Xylem Lowara SM30 Manual De Instalación, Funcionamiento Y Mantenimiento página 33

4.1.5 Group F, level control
N° Code Description
22 HIGH High level probe / float / minimum pressure switch input
23 LOW Low level probe input
24 COM Probes / float / minimum pressure switch common circuit
Characteristics:
Voltage 3.6Vp-p
4.1.6 Group G, analog inputs/outputs
N° Code Description
25 GND_A Sensor cable screen connection electronic ref.
26 Out_A Analog signal output
27 AI1 Sensor 1 active value input
28 AI2 Sensor 2 active value input
29 PWR_A Sensor power supply +13.5 Vdc
Characteristics:
Voltage 0-11 V, accuracy 0.3%;
Current input 0-22 mA, accuracy 0.3%, protection against short circuit.
Maximum input voltages = 30 Vdc.
4.1.7 Group H, Power supply
N° Code Description
30 PE Earth connection
31 0Vac Board power supply
32 24Vac Board power supply
Characteristics:
Voltage 24Vac +/-10%
Frequency 50/60Hz
4.2 View of bypass jumpers
The bypass jumpers bypass the electronics, directly activating the pump control contactors without
any regulating control.
They are used in an emergency, when the electronic board is out of use and it is necessary to ensure
pump operation.
OPEN position = The pump contactors are deactivated.
CLOSE position = The pump contactors are permanently activated and no regulating control is
carried out (to be used only in emergency situations).
SOFTWARE position = pump contactors controlled by the electronic board.
The default position of the jumpers is SOFTWARE.
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