Wiring Diagrams - ABB MAG-X 3000 Series Instruction Manual

INSTRUCTION MANUAL 10DX3111A&G Sizes 14 - 24 Inches

5.1 Wiring Diagrams

All Flowmeter intraconnection wiring is terminated at the CMC & ZERO PC board assemblies located
in the base of the meter housing.
The CMC & ZERO PC Assemblies provide several functions. These include:
1. Establishing interconnections between the Flowmeter internal wiring and the
Signal Converter.
2. Permitting factory adjustment of meter capacity values to a fixed value for each
nominal size Flowmeter.
3. Permitting factory adjustment of Flowmeter zero.
4. Establishing proper wiring connections for remotely mounted Signal Converters.
The Flowmeter provides two output signals to the associated Signal Converter:
• an electrode signal that contains the flow rate information
• a signal which is proportional to the magnet excitation current
Model 10DX3111A Primary provides a reference signal to the Converter via the magnet coil drive
circuitry, as discussed above. In Model 10DX3111G, the magnet coil drive circuitry is contained in the
M2 Signal Converter and the reference signal is produced in the remote Converter. Internal wiring
diagrams are shown in Figures 5-1 and 5-2 respectively.
5-2