Figure 4-1: Wiring the TPS or Discrete Output version
mA1+
HART
RS-485
PWR
TPS/DO
AA
B
RS-485 A
RS-485 B
C
E
D
B
A
A
A
A. 24 VDC
B. R
load
(250 Ω resistance)
C. HART-compatible host or controller; and/or signal device
D. R
load
(500 Ω resistance recommended)
E. Signal converter/flow computer or Discrete Input device
Note
• For operating the milliamp output with a 24V supply, a maximum total loop resistance
of 657 Ω is allowed.
• When operating the TPS or Discrete Output with a 24 VDC power supply, a maximum
total loop resistance of 1300 Ω is allowed.
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
42 Micro Motion Fork Density Meter
To Next Page
Loading...
Need help?
General
