Emerson DeltaV™ Electronic Marshalling I/O Terminal Block Options

I/O Terminal Block Options

• There are six different I/O terminal blocks available to

meet the wiring needs of field signals

• Standard Terminal Block

• Fused-Injected-Power Terminal Block

• 3-wire DI Fused Injected-Power Terminal Block

• Relay Output Terminal Block

• Thermocouple / mV Terminal Block

• 3-wire AI Fused Injected Power Terminal Block

The Standard Terminal block can be used with all CHARM

types. For traditional wiring of field instrumentation,

the CHARMs provide loop power through the internally

distributed 24V DC field power. Refer to specific CHARM

specifications for wiring information.

The Fused-Injected-Power Terminal block, the 3-wire

DI Fused-Injected-Power Terminal block, and the 3-wire

AI Fused Injected Terminal block includes a 2A field

replaceable fuse. The 3-wire DI Fused-Injected-Power

Terminal block is designed to be used with all isolated

discrete Input CHARM types, while the Fused Injected

Power Terminal block is designed to work with all Isolated

discrete Output CHARM types, the 3-wire AI Fused

Injected Power Terminal block is used with AI 4-20mA

HART CHARM type creating a system-powered circuit that

can deliver up to 1 amp (DC) to the field.

Each baseplate has a local power bus that can be

connected to 24V DC or 120/230V AC through the injected

power input terminals, located on the Address Plug

terminal block. Both, the fused-injected power Terminal

Block, the 3-wire DI fused- injected power Terminal Block,

and the 3-wire AI Fused Injected Terminal block connect to

this power bus to provide system power to the field circuit

through the isolated CHARM. You can combine isolated and

system powered circuits on the same baseplate, however, all

system powered channels on a baseplate share the same power source.