4.5.1 Wire to a signal converter in an explosion-proof or non-
hazardous area
Use this procedure to wire to a signal converter/flow computer in an explosion-proof/
flameproof or non-hazardous area.
Figure 4-4: Wiring to a signal converter/flow computer in an explosion-proof/
flameproof or non-hazardous area
mA1+
HART
RS-485
PWR
TPS
AA
B
24 VDC
RS-485 A
RS-485 B
A
B
A. Active HART host
B. Active signal converter/flow computer
CAUTION
• To meet the EC Directive for Electromagnetic Compatibility (EMC), use a suitable
instrumentation cable to connect the meter. The instrumentation cable should have
individual screens, foil or braid over each twisted pair, and an overall screen to cover
all cores. Where permissible, connect the overall screen to earth at both ends (360°
bonded at both ends). Connect the inner individual screens at only the controller
end.
• Use metal cable glands where the cables enter the meter amplifier box. Fit unused
cable ports with metal blanking plugs.
Wiring
Installation Manual
May 2019 MMI-20020989
50 Micro Motion Fork Density Meter
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