Grundfos DMX 226 Installatie- En Bedieningsinstructies pagina 11
Dosing pump
Verberg thumbnails
Zie ook voor DMX 226:
- Installatie- en bedieningsinstructies (36 pagina's) ,
- Installatie- en bedieningsinstructies (14 pagina's)
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3.8 AR control unit
Functions of pumps with electronics:
•
"Continuous operation" button for function test and dosing
head deaeration
•
memory function (stores a maximum of 65,000 pulses)
•
two-stage tank-empty signal (e.g. via Grundfos tank empty
sensor)
•
stroke signal/pre-empty signal (adjustable), e.g. as a feedback
to the control room
•
dosing controller function (only with sensor - optional)
•
diaphragm leakage detection (only with sensor - optional)
•
access-code-protected settings
•
remote on/off
•
hall sensor
•
operating hours counter
•
motor monitoring.
Operating modes:
•
manual
Stroke frequency: manually adjustable between zero and
maximum
•
contact signal control
Multiplier (1:n) and divisor (n:1)
•
current signal control 0-20 mA / 4-20 mA
Adjustment of stroke frequency proportional to the current
signal.
Weighting of current input.
3.8.1 Inputs and outputs
Inputs
Contact signal
Current 0-20 mA
Remote on/off
Two-stage tank-empty signal
Dosing controller and diaphragm leakage sensor
Outputs
Maximum load: 350 Ω
Current 0-20 mA
Maximum ohmic load: 50 VDC / 75 VAC, 0.5
Error signal
A
Stroke signal
Contact time/stroke: 200 ms
Maximum ohmic load: 50 VDC / 75 VAC, 0.5
Pre-empty signal
A
AR control unit factory settings
•
Inputs and outputs: NO (normally open)
or
•
inputs and outputs: NC (normally closed).
3.9 Materials
Pump
•
Pump housing: Al 226
•
Diaphragm flanges: GG 25
•
Stroke-length adjustment knob: ABS.
AR control unit enclosure
•
Upper part of enclosure: PPO blend
•
Lower part of enclosure: aluminium.
Optoelectronic diaphragm sensor
•
Housing: ABS.
Maximum load: 12 V, 5 mA
Maximum load: 22 Ω
Maximum load: 12 V, 5 mA
Maximum load: 12 V, 5 mA
11
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