TechnipFMC ALIV-QT-XP, Installation And Maintenance Manual

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Issue/Rev. 0.1 (2/20) ║ MN06201 • Page 31
AccuLoad IV Installation and Maintenance Manual General Wiring Notes
• Dual Channel with Integrity – Four pulse inputs receive two pulses streams and
two inverted pulse streams from the meter. This allows the AccuLoad to detect the
direction of flow and meter connection problems including the case where both
pulse streams are inactive.
Regardless of the mode selected, to qualify as a valid pulse, the signal on the input to
the AccuLoad must be less than one volt for a minimum of 80 microseconds and then
transition to greater than 5 volts and remain above 5 volts for a minimum of 80 micro -
seconds as shown below.
Figure 15. Meter pulse requirements
7.5. Analog I/O Modules
The A4M board has six slots into which modules can be inserted to interface to analog
sensors or actuators (ie. Pressure sensor, valve). Typically, these modules are installed
at the factory according to the requirements of the installation but changes and
replacements of these modules may be done in the field. The analog I/O points are fully
configurable and can be inputs such as temperature or pressure or outputs such as analog
valve control. There are 5 different types of analog interface modules available which are
inserted into a socket on the A4M board as follows:
Table 14. Types of analog I/O modules
Analog Module Type Electrical Connection Function(s)
RTD Four-wire 100 ohm RTD Temperature input
CRI 4-20 mA Input Temperature
Pressure
Density
General Purpose Input
CRO 4-20 mA Output Analog valve control
Flow rate output
General Purpose Output
VTI 1-5 VDC Input Temperature
Pressure
Density
General Purpose Input
VTO 1-5 VDC Output Analog valve control
Flow rate output
General Purpose Output