SFA Control Box ZPS 1.3 Manual De Funcionamento página 19

Connection of TH1 only:
TH2
TH1
TB TB
1 2
Connection of TH2 only:
TH1
TH2
TB TB
1 2
NOTE
The deactivation of TH1 by a bridge can be replaced by a deactivation from the software: in the menu "Therm. fault", choose "is
deactivated". See 6.2.1 Parameter settings.
4.2.5 Signal contacts
Four potential-free normally open (NO) signalling contacts are freely programmable: see their location in 4.2.1 Locations overview.
They can be associated with an event so that they close when the event occurs.
In case of power failure, the contacts 1 and 2 are opened and the contacts 3 and 4 are closed.
4.2.6 External sensors connection
The use of external sensors (floats or other type of external sensor) is possible if the internal pressure sensor is not used.
Connect the external sensors to the locations indicated below:
I O
For settings, indicate the active sensor type in the "Level controller" menu (see 6.2.1 Parameter settings).
The signal voltage on the float inputs is 5 V.
NOTE
The level is constantly evaluated at the input of the alarm float switch (SWHW), independently of the selected level sensor. It is
thus possible to evaluate 2 different alarm levels by 2 different sensors. Set the alarm float to a higher level than the other sensor
used (see 6.2.1 Parameter settings).
DANGER
Ö For the usage in explosion-prone areas, use either floating switches with the corresponding permission, or
intrinsically safe cut-off relays.
NOTICE
Ö The external sensor must provide a measuring current between 4 and 20 mA.
NOTE: The final value of 20 mA can be set in the menu "20 mA => level" in order to calibrate the display in cm.
NOTE: Connection of the Aqua XL floats
Aqua XL floats have a 3-wire connection cable. Cut the blue wire and connect the other 2 wires to the location provided in the
control box (see 4.2.1 Locations overview).
• Activate TH1 in
control box (see 6.2.1
Parameter settings).
• Deactivate TH2
P1
installing a bridge.
I
Deactivate TH1 by installing
a bridge.
P1
I
-20V +20V
20 V output : only for external sensor 4-20 mA (GND)
Alarm oat (SWHW)
ON oat (SWN2)
OFF oat (SWN1)
No connection of thermocontactors:
the
TH1TH2
by
O
Connection of both thermocontactors (for example, for ATEX pumps)
TH1 TH2
TB TB TB
1 2 3
O
19
Deactivate both TH1 and TH2 by
installing a bridge.