Emerson Exchange 365

In the past, 3-wire Analog (HART based) and 3-wire Discrete Field Devices were not directly connectable to an I/O Card nor to a CHARM Solution.

With the help of the 24VDC Power CHARM, 3-wire Analog Field Devices like a Gas Detectors, can now be connected directly to a CHARM Solution by getting the Power from the 24 VDC Power CHARM, while the mA Loop is wired back to the AI 4-20mA HART CHARM. The 24VDC Power CHARM does not only provide the power through the CHARM Fused Injected Power Terminal Block, it also monitors the Voltage going out to the Field Device, so a broken Fuse can be detected.

For 3-wire Discrete Field Devices, like proximity switches, a new Terminal Block has been developed, called the CHARM 3-Wire DI Fused Injected Power Terminal Block, to be able to land all wires from the proximity switch straight on the Terminal Block. This new Terminal Block also has a Fuse onboard and can be combined with all existing Isolated CHARM Types like:

- DI  24 VDC isolated CHARM

- DI 120 VAC isolated CHARM

- DI 230 VAC isolated CHARM

Watch out for the Electronic Marshalling Product Datasheets to see all the Detail