Evoqua WALLACE & TIERNAN DEPOLOX 400 M, Operating Manual, Page: 19 / 152

DEPOLOX
®
400 M
Description
3.
19
3.4.6 Safety functions
The electronic module is equipped with various integrated safety func
-
tions to ensure system safety and minimize the risk of accidents. The fol
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lowing safety functions are integrated:
• safety deactivation if the sample water flow is too low and/or if the
dosing tank signals that it is empty (depending on the configuration
of the digital inputs)
• alarms freely configurable
• external STOP for dosing (depending on the configuration of the dig
-
ital inputs)
• password protection with three levels
3.4.7 Digital inputs
There are five integrated digital inputs on the CPU board of the electronic
module. They are provided for connection of voltage-free contacts
(< 100 Ohm) and are supplied internally with 5 V.
Warning!
Do not apply voltages at the digital input terminals!
The functions of the digital inputs can be configured for the specific cus
-
tomer 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 monitoring 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 monitoring delay time:
Dosing is switched off.
Display:
• Controller switch-off is only effective in automatic mode.
Digital input DI 2 to DI 5 Use as an alarm (freely configurable).