42 XFC G4 2103335 Rev AB
Figure 21 XFC
G4
6713 with Optional Key Pad
3.15 Optional Totalflow Input/Output Modules
The hardware functionality of the XSeries flow computers can be extended by using modular I/O packaged in DIN mount
enclosures.
In addition to Totalflow’s enhanced on-board input/output capabilities, the hardware functionality of the flow computer series can
be extended in a flexible way by adding modular I/O, as needed (see Figure 22). Totalflow I/O (TFIO) modules are designed to
accommodate low power, harsh environments and economical cost requirements. The system automatically recognizes the
module types and configures the I/O Scanner subsystem accordingly.
The modules are interfaced to the flow computer board by an I
2
C bus. On top of this bus, Totalflow has implemented an efficient
I/O protocol to exchange information between the modules and the circuit board. The bus operates in a master or slave mode
with the main board acting as master.
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