The DeltaV system uses system power supplies and bulk power supplies to power the controllers, CIOCs, and I/O subsystems.
In a DeltaV system with S-series hardware, power is distributed from bulk power supplies to system power supplies and then to controllers and the I/O subsystems along the LocalBus. The LocalBus is the internal power and communications bus running through the connected S-series carriers. The LocalBus supports up to 15 A. System power is shared along the length of the LocalBus.
Field power for S-series I/O can be individually delivered to each card or separately delivered to primary and redundant cards through connectors on the S-series 8-Wide I/O Carrier. Refer to the DeltaV S-series and CHARMs Hardware Installation manual for step-by-step instructions on how to deliver field power to individual cards and to redundant cards. Refer also to the specifications for the 8-Wide I/O Carrier in this manual for an image showing the field power connectors on the carrier.
The CHARM I/O Carrier accepts redundant 24 VDC from primary and secondary bulk power supplies connected to two 24 VDC input terminals on the carrier. This power is used by redundant CHARM I/O Cards (CIOCs) and is available to each CHARM to power field devices. In addition, the CIOC powers a redundant 6.3 VDC bus that provides internal power for each CHARM.
The DeltaV system uses system power supplies and bulk power supplies. System power supplies power DeltaV controllers and I/O subsystems. Bulk power supplies power system power supplies, CIOCs, and field devices.