Emerson 375 User Manual page 68

Fieldbus Functionality
4-6
Three terminals for the lead set are on the top of the 375
Field Communicator. The lead set and terminals let you
connect the 375 Field Communicator to a device. Each
red terminal is a positive connection for its protocol. The
black terminal is a common terminal shared by both
protocols. An access door ensures only one pair of
terminals is exposed at any one time; see Figure 4-2.
Several markings indicate which pair of terminals is for
which protocol.
Figure 4-2. Fieldbus terminal access door
Fieldbus Terminal Markings