Operation - Wilo Control EC-Booster Installation And Operating Instructions Manual

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6.5.18 Low water level (dry-running pro-
tection) alarm connection
!
Fig. 29: Connection overview symbol
6.5.19 Connection ModBus RTU
Control EC/ECe-B2 Control EC/ECe-B3
Fig. 30: Jumper position
7

Operation

24
If the water level falls below the low water level, a fault message is generated via a separate
output:
• Contact type: potential-free NC contact
• Contact load:
–
Minimum: 12 V=, 10 mA
–
Maximum: 250 V~, 1 A
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Connect the wires to the terminal strip according to the connection diagram. Use the
terminal number shown in the connection overview on the cover.
See Overview of components: Wilo-Control EC-Booster [" 12] for position numbers
9 ModBus: RS485 interface
10 ModBus: Jumper for termination/polarisation
J4
J2
J3
The ModBus protocol is available for connection to a building management system.
• Insert the connection cable laid by the customer through the threaded cable glands and
secure.
• Connect the wires to the terminal strip according to the connection diagram.
Observe the following points:
• Interface: RS485
• Field bus protocol settings: Menu 2.01 to 2.05.
• The switchgear is terminated at the factory. Remove termination: Remove jumper "J2".
• If the ModBus requires a polarisation, plug in jumpers "J3" and "J4".
See also
▶ Overview of components: Wilo-Control EC-Booster [} 12]
Installation and operating instructions • Wilo-Control EC/ECe-Booster • Ed.02/2023-08
DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
• Electrical work must be carried out by a qualified electrician.
• Observe local regulations.
CAUTION
Property damage due to external voltage!
An external voltage which is applied destroys the component.
• Do not apply external voltage.
DANGER
Danger of death due to electrical current!
There is danger of death from open switchgear.
• Only operate the switchgear when closed.
• Electrical work on the internal components must be carried out by a
qualified electrician.