Table of Contents
Advertisement
Installation Manual
MMI- 20032352
3
Transmitter power and I/O wiring
3.1
Options for wiring
The wiring procedure you follow depends on which electronics option you have.
Table 3-1: Wiring procedures by electronics option
Electronics option
Integral transmitter
Extended electronics
MVD Direct Connect
Integral core processor with
remote transmitter
Make sure the hazardous area specified on the sensor approval tag is suitable for the
environment in which the sensor will be installed. Failure to comply with the
requirements for intrinsic safety in a hazardous area could result in an explosion.
Fully close and tighten all housing covers and conduit openings. Improperly sealed
housings can expose electronics to moisture, which can cause measurement error or
flowmeter failure. Inspect and grease all gaskets and O-rings.
3.2
Connect 4-wire cable
3.2.1
4-wire cable types and usage
Micro Motion offers two types of 4-wire cable: shielded and armored. Both types contain
shield drain wires.
The cable supplied by Micro Motion consists of one pair of red and black 18 AWG
(0.823 mm²) wires for the VDC connection, and one pair of white and green 22 AWG
(0.326 mm²) wires for the RS-485 connection.
User-supplied cable must meet the following requirements:
Installation Manual
WARNING
NOTICE
Wiring procedure
The transmitter is already connected to the sensor. No wiring is
required between sensor and transmitter. See the transmitter
installation manual for wiring the power and signal cable to the
transmitter.
The electronics are separated from the sensor by an extender and
must be attached as described in
There is no wiring required because the physical connection
includes the electrical connection.
There is no transmitter to wire. See the Micro Motion MVD Direct
Connect Meters manual for wiring the power and signal cable
between the sensor and the direct host. Refer to
to the I.S.
barrier.
The core processor is already connected to the sensor. Connect a
4-wire cable between the core processor and transmitter. Refer
to
Connect the wires to the core processor
Transmitter power and I/O wiring
August 2019
Attach extended
electronics.
Connect power
terminals.
11
Advertisement
Table of Contents
