode.
flicker* Loop power is absent. Check power
blink 1** A nonfatal error has been detected. Cycle power; restart the
communications.
blink 2*** The island bus is not running. Check network connections;
replace NIM.
* flicker—The LED flickers when it is repeatedly on for 50 ms then off for 50 ms.
** blink 1—The LED blinks on for 200 ms then off for 200 ms. This pattern is repeated until
the causal condition changes.
*** blink 2—The LED blinks on for 200 ms, off for 200 ms, on again for 200 ms then off for
1 s. This pattern is repeated until the causal condition changes.
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