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Designation
Assignment
Individual run signal/collective run
signal, readiness signal and "mains
on" signal
SBM
Individual/collective fault signal
SSM
Terminals of the serial digital BA in-
IF module interface
terface
Table 13: Terminal assignment
6.7.6
Differential pressure sensor con-
nection
6.7.7
Making the electrical connection
6.8
Protective devices
34
Installation and electrical connection
Notes
Potential-free individual run signal/collective run signal (changeover con-
tact), operation readiness signal is available at the SBM terminals (menus
<5.1.6.0>, <5.7.6.0>).
Contact load:
minimum permitted: 12 V DC, 10 mA,
maximum permitted: 250 V AC/24 V DC, 1 A
Potential-free single/collective fault signal (changeover contact) is avail-
able at the SSM terminals (menu <5.1.5.0>).
Contact load:
minimum permitted: 12 V DC, 10 mA,
maximum permitted: 250 V AC/24 V DC, 1 A
The optional IF module is inserted into a multi-plug in the terminal box.
The connection is twistproof.
NOTICE
The terminals In1, In2, AUX, GND, Ext. off and MP meet the requirement for "safe
isolation" according to EN 61800-5-1
– to the mains terminals
– and to the SBM and SSM terminals (and vice versa).
The control system is configured as a PELV (protective extra low voltage) circuit.
This means that the (internal) supply meets the requirements for safe supply isola-
tion; the GND is connected to PE.
Cable
Colour
black
1
blue
2
brown
3
Table 14: Differential pressure sensor cable connections
NOTICE
The electrical connection of the differential pressure sensor should be fed through
the smallest threaded cable gland (M12) on the electronic module.
For twin-head pump operation in a Y-pipe installation, connect the differential
pressure sensor to the master pump. Arrange the measuring points of the differen-
tial pressure sensor in the common collector pipe on the suction and discharge side
of the Y-pipe installation
ƒ
Make the connections in accordance with the terminal allocation.
ƒ
Earth the pump/installation as per regulations.
ƒ
Reinstall any uninstalled safety devices, e.g. module cover!
WARNING
Risk of burns from hot surfaces!
The spiral housing and the discharge cover assume the temperature of the fluid dur-
ing operation. It may cause burns.
• Depending on the application, insulate the spiral housing.
• Provide corresponding guards.
• Allow the pump to cool down at ambient temperature after switching it off!
• Observe local regulations.
Terminal
Function
In1
Signal
GND
Earth
+24 V
+24 V
WILO SE 2020-10
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