135
6.10 External forced control
The pump incorporates inputs for external signals for
the forced-control functions:
• Start/stop of pump (terminals 7 and 8 in master
pump).
• Max. curve duty (terminals 7 and 10 in master
pump).
• Min. curve duty (terminals 7 and 9 in master
pump).
During forced control, the light fields/indicator lights
on the pump will show which function is active.
Functional diagram: Start/stop input:
Functional diagram: Max. curve input:
The max. curve input is only active if the start/stop
input is closed.
Functional diagram: Min. curve input:
The min. curve input is only active if the start/stop
input is closed and the max. curve input is open.
6.11 Deactivating the control panel
Can be set by means of the R100.
The buttons on the master pump control panel can
be deactivated to prevent unauthorized persons from
operating the pump.
6.12 Bus communication
If the pump is to be connected to a PMU 2000 or
PCU 2000, it must be set to single-pump operation,
see supplement to these instructions.
The pump enables serial communication via an
RS-485 input. The communication is carried out
according to the Grundfos bus protocol, GENIbus,
and enables connection to the GRUNDFOS Pump
Management System 2000, a building management
system or another type of external control system.
Via the bus signal, it is possible to remote-set pump
operating parameters, such as desired head, tem-
perature influence, operating mode, etc. At the same
time, the pump can provide status information about
important parameters, such as actual head, actual
flow, power input, fault indications, etc.
For further details, consult the operating instructions
for the GRUNDFOS Pump Management System
2000 or contact Grundfos.
Note: When the pump is controlled via a bus signal,
the number of settings available on the pump control
panel or via the R100 will be reduced.
The pump head and control mode can only be set via
the bus signal. The pump control panel or the R100
can only set the pump to max. curve and to stop.
However, an R100 is required if a number is to be
allocated to the pump. See also section 7.7 Priority
of settings.
6.13 Wireless remote control
For wireless operation and reading of data, use the
Grundfos remote control R100.
For application of the remote control, see section
7.3 R100.
Start/stop
Normal duty
Stop
Max. curve
Normal duty
Max. curve
Min. curve
Normal duty
Min. curve
(night-time duty)
Q
H
Q
H
Q
H
Q
H
Q
H
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