Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual page 172

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Control input
Control input function
Twin-head pump ext.
OFF function
Fig. 65: Digital input menu
Twin-head pump
ext. OFF function
System mode
Single mode
Combined mode
Fig. 66: Selectable modes for ext. OFF with
twin-head pump
172
Communication interfaces: Setting and function
Procedure with EXT. OFF for twin-head pumps
The function EXT. OFF always behaves as follows:
ƒ
EXT. OFF active: contact is open, pump is stopped (OFF).
ƒ
EXT. OFF inactive: contact is closed, pump runs in normal operation (ON).
The twin-head pump consists of two partners:
ƒ
Main pump: Twin-head pump partner with connected differential pressure sensor
ƒ
Partner pump: Twin-head pump partner without connected differential pressure
sensor
The configuration of the control inputs has no effect on EXT. OFF which can influence
the behaviour of the two twin-head pump partners.
The possible behaviours are described in the following tables.
System mode
The control input DI1 is equipped in the factory with a converter bridge and the func-
tion "EXT. OFF" is active.
The control input on the main pump switches both twin-head pump partners.
The control input of the partner pump is ignored and has no meaning regardless of its
configuration. If the main pump fails or the twin-head pump connection is disconnec-
ted, the partner pump is also stopped.
Main pump
States EXT. Behaviour
OFF of the
pump mo-
tor
1 Active Off
2 Not act- On
ive
3 Active Off
4 Not act- On
ive
Table 26: System mode
Single mode
The control input DI1 is equipped in the factory with a converter bridge and the func-
tion "EXT. OFF" is active. Each of the two pumps is individually switched by its own
control input. If the main pump fails or the twin-head pump connection is disconnec-
ted, the control input of the partner pump is evaluated.
Main pump
States EXT. Behaviour
OFF of the
pump mo-
tor
1 Active Off
2 Not act- On
ive
3 Active Off
Partner pump
Display EXT. Behaviour
text for OFF of the
active in- pump mo-
fluences tor
OFF Active Off
Override
OFF (DI1)
OK; normal Active On
operation
OFF Not act- Off
Override ive
OFF (DI1)
OK; normal Not act- On
operation ive
Partner pump
Display EXT. Behaviour
text for OFF of the
active in- pump mo-
fluences tor
OFF Active Off
Override
OFF (DI1)
OK; normal Active Off
operation
OFF Not act- On
Override ive
OFF (DI1)
Display
text for
active in-
fluences
OFF
Override
OFF (DI1)
OK; normal
operation
OFF
Override
OFF (DI1)
OK; normal
operation
Display
text for
active in-
fluences
OFF
Override
OFF (DI1/2)
OFF
Override
OFF (DI1/2)
OK; normal
operation
WILO SE 2022-05