Through the 8-Wide I/O Carrier, 24 VDC field power can be separately delivered to the cards installed in odd numbered slots and to the cards installed in even numbered slots. In redundant applications, the cards installed in the odd numbered slots are the primary cards and the cards installed in the even numbered slots are the secondary cards.
- Connect fused 24 VDC bulk power to the terminals on the top left of the carrier (- +) to provide field power to the cards installed in slots 1, 3, 5, 7. In redundant applications, these are the primary cards.
- Connect fused 24 VDC bulk power to the terminals on the top right of the carrier (- +) to provide field power to the cards installed in slots 2, 4, 6, 8. In redundant applications, these are the secondary cards.