Chapter 5 Flow meter operation method
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15
Figure 12.Schematic diagram of internal wiring
Table 4
24V+
（
I+
）
24V Power + (c)
24V-
（
I-
）
24V Power-(current -)
Vout
Voltage
F_V-
Pulse output power supply-
F_V+
Pulse output power
Fout
Pulse output
FE
Ground
B
Modbus communication line B
A
Modbus communication line A
Pulse output wiring diagram:
When there is no sampling resistance inside the system, F_V+ is connected to the
positive pole of the power supply, F_V- is connected to the negative pole of the
power supply, and Fout is connected to the pulse signal;
When there is a sampling resistor inside the system, F_V+ is connected to the
