Connection of signal transmitter for level control device
DANGER
Risk of explosion due to incorrect connection!
If the connected signal transmitter is installed in an explosive atmosphere (Ex zone), there is a risk of explosion due to incorrect connection:
- Do not connect electrode in an explosive atmosphere (Ex zone)!
- Connect the float switch using an Ex cut-off relay!
- Connect level sensor via a Zener barrier!
- Observe the section on explosive atmospheres in the appendix.
- Connection must be carried out by a qualified electrician.
CAUTION
Do not apply external voltage!
An external voltage which is applied destroys the component.
The level can be measured via the following signal transmitters:
- Level sensor
- Dynamic pressure bell
- Only “IPS” version!
- Float switch
- Electrode
- Only Control EC-L1 ... and EC-L2 ...
- Hardware version 2 or higher
- Connection is protected against reverse polarity!
- Level monitor
Insert the connection cables laid by the customer through the threaded cable glands and secure. Connect the wires to the terminal strip according to the connection diagram. Use the terminal number shown in the connection overview on the cover.
Float switch or electrode
| Level, “All pumps Off” |
| Level, “Pump 1 On” |
| Level, “Pump 2 On” |
Level sensor
- Connection load: 4 ... 20 mA
- Do not connect active level sensors.
Dynamic pressure bell
10 | Dynamic pressure bell, pressure connection |
- Connection load: 0 ... 250 mbar
- Vent the dynamic pressure bell after each drainage process.
- If the dynamic pressure bell cannot be readily ventilated, vent the dynamic pressure bell with a compressor (bubbling-through system). Venting can take place continuously or periodically.
- Loosen and unscrew the union nut from the discharge connection.
- Insert a union nut on the pressure hose of the dynamic pressure bell
- Push the pressure hose onto the pressure connection as far as it will go.
- Screw the union nut back onto the pressure connection and tighten it to fasten the pressure hose.