Electrical Connection Of Level Indication - Grundfos RSL Montage- Und Betriebsanleitung

4.2 Electrical connection of level indication

In order to monitor the filling level of the container, a two-step
level indication (low-level signal, tank-empty signal) can be
connected to the pump or other downstream devices.
Observe the manuals of the downstream devices.
Note
4.2.1 Signal connection with round plug
All SMART Digital pumps and the digital dosing pump DDI 222
are connected with round plugs.
4 3
1 2
Fig. 5 Signal connection with round plug
Level signal: low-level and tank-empty
Function
Low level
Tank empty
4.2.2 Signal connection with flat plug
The foot valves and suction lances are supplied with round plugs.
An adapter is required for connection to the dosing pumps
DMX 221 and DMH with AR control.
Product number: 96635010
Fig. 6 Flat plug
10
3
2
GND
1
Pins
1/white 2/green 3/brown
X GND
X GND
4.2.3 Changing the contact type
Suction lances and foot valves with two-step level indication have
two signal outputs. Both are factory-set to NO contact type.
The symbol is on the float switch top (see fig. 7).
• The symbol that is visible from above shows the switch mode
"float switch above".
• The symbol that is visible from below shows the switch mode
"float switch below".
The contact type can be changed from NO to NC by turning the
float switch upside down (180 °). A cable break will provoke a
tank-empty signal.
Reversing the float switch:
1. Remove the float switch sidewards
2. Turn the float switch upside down (180 °) and attach it. Make
sure that the NC symbol at the float switch points upwards.
3. Adjust the signal inputs of the downstream devices (pump)
accordingly
Observe the manuals of the downstream devices
Note
(pump).
1
Fig. 7 Changing the contact type
Pos. Description
Float switch NO (normally open)
1
contact
Float switch NC (normally closed)
2
contact
2
Symbol