3
Wiring
Topics covered in this chapter:
•
Terminals and wiring requirements
•
Wire power and outputs in a HART single-loop environment
•
Wiring to external devices (HART multidrop)
3.1
Terminals and wiring requirements
Three pairs of wiring terminals are available for transmitter outputs. A fourth pair is used
for power wiring. These outputs vary depending on your transmitter output option
ordered. The mA outputs require external power, and must be connected to an
independent 24 VDC power supply.
The screw connectors for each output terminal accept a maximum wire size of 14 AWG
(2.5 mm
2
).
Important
•
Output wiring requirements depend on whether the meter will be installed in a safe area or a
hazardous area. It is your responsibility to verify that this installation meets all corporate,
local, and national safety requirements and electrical codes.
•
If you will configure the meter to poll an external temperature or pressure device, you must
wire the mA output to support HART communications. You may use either HART/mA single-
loop wiring or HART multi-drop wiring.
Wiring
20
Micro Motion Heavy Fuel Viscosity Meter
