Evoqua DEPOLOX, Инструкция по эксплуатации

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DEPOLOX® 400 M 3. Description
13
EN
Sample water monitoring
The sample water monitoring must be che-
cked regularly. Without automatic detection
of a shortage of sample water or an excessi-
vely low flow rate, there is a risk of uncontrol-
led dosing of chemicals. The sample water
monitoring deactivates dosing if there is a
shortage of sample water and prevents the
uncontrolled dosing of chemicals.
3.6.7 Digital inputs
There are five integrated digital inputs on the
CPU board of the electronics module. They are
provided for connection of voltage-free con-
tacts (< 100 Ohm) and are supplied internally
with 24 V.
The functions of the digital inputs can be con-
figured for the specific customer application n
the "Input/Output” menu. Digital input 1 is
used for sample water monitoring and cannot
be changed.
Digital input DI 1
With the help of the voltage-free contact of
the flow rate monitor on the flow fitting, the
controllers can be influenced:
• before expiry of the sample water moni-
toring delay time (0 to max. 10 min.):
Dosing continues at the same rate
The
symbol on the display flashes.
Display:
• after expiry of the sample water monito-
ring delay time:
Dosing is switched off.
Display:
Digital input DI 2 to DI 5
Various functions can be assigned to the digi-
tal inputs. With the help of a voltage-free ena-
bling contact, e.g. circulation off, the
controllers can be stopped immediately:
• Use as an alarm (freely configurable).
• The chlorine dosing pump and the dosing
pump for pH correction are switched off.
The positioner moves to 0 %.
Display:
(example)
• Empty signal contact of the chemical
tank(s).
The chlorine dosing pump and the dosing
pump for pH correction are switched off.
The positioner moves to 0 %.
Display:
(example)
• Standby function
When the Standby function is activated,
all controllers are switched off and dosing
is deactivated. The alarms are disabled.
Measured value displays are hidden.. This
function is used to switch off the circula-
tion to prevent measurements and incor-
rect controller outputs.
DANGER
Risk of injury or death
If there is a shortage of sample water or the
flow rate is too low, there is a risk of uncon-
trolled dosing of chemicals. To ensure safe
operation and prevent injury, the sample
water monitoring must never be disabled.
Never disable the sample water monitoring -
even temporarily, e.g. by bridging the signal
input.
WARNING
Do not apply voltages at the digital input ter-
minals!
NOTICE
Controller switch-off is only effective in
“Safety MAN. mode“.
NOTICE
Controller switch-off is only effective in
“Safety MAN. mode“.
NOTICE
When the contact closes, restart of the cont-
roller may be delayed due to the dosing
delay time. In as-delivered status, the digital
inputs are disabled. To activate the function,
connect an external contact and configure
the digital input in the menu. The digital
inputs can also be assigned as alarms.
DI 2
DI 3