Eng
lish (US)
26
8.1.10
Relay outputs
The pump incorporates two signal relays for potential-free
signalling.
The signal relays can be configured to be activated by one of the
following incidents:
•
Ready
•
Operation
•
Alarm
•
Warning
•
Pump running
•
Control of external fan
•
Not active
.
8.1.11
Analog output
Whether the analog output is available or not, depends on the
functional module fitted in the pump:
To set up the analog output, make the settings below.
Output signal
•
0-10 V
•
0-20 mA
•
4-20 mA
.
Function of analog output
•
Actual speed
•
Actual value
•
Resulting setpoint
•
Motor load
•
Motor current
.
8.1.12
Operating range
Set the operating range as follows:
• Set the min. speed within the range from fixed min. speed to
user-set max. speed.
• Set the max. speed within the range from user-set min. speed
to fixed max. speed.
The range between the user-set min. and max. speeds is the
operating range. See fig. 39.
Fig. 39
Example of min. and max. settings
8.1.13
Setpoint influence
External setpoint influence
It is possible to influence the setpoint by an external signal, either
via one of the analog inputs or, if an advanced functional module
is fitted, via one of the Pt100/1000 inputs.
If more than one input has been set up for setpoint influence, the
function will select the analog input with the lowest number, for
example "
Analog input 2
", and ignore the other inputs, for
example "
Analog input 3
" or "
Pt100/1000 input 1
".
Example
See fig. 40.
At a lower sensor value of 0 bar, a set setpoint of 30 psi and an
external setpoint of 60 %, the actual setpoint is 0.60 x (30 - 0) + 0
= 18 psi.
Actual setpoint = actual input signal x (setpoint - lower value) +
lower value.
Fig. 40
Example of setpoint influence
Function (terminal)
FM 300
(advanced)
Relay output 1
(NC, C1, NO)
●
Relay output 2
(NC, C2, NO)
●
Function (terminal)
FM 300
(advanced)
Analog output
●
Speeds below 25 % may result in noise from the
shaft seal.
T
M
00
67
85
50
95
Before the "
Digital inputs
" can be enabled, one of the
analog inputs or Pt100/1000 inputs must be set to
"
External setpoint function
".
TM
06
36
36
02
15
Max. speed (fixed)
User-set max. speed
Operating range
User-set min. speed
Min. speed (fixed)
24 %
12 %
0 %
67 %
100 % (110 %)
Setpoint influence
[%]
External
setpoint
signal [%]
Actual
input
signal
Actual setpoint
Setpoint
Upper value
Lower value