9.2.3.1 Suction lance with 2-stage level switch
Electrical interface
Data Value Unit
Voltage with open contacts 5 V
Input resistance 10 kΩ
Control via:
n potential-free contact (load: 0.5 mA at 5 V) or
n semiconductor switch (residual voltage < 0.7 V)
Pin Function 3-wire cable
1 Earth GND black
2 Minimum pre-warning blue
3 Minimum limit stop brown
9.2.3.2 Suction lance with continuous level measurement
Electrical interface
Pin Designation Function
1 5 V supply
Sensor + RX
5 V (4.85 V…5.25 V DC) feed to the
sensor and RX communication inter‐
face (viewed from sensor). Interrup‐
tion to the power supply for a commu‐
nication command max. 10 ms.
2 GND Reference potential
3 Sensor TX TX communication interface (viewed
from sensor)
The cable between the suction lance and pump is an adapter cable
- with 5 pins at the suction lance end and 3 pins at the pump end.
9.2.4
"Metering monitor" terminal
This terminal has no function in the DFXa.
9.2.5
"Hose rupture indicator" terminal
There is an option to connect a hose rupture indicator.
Plug cable from hose rupture indicator into “Hose rupture indicator" ter‐
minal.
Fig. 14: Assignment on pump
Fig. 15: Assignment on cable
Fig. 16: Assignment on pump
Fig. 17: Assignment on cable
Installation, electrical
34
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