Lorentz PS2-150 Series Manual For Installation And Operation page 29

7.6.3 Pump Accessories Wiring
Terminals 1 and 2
To protect the pump from being damaged by dry running
connect a suitable source low protection switch to terminal
1 and 2. Every pump system must be equipped with dry run
protection. If dry run protection is not needed, add a jumper
wire between these two terminals.
CAUTION - Never let the pump run dry.
Dry running will damage the pump and
void the warranty. LORENTZ requires a dry
run protection for every pump system.
Terminals 3 and 4
Connect any kind of external switch for remote control of
the controller. To run the pump the switch must be closed
(NC). If no switch is used the terminals No. 3 and 4 have to
be connected with a jumper cable (factory setting).
Terminals 5 and 6
Install a water meter in the pipeline and connect it to
terminal 5 and 6. The output of the water meter must be
an impulse signal. The time between two impulses must not
exceed 5 minutes. The DataModule can handle up to 10
impulse per second. Select a water meter appropriate for the
expected flow. The flow can be viewed with the LORENTZ
PumpScanner software.
Terminals 7 and 8 / 9 and 10
Any suitable sensor for 24VDC supply voltage, current
(signal) range of 4 –20 mA and load impedance of 100Ω
can be connected, e.g. LORENTZ pressure sensor, LORENTZ
liquid level sensor. The sensor must then be configured in
PumpScanner.
Controller Installation
Terminals 11 and 12
This is a potential-free signal output contact that can be
configured in PumpScanner to control third party devices. It
is rated for: 24 VAC, 24 VDC, 1 A.
Terminals 13, 14 and 15
Connect a water sensor to detect the presence of water, this
is usually installed on the suction side of surface pumps for
dry run protection. If no water sensor is connected a jumper
wire must be installed between terminals 14 and 15 (factory
setting). The maximum allowed current for sensor supply is
20 mA.
Terminals 16 and 17
Connect a LORENTZ 1.5Wp Sun Sensor module module.
This PV module is used to measure the solar irradiation and
allows you to set irradiation dependent START / STOP values
for the pump. These settings can only be done via LORENTZ
PumpScanner.
CAUTION – Only connect a suitable sensor
to terminals 7 and 8 / 9 and 10 / 13, 14 and
15. Never create a short circuit. Observe
the polarity of the pressure sensor.
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