English (GB)
9
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 con-
nected to the pump or other downstream devices.
4.2.1 Signal connection with round plug
All SMART Digital pumps and the digital dosing pump DDI 222
are connected with round plugs.
Fig. 5
Signal connection with round plug
Level signal: low-level and 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
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 floater top (see fig. 7).
• The symbol that is visible from above shows the switch mode
"floater above".
• The symbol that is visible from below shows the switch mode
"floater below".
The contact type can be changed from NO to NC by turning the
floater horizontally by 180 °. A cable break will provoke a
tank-empty signal.
Reversing the floater:
1. Remove the floater sidewards
2. Turn the floater horizontally by 180 ° and attach it. Make sure
that the NC symbol at the floater points upwards.
3. Adjust the signal inputs of the downstream devices (pump)
accordingly
Fig. 7
Changing the contact type
Note
Observe the manuals of the downstream devices.
TM
04
84
48
45
11
Function
Pins
1/white
2/green
3/brown
Low level
X
GND
Tank empty
X
GND
TM0
4
844
9 451
1
2
1
3
GND
3
4
1
2
Note
Observe the manuals of the downstream devices
(pump).
TM
04
84
51
1
11
2
Pos.
Description
Symbol
1
Floater NO (normally open) contact
2
Floater NC (normally closed) contact
1
2