Installation notes
- The CHARM 3-Wire DI Fused Injected Power Terminal Block installs on the CHARM Baseplate and holds a single Logic Solver (LS) CHARM. It provides the keying and field wiring for the LS CHARM and bussed power connections to implement dry contact inputs for isolated Discrete CHARMs. Bussed power is wired to the CHARM Address Terminal.
- The third terminal on this terminal block provides a connection for negative conductors for three wire devices.
- The terminal block's fuse protects the field wiring from short circuits.
- The fuse cannot be replaced when the terminal block is under power in a hazardous environment.
- The CHARM 3-Wire DI Fused Injected Power Terminal Block's keying mechanism sets itself to match the inserted CHARM.
- To reset the keying mechanism, remove the CHARM 3-Wire DI Fused Injected Power Terminal Block from the CHARM Baseplate, flip the terminal block 180°, and use your fingers to push the two keying posts completely in so they are sub flush to the bottom face of the terminal block. Sub flush is the neutral position. You will hear a click when the posts are in the neutral position. When the posts are in the neutral position, the terminal block can receive a different CHARM type.
- The following LS CHARMs can use the CHARM Fused Injected Power Terminal Block:
