Redundant 24 VDC bulk power is distributed to the CHARMs Smart Logic Solver (CSLS) Carrier to power the CSLS and the CSLS Power Modules and to the SZ Controller Carrier or the Dual Universal Safety Carrier to power the SZ controller.
The Power Modules supply redundant 6.3 VDC power for 96 LS CHARMs, the maximum number of LS CHARMs supported by a redundant CSLS. The CSLSs receive redundant 24 VDC power through connectors on the CSLS Carrier. The carrier busses this 24 VDC power to the CHARM Baseplates to provide redundant 24 VDC power to the field circuits.
Some isolated LS CHARMs may require separate field power from 24 VDC or 120/230 VAC power sources. These LS CHARMs can be installed in the CHARM Fused Injected Power Terminal Block to implement high-side outputs and dry contact inputs for isolated discrete LS CHARMs.
For installations with a significant number of isolated LS CHARMs, the baseplates provide an internal power bus, called the injected power bus, that supports 24 VDC or 120/230 VAC. This bus receives power through the CHARM Address Terminal. Individual LS CHARMs can connect to this bus by using a Fused Injected Power Terminal Block. Field power is connected once at the CHARM Address Terminal and then bussed to any LS CHARM installed in a Fused Injected Power Terminal Block to power the LS CHARM's field circuits.
Refer to the specification for each LS CHARM for its input power requirements. Refer also to the S-series and CHARMs Hardware Reference manual for more information on power in a DeltaV system.