Wilo Yonos GIGA2.0-D, Installation And Operating Instructions Manual

Page: 172 / 424

en Communication interfaces: Setting and function
172 WILO SE 2022-05
Procedure with EXT. OFF for twin-head pumps
Control input
Control input function
Twin-head pump ext.
OFF function
Fig. 65: Digital input menu
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
Twin-head pump
ext. OFF function
System mode
Single mode
Combined mode
Fig. 66: Selectable modes for ext. OFF with
twin-head pump
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 Partner pump
States EXT.
OFF Behaviour
of the
pump mo-
tor Display
text for
active in-
fluences EXT.
OFF Behaviour
of the
pump mo-
tor Display
text for
active in-
fluences
1 Active Off OFF
Override
OFF (DI1) Active Off OFF
Override
OFF (DI1)
2 Not act-
ive On OK; normal
operation Active On OK; normal
operation
3 Active Off OFF
Override
OFF (DI1) Not act-
ive Off OFF
Override
OFF (DI1)
4 Not act-
ive On OK; normal
operation Not act-
ive On OK; normal
operation
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 Partner pump
States EXT.
OFF Behaviour
of the
pump mo-
tor Display
text for
active in-
fluences EXT.
OFF Behaviour
of the
pump mo-
tor Display
text for
active in-
fluences
1 Active Off OFF
Override
OFF (DI1) Active Off OFF
Override
OFF (DI1/2)
2 Not act-
ive On OK; normal
operation Active Off OFF
Override
OFF (DI1/2)
3 Active Off OFF
Override
OFF (DI1) Not act-
ive On OK; normal
operation