Stenner Pumps S Serie Manual De Instalación Y Mantenimiento página 32

CONTROL MODES MENU
4-20mA
page 1 of 3
Operator can configure the pump to respond proportionally to a 4-20mA analog signal. The pump's
speed varies according to the level of the 4-20mA signal. The response to the signal can be scaled or
inverted (refer to Diagram 1, 2 & 3).
When operating in an inverted response curve where the minimum signal is associated with the
maximum pump speed, the pump will run at the maximum set speed if the signal is lost. It is extremely important to
properly set the alarms to prevent overfeed on a loss of signal.
MAXIMUM SIGNAL VOLTAGE LEVEL IS 36VDC.
To customize the pump response, set the signal values and the pump speed percent for the high and low range of the
signals (refer to Diagram 1).
The signal level and associated speed set points can be set to any level, as long as there is at least 1mA difference
between the minimum and maximum signal level and a 10% difference in the speed percent between the two points
(refer to Diagram 3).
100
75
50
25
0
4 6 8 10 12 14 16 18 20
mA Input
Diagram 1
Example of standard 4-20mA
response curve. Pump programmed
to 0% speed @ 4.0mA and 100%
speed @ 20.0mA.
S Series FW 4.01.02 US and Canada 800.683.2378, International 904.641.1666 www.stenner.com
continued
100
75
50
25
0
4 6 8 10 12 14 16 18 20
mA Input
Diagram 2
Example of standard 20-4mA
inverted response curve. Pump
programmed to 100% speed @
4.0mA and 0% speed @ 20.0mA.
32
100
75
50
25
0
4 6 8 10 12 14 16 18 20
mA Input
Diagram 3
Example of response curve with
pump programmed to 25% speed
at 5.0mA and 75% speed at
16.0mA.