How do I configure the iO1000 NAC circuits for Class A wiring instead of the default Class B?
The iO1000 is Class A Ready and does not require an expansion card for Class A wiring (Page 6) [1].
To configure this, you must program the NACs in pairs (one odd and one even) and adjust the physical jumpers on the main circuit board.
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Press the Menu button, select Programming, then Advanced Program (Level 2).
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Choose Panel Configuration and then Panel NAC (Page 136) [1].
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Select the NAC number and change the Class setting from Class B to Class A (Page 139) [1].
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Program the second NAC in the pair (e.g., NAC 2 if you started with NAC 1) to the same class and output type (Page 28) [1].
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Set the physical NAC jumpers on the circuit board to the A position to match your programming (Page 28) [1].
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Select Save to confirm the changes; the panel will sound a long beep for confirmation.
Note: If NAC 1 and 2 are configured for Class A, NAC 3 and 4 are automatically used for the return and are no longer available for independent use (Page 136, 139) [1].