LEFM 3xxCi User Manual
IB1406 Rev 12
Section 7
Page 47
February 2017
will not run if the setup file is corrupted). A bad setup file is annunciated on the display and in the
Modbus registers. If the setup file is acceptable, then review the power supply voltages on the
MXR and CTC (via Modbus registers). If these power supply values are within specification, then
contact Cameron’s Measurement Systems division.
7.3
Circuit Board Replacement
The transmitter comprises three basic subassemblies. Refer to Table 7.1 for a description of each
subassembly’s components.
Table 7.1 Circuit Boards
Circuit Board Name
Description/Function
Input/output and Power Supply
(IOP)
Provides galvanically isolated digital outputs, analog output/input and communications. Converts 24 VDC power to
internal voltages, which are passed to the CTC/MXR to power the electronics.
Provides fused connection to power (Fuse F25).
CTC and Display
Performs all flowmeter processing. Contains the display and communicates with the MXR and IOP.
Acoustic Board (MXR)
Interfaces with transducers, excites and receives acoustic signals.
Figure 7.1 Transmitter Components
