6
Description and function
EN Rivo™ I Controller
38
W3T597263 Issue 01-0624 | Evoqua Water Technologies GmbH
6.9.3 2-point pulse-frequency controller for solenoid
pumps
Solenoid pumps are controlled with 0 to a maximum of
180 pulses per minute, depending on the specification of
the connected pump. The electronics module supports
pumps with 100, 120, 140, 160 and 180 pulses per min-
ute.
The minimum duty cycle is 0.15 s. The pause time is cal-
culated depending on the dosing rate.
Example of a solenoid pump at 120 pulses/min:
6.9.4 Analog 2-point output
As an option, the electronics module can be retrofitted
with a 2-way mA output module (Rivo™ Flex Mod 2AO
mA). These mA outputs can be configured as registration
or control outputs.
In the selection “Analog output 2p,” the mA output is firmly
assigned as a control output.
With a control output of 0%, the output current is 0 or 4
mA, while with a greater Yout, the output current reaches
up to 20 mA. Dosing pumps with mA control input, control
valves with mA signal input, for example, can be used as
actuators.
6.10 mA outputs
As an option, the electronics module can be equipped with
a Rivo™ Flex Mod 2AO-mA 2-channel output module.
Both mA outputs are electrically isolated and can be freely
assigned. The output signals can be configured as 0 to 20
mA and 4 to 20 mA.
If an mA value of 3.4 mA is not reached in the setting 4 to
20 mA, this is detected as a line break and an error is gen-
erated.
Yout in % Pulses/min
100... 120...
84... 96...
72... 85...
56 75
50... 60...
33... 40...
25... 30...
10... 12...
5... 6...
10 10
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