Instruction manual

18
Figure 12. Connecting the wires at the core processor
7. Reattach the core processor cover.
8. For wiring at the transmitter, see the transmitter Quick Reference
Guide.
9. If connecting to a direct host, you must connect the VDC wires from
the core processor to a power supply, and you must connect the
RS-485 wires to the RS-485 terminals on the host.
• If you are connecting to an I.S. barrier supplied by Micro Motion
(MVD Direct Connect installations), the barrier supplies power to
the core processor.
a. Connect all 4 wires of the 4-wire cable from the core
processor to the barrier. Refer to the barrier documentation to
identify the terminals at the barrier.
b. Ensure that there is no electromagnetic interference coupled
onto the 4 wires between the core processor and the barrier.
Power supply +
(Red wire)
Power supply –
(Black wire)
RS-485A
(White wire)
RS-485B
(Green wire)
Core processor housing internal ground screw
• For connections to earth ground when core processor cannot be grounded
via sensor piping and local codes require ground connections to be made
internally
• Do not connect shield drain wires to this terminal