SFA ZPS 2.3 Manual De Instalación página 21

4.3.3 Connection of a single-phase Motor with external capacitor
As for 230V pumps, a bridge is required between N - L2 in the mains connection
Pump
1
U1 U2 Z1
C
1~
P1
4.4 CONNECTION OF THE EXTERNAL SENSORS
The external sensors are connected by means of the terminal strip on the upper circuit board.
The active sensor can be selected in the menu "level control" and "therm. malfunction".
De-energized
open
Signal contacts
If the thermostatic switches TH2 and TH4 are not necessary, bridges have to be inserted on those contact points. The thermo-
static switches TH1 and TH3 can be deactivated via the menu therm. malfunction.
The floating switches have to close when they are floating on the surface. The floating switches have to be connected floatingly.
The required signal voltage is generated in the control system and amounts to 5 V.
Assignment of the float switches:
SWN1 = pumps 1 and 2 off
SWN2 = pump on
SWN1 = peak load 2nd pump switched on
SWHW = high water alarm
DANGER
 For the usage in explosion-prone areas, use either floating switches with the corresponding permission,
or intrinsically safe cut-off relays.
 The external sensor has to supply a measurement current between 4 and 20 mA. The final value of 20 mA
can be adjusted in the menu, so the indication may occur in cm.
Small-scale
Mains connection
Pump
De-energized
closed
Floating
consumer
Pump
21
Pump
2
U1 U2 Z1
C
1~
P2
Use the 20 V output for
external 4-20 mA sensor only
EN