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F3 AIO 8/4 01
3 Product Description
HI 800 161 E Rev. 2.00
Page 13 of 56
Circuitry:
Series Resistor (R
series resistor
)
Field Clamp Terminal
Solenoid Valve 8 W, 24 VDC
Field Clamp Terminal
Series Resistor (R
diode
)
Shunt (R
shunt
)
Figure 1: Circuitry for Line Monitoring
Line monitoring range (short-circuits and open-circuits)
Protective circuit with short-circuit
Examples of how to configure line monitoring for the digital output DO (circuit with solenoid
valve 8 W 24 VDC):
Resistance values:
Resistor: R
series resistor
1.6 k
Solenoid valve resistance:
R
solenoid valve
75
Shunt: R
shunt
10
Table 5:
Examples of Line Monitoring - Resistance Values
Voltage values:
Transmitter voltage:
26.4 V
Output voltage DO during normal operation:
24 V
Output voltage DO with a short-circuit:
26.8 V
Voltage drop on the solenoid valve:
21 V
Switching voltage of the Z-diode:
12 V
Table 6:
Examples of Line Monitoring - Voltage Values
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