Pressure control connection
Pressure measurement
The pressure can be measured using the following sensors:
- Pressure switch (only Control EC-WP1 ...)
- The pressure switch acts as a normally open contact (NO):
- Pressure switch open: Pump on
- Pressure switch shut: Pump off
- Analogue pressure sensor 4 to 20 mA
Pump dry-running protection
The level for dry-running protection can also be monitored via the following sensors:
- Float switch
- Electrode
- Connection is protected against reverse polarity!
The input acts as a normally open contact (NO):
- Float switch open or electrode non-immersed: water level below min. level
- Float switch shut or electrode immersed: water level sufficient
The terminals are fitted with a converter bridge at the factory.
Sensor connection
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
- Do not apply external voltage (connect potential-free).
Insert the connection cable laid by the customer through the threaded cable glands and secure it. Connect the wires to the terminal strip according to the connection diagram. For more information on the control modes and how they work, as well as the individual terminal numbers, please refer to the relevant description:
- “Constant pressure control p-c” control mode: 1x pump, with pressure switch
- “Constant pressure control p-c” control mode: 1x pump, with pressure sensor
- “Constant pressure control p-c” control mode: 2x pumps, with pressure sensor
Use of electrodes
Electrodes can be connected in the following ways:
A | 1x electrode with reference earth on the tank |
B | 2x electrodes with reference earth via the electrode |
