Connect power to LS CHARM I/O

Redundant 24 VDC power is delivered from bulk power supplies to LS CHARM I/O through the CHARMs Smart Logic Solver (CSLS) Carrier. Emerson recommends connecting the bulk power supply to a surge suppression/filter device.

Note

In most cases, removing a CHARM from the CHARM baseplate removes power from any connected field device. However, CHARM type, terminal block type, and external power distribution can affect whether removing the CHARM removes power from a field device.

Figure: Powering the CHARMs Smart Logic Solver Carrier


For this procedure, it is assumed that redundant bulk 24 VDC power supplies and surge suppression/filter devices are already installed.

  1. Connect the AC power that is feeding the bulk power supplies to surge suppression/filter devices.
  2. Connect the bulk power supply to the power terminals on the CSLS Carrier.
  3. Ground the bulk power supplies as shown in the image.