12
6.8 External analog 0-10 V controller
The pump has an input for an external 0-10 VDC an-
alog signal transmitter (terminals 11 and 12). Via this
input, the pump can be controlled by an external
controller if the pump has been set to one of the fol-
lowing control modes:
•
Constant curve
.
The external analog signal will set the pump curve
within the range from the min. curve to the con-
stant curve selected according to the characteris-
tic in fig. 10.
•
Pressure control
.
The external analog signal will control the setpoint
for the pump head between the setpoint corre-
sponding to the min. curve and the setpoint se-
lected according to the characteristic in fig. 10.
At an input voltage lower than 0.5 V, the pump will
operate according to the min. curve. The setpoint
cannot be changed.
The setpoint can only be changed when the input
voltage is higher than 0.5 V.
Fig. 10
Note:
• The max. curve input, terminals 7 and 10, must be
open.
• The min. curve input, terminals 7 and 9, must be
closed.
6.9 External forced control
The pump incorporates inputs for external signals for
the forced-control functions:
• Start/stop of pump (terminals 7 and 8).
• Max. curve duty (terminals 7 and 10).
• Min. curve duty (terminals 7 and 9).
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 in-
put is closed and the max. curve input is open.
6.10 Deactivating the control panel
Can be set by means of the R100.
The buttons on the pump control panel can be deac-
tivated to prevent unauthorized persons from operat-
ing the pump.
6.11 Bus communication
The pump enables serial communication via an
RS-485 input. The communication is carried out ac-
cording 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 al-
located to the pump. See also section
7.7 Priority of
settings
.
Start/stop
Normal duty
Stop
8
9
0
10
7
6
5
4
3
2
1
m
V
H
U
Max. head/constant curve
Head set/constant curve
Min. curve
TM
00
55
50
45
96
Q
H
Q
H
Max. curve
Normal duty
Max. curve
Min. curve
Normal duty
Min. curve
(night-time duty)
Q
H
Q
H
Q
H
Q
H
